Since 1952
America's Oldest Speed Shop ®
Speedway Motors Bill Smith
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Products

Speedway Motors is the open wheel racing engine authority! Whether you have a 360, 410, USAC or Outlaw series Chevy race engine, Speedway has every part Sprint and Midget racers need. Our large assortment of cylinder heads, camshafts and racing valve train components allows you to tailor your engine for any racing condition. Speedway also has a variety of durable forged rotating assemblies, dry sump oiling systems and Dart engine blocks that can survive the rigors of open wheel racing. Race and win with Speedway Motors!

"Open Wheel, Cylinder Block Components" Page 1 of 11

  • Speedway Small Block Chevy Crankshaft Wiper
    Speedway Small Block Chevy Crankshaft Wiper
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    Removes excess oil from the crankshaft to improve top end horsepower and reduce windage. Fits Small Block Chevy. Mounts to the starter side of the block.

    Slight trimming may be required. For best results, trim to within .045" of the rods and counterweights.

  • Speedway Small Block Chevy Main Cap Studs, Set of 5
    Speedway Small Block Chevy Main Cap Studs, Set of 5
    x
                Stock extended style main cap studs. Used to mount windage trays. Small Block Chevy. Set of 5.
            
  • Manley 42171 Small Block Chevy Head Bolts
    Manley 42171 Small Block Chevy Head Bolts
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    Heavy duty design, longer than stock, for use with head bolt washers. 

    • 180,000 PSI material
    • Longer than stock for use with washers
    • Improved wrenchability with 1/2" hex head

    Order one set per head (two sets required per motor). Washers sold separately. 

  • Main Bearing Spacers - Small Block Chevy, 350 Crank
    Main Bearing Spacers - Small Block Chevy, 350 Crank
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                Put a 350 crank in a 400 block.  Simply snap in and install regular 350 main bearings.  Reusable. 

    Spacer bearing makes up for difference in crank journal diameters.

  • Small Block Chevy 4340 Steel H-Beam Rods, Bushed Pin
    Small Block Chevy 4340 Steel H-Beam Rods, Bushed Pin
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    Heavy duty H-beam connecting rods for S/B Chevy. Full floating wrist pin in silicon bronze bushing. Precision bolt bushing to positively locate cap. Features 8640 PCE 7/16" cap screws.

    Weight matched sets of 8. Available in 5.7" or 6.0" lengths.

  • Aluminum Crank Flange, Early Small Block Chevy
    Aluminum Crank Flange, Early Small Block Chevy
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    Aluminum crank flange for Small Block Chevy early 2-piece rear main seal

    • Early Small Block Chevy
    • For 2-piece rear main seal 
    • Aluminum
  • Manley 42102 Head Bolt Washers
    Manley 42102 Head Bolt Washers
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                These hardened steel 7/16" washers ensure proper torque readings. Pack of 34 pieces outfits one Small Block Chevy engine.
            
  • EngineQuest RSH350 1986 and Newer S/B Chevy Rear Main Seal Conversion
    EngineQuest RSH350 1986 and Newer S/B Chevy Rear Main Seal Conversion
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                Enables a rebuilder to install a 2-piece design crankshaft in a one-piece seal design block. Billet aluminum. Alignment tool required for installation. Uses a 1986 and later 1-pc rear main style oil pan and gasket.
            
  • Chevy 283-350 V8 Steel Freeze Plug Set
    Chevy 283-350 V8 Steel Freeze Plug Set
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                Complete freeze plug kits available in steel for 283-350 small block Chevy V8.
            
  • Dart 31161211 Special High Performance Chevy Block, 4.125 Inch Bore
    Dart 31161211 Special High Performance Chevy Block, 4.125 Inch Bore
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    Dart's Special High Performance (SHP) small-block meets the need for an affordable, precision-machined cast-iron block with superior features. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP block is the ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts. The SHP block as all the features needed without spending the big bucks and having to wait on your machine shop.

    • All new, precision machined
    • Cast from high nickel iron
    • Priority main oiling system
    • Siamese 4.125" bores
    • At 4.165" bore, .230" wall thickness
    • Clearance for 3.75" stroke w/ steel rods
    • Decks parallel within .002"
    • Made in USA
    • Blind head bolt holes
    • 350 main journals
    • Splayed 4-bolt center main caps
    • Two piece rear main seal
    • Accepts OEM roller rockers and cams
    • Uses 1981-85 oil pans & dipsticks
    • Accepts standard starters and bellhousings

    Dart SHP Block Instructions (PDF)

  • Block Off Plate - 2006 to Present Yamaha R6 Engine
    Block Off Plate - 2006 to Present Yamaha R6 Engine
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                Seal the void left by eliminating the emissions air pump when using carburetors on a 2006 to present year Yamaha R6 engine.
            
  • 2-In-1 S/B Chevy Engine Rotating Tool & Balancer Bolt/Washer
    2-In-1 S/B Chevy Engine Rotating Tool & Balancer Bolt/Washer
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    This dual-purpose hardened steel tool serves a both a rotating tool and balancer retainer. It simply fits into the harmonic balancer on Small Block Chevys and provides a positive way of rotating the engine (in either direction) when setting valves, locating TDC or degreeing cam. It is permanently retained on the motor serving as a balancer washer/bolt assembly to retain the balancer/damper on the crank.

    Tool has a 1-1/16" hex head. Instuctions included.

    910-81020 Instructions (GIF)

  • MAHLE Small Block Chevy 305 PowerPak Pistons
    MAHLE Small Block Chevy 305 PowerPak Pistons
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    Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins, and locks. They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.

    • Forged piston for performance applications Fully-machined crown
    • Grafal anti-Friction coating on skirts
    • Phosphate-coated to reduce micro-welding and pin galling
    • Pin bores binished on CNC boring equipment
    • Deburred
    • High strength, light weight steel pins
    • Race proven round wire locks
    • Low drag ring pak
    • Lightweight slipper kirt forgings

    1.5, 1.5, 3.0mm file fit performance ring set included. For 305 c.i. S/B Chevy (3.736" bore x 3.48" stroke).

    • C/R 58cc:  10.0 
    • C/R 64cc:  9.3
    • C/R 70cc:  8.7

     

  • Clevite H-Series 1969-Up Small Block Chevy Rod Bearings
    Clevite H-Series 1969-Up Small Block Chevy Rod Bearings
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                Clevite's H-Series was developed primarily for use in NASCAR type racing, but  they are suitable for all types of competition engines. These sets are  specifically for 1969-Up 302-305-327-350 S/B Chevy "Large Journal" engine (with 2.100" rod  journals).
    • Use H-series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range.
    • H-Series bearings should be used if contact patterns obtained with P-series parts are too narrow. Contact pattern should ideally cover 2/3 to 3/4 of the bearing surface.
    • If you aren't sure which type of performance bearing to start with, the H-Series will be your best choice.

    H-Series Features (Link)
  • Scat 25700716 Small Block Chevy 4340 I-Beam Rods, 5.7 Inch, Bushed Pin
    Scat 25700716 Small Block Chevy 4340 I-Beam Rods, 5.7 Inch, Bushed Pin
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    These Scat Pro Comp 4340 forged bushed I-beam connecting rods come with huge 7/16" ARP cap screw bolts, which greatly increase strength and horsepower capabilities. In fact, Pro Comp series rods include some strength adders found in H-beam designs:

    • One-rib cap design for added strength and bearing support
    • Polished beams to eliminate stress risers
    • Special hollow dowels
    • Profile clearanced for stroker applications
  • Labor To Side Clearance Rods and Balance Rotating Assembly, 350/377 Kits
    Labor To Side Clearance Rods and Balance Rotating Assembly, 350/377 Kits
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                All balancing is done with our state-of-the-art "hines" balancer by race mechanics with over 30 years of experience. A kit purchased with the optional balance job will ship in 24-48 hours. 


  • Clevite H-Series Small Block Chevy Main Bearings
    Clevite H-Series Small Block Chevy Main Bearings
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    Clevite's H-Series was developed primarily for use in NASCAR type racing, but they are suitable for all types of competition engines. These sets are specifically for 1969-Up 302-305-327-350 S/B Chevy.

    • Use H-series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range.
    • H-Series bearings should be used if contact patterns obtained with P-series parts are too narrow. Contact pattern should ideally cover 2/3 to 3/4 of the bearing surface.
    • If you aren't sure which type of performance bearing to start with, the H-Series will be your best choice.

    H-Series Features (Link)

  • MAHLE Small Block Chevy 350 Powerpak Pistons, Flattop, 5.7 Rod
    MAHLE Small Block Chevy 350 Powerpak Pistons, Flattop, 5.7 Rod
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    The Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins and locks. They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.

    1.5mm, 1.5mm, 3.0mm file fit performance ring set is included. For 350 c.i. S/B Chevy (4.000" bore x 3.48" stroke).

    • Comp Height 5.7" Rod:  1.550
    • Pin Diameter:  0.927
    • Clearance Guide
      • *Meas. = 0.500
      • Min = 0.0025
      • Max = 0.0033

    *The location to measure piston-to-wall clearance for each application. This point is calculated from the bottom of the piston skirt and indicates the widest part of the piston and thus where to measure. For all Mahle 350 pistons except 4V Flat 503-55004 for which Meas. = 0.465

    PowerPak Piston Chart Application (GIF)

  • French Grimes Racesaver Sprint 305 Chevy Brodix Cylinder Heads
    French Grimes Racesaver Sprint 305 Chevy Brodix Cylinder Heads
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    • Racesaver Sprint Series spec Brodix cylinder heads
    • Fully assembled
    • Heads are certified serial numbered
    • Ready and legal for use on a 305 c.i. Racesaver engine
  • Clevite P-Series 1969-Up Small Block Chevy Main Bearings
    Clevite P-Series 1969-Up Small Block Chevy Main Bearings
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    Not to be confused with standard "passenger" car bearings, Clevite's P-Series is their oldest line of premium high performance bearings. These sets are specifically for 302-305-327-350 S/B Chevy "Large Journal" engines built from 1969-Up (with 2.100" rod journal).

    • Use P-Series rod bearings where extremely high RPM’s cause severe rod bore close-in.
    • Use P-Series main bearings where higher eccentricity is desired to narrow bearing contact patterns and to provide increased oiling to rod bearings.

    Note: Will not work with 400 c.i. V-8.

    P-Series Features (Link)

    Clevite Application Chart

  • Clevite P-Series 1969-Up Small Block Chevy Rod Bearings
    Clevite P-Series 1969-Up Small Block Chevy Rod Bearings
    x
                

    Not to be confused with standard "passenger" car bearings, Clevite's P-Series is their oldest line of premium high performance bearings. These sets are specifically for 400 c.i. S/B Chevy V-8 engines (1970-1980).

    • Use P-Series rod bearings where extremely high RPM’s cause severe rod bore close-in.
    • Large Journal
    • Use P-Series main bearings where higher eccentricity is desired to narrow bearing contact patterns and to provide increased oiling to rod bearings.

    P-Series Features (Link)

  • Speedway Small Block Chevy Connecting Rod Bolts, 3/8 Inch Diameter
    Speedway Small Block Chevy Connecting Rod Bolts, 3/8 Inch Diameter
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    Speedway connecting rod bolts are made from special alloy steel. Heat-treated with cryogenic freezing for long lasting endurance. Rod Bolts are 100% magnaflux inspected.

    Includes Grade 8 self-locking nuts. Set for 8 rods.

  • Total Seal Conventional Piston Rings, 4.00 Bore, Style A
    Total Seal Conventional Piston Rings, 4.00 Bore, Style A
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    For years Total Seal has been leader in performance ring technology. These conventional style ring sets featuring a plasma moly ductile iron top ring, cast second and a 3-piece oil ring.

    Available in drop-in or file fit.

    Ring Style Chart (GIF)

  • ARP Fasteners 134-5401 Small Block Chevy 2 Bolt Main Stud Kit
    ARP Fasteners 134-5401 Small Block Chevy 2 Bolt Main Stud Kit
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                Choose ARP S/B Chevy Main Stud Kits for the ultimate in strength and reliability.  These studs are for large journal 2-bolt main blocks.
            
  • King XP Series Chevy 350 Main Bearings
    $60.99
    $96.35
    King XP Series Chevy 350 Main Bearings
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    • Enhanced tri-metal copper lead construction with nickel barrier and SecureBond adhesion 
    • Unique SecureBond adhesion process for superior stability between the top and intermediate layers
    • 15% - 30% greater load capacity than traditional bearings
    • Mains and rods are narrowed for large radius crankshafts
    • Greater rod bearing height improves bearing-to-bore contact/heat transfer and reduces spin potential at high RPM
    • 0.0005" metallurgically enhanced and hardened performance overlay withstands greater loads and better resists surface fatigue
    • Mains are 1/2 grooved for uncompromised lower shell load capacity
  • King HP Series 1969-Up Small Block Chevy Rod Bearings
    King HP Series 1969-Up Small Block Chevy Rod Bearings
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    • Bi-metal aluminum silicon alloy featuring fine micro-bore finish
    • Mains and rods are narrowed for large radius crankshafts
    • Greater rod bearing height improves bearing-to-bore contact/heat transfer and reduces spin potential at high RPM
    • 0.015" thick top layer for superior macro particle embedability and conformability
    • 40 Vickers hardness to resist overlay migration and extrusion
    • 450°F heat threshold for superior protection against friction and overheating
  • Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore
    Dart 31161111 Special High Performance Chevy Block, 4.00 Inch Bore
    x
                

    Dart's Special High Performance (SHP) small-block meets the need for an affordable, precision-machined cast-iron block with superior features. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP block is the ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts. The SHP block as all the features needed without spending the big bucks and having to wait on your machine shop.

    • All new, precision machined
    • Cast from high nickel iron
    • Priority main oiling system
    • Siamese 4.000" bores
    • At 4.165" bore, .230" wall thickness
    • Clearance for 3.75" stroke w/ steel rods
    • Decks parallel within .002"
    • Made in USA
    • Blind head bolt holes
    • 350 main journals
    • Splayed 4-bolt center main caps
    • Two piece rear main seal
    • Accepts OEM roller rockers and cams
    • Uses 1981-85 oil pans & dipsticks
    • Accepts standard starters and bellhousings

    Dart SHP Block Instructions (PDF)

  • Total Seal Claimer Piston Rings, 4.00 Bore, Styles A, C, D
    Total Seal Claimer Piston Rings, 4.00 Bore, Styles A, C, D
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                These new, lower priced rings are designed for claimer-type motors. Claimer sets feature a cast iron, moly coated conventional top ring, Gapless 2nd ring, and Gold power low tension oil rings. Built primarily for dirt track racing engines with 11:1 or lower compression on race fuel. 
    • Moly coated cast iron top ring
    • Gapless 2nd
    • Low tension oil ring

    Ring Style Chart (GIF)

  • Light Forged Small Block Chevy Rotating Assembly, 383 Dome, 6 Inch Rods
    Light Forged Small Block Chevy Rotating Assembly, 383 Dome, 6 Inch Rods
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    Our lightweight forged rotating assembly engine rebuild kits include a 44-45 lb. Scat Superlight 4340 forged 2-pc rear main seal externally balanced crankshaft, Scat 4340 forged I-beam connecting rods and Mahle pistons complete with wrist pins, locks and rings. Rod and main bearings included. Standard size journals.

    Kit also includes balancing which is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience. A kit will ship in 24-48 hours.



  • Scat 2-350-5700-2100-QL Q-Lite S/B Chevy Forged H-Beam Rods, 5.7 Inch
    Scat 2-350-5700-2100-QL Q-Lite S/B Chevy Forged H-Beam Rods, 5.7 Inch
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    Premium Scat forged Q-Lite H-beam rods with ARP 2000 3/8" cap screws

    • Lightest H-beam design available without sacrificing strength
    • Special doweled cap
  • ARP Fasteners 234-4601 Small Block Chevy Undercut Head Studs
    ARP Fasteners 234-4601 Small Block Chevy Undercut Head Studs
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                Install an ARP Small Block Chevy (SBC) head stud kit to enhance cylinder head sealing, ensure consistent torque values and help prevent damage to threads in the block. 

    All kits come with aerospace-quality nuts and parallel-ground, hardened washers.  Kits include undercut short studs that all but eliminate head gasket failure. Undercut studs have a narrowed area on the center of the stud shank. These undercuts add more tensile strength to the stud. 190,000 PSI.

    Not for raised runner heads.


  • Scat 350-4000-6000-21LW F43 Chevy Crankshaft 4 Stroke 350 Main 2.1 Rod
    Scat 350-4000-6000-21LW F43 Chevy Crankshaft 4 Stroke 350 Main 2.1 Rod
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    Lightweight, strong and at a price you can afford. These 4340 forged steel cranks will really make a difference in your performance.

    • Fits small block Chevy with 2-piece rear main seal
    • Straight shot & chamfered oil holes
    • Nitride hardened for superior wear resistance
    • Profiled and pendulum cut counterweights
    • Gun-drilled main line hole for lightening and equalization of crankcase pressure
    • Star tail for reduced weight
  • MAHLE Small Block Chevy 350 Powerpak Pistons, Dome, 6 Inch Rod
    MAHLE Small Block Chevy 350 Powerpak Pistons, Dome, 6 Inch Rod
    x
                

    The Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins and locks. They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.

    1.5mm, 1.5mm, 3.0mm file fit performance ring set is included. For 350 c.i. S/B Chevy (4.000" bore x 3.48" stroke).

    • Comp Height 6.0" Rod:  1.250
    • Pin Diameter:  0.927
    • Clearance Guide
      • *Meas. = 0.500
      • Min = 0.0025
      • Max = 0.0033

    *The location to measure piston-to-wall clearance for each application. This point is calculated from the bottom of the piston skirt and indicates the widest part of the piston and thus where to measure. For all Mahle 350 pistons except 4V Flat 503-55004 for which Meas. = 0.465

    PowerPak Piston Chart Application (GIF)

  • Light Forged Small Block Chevy Assembly, 434 Dome, 6 Inch Rods, 350 Mains
    Light Forged Small Block Chevy Assembly, 434 Dome, 6 Inch Rods, 350 Mains
    x
                

    Our lightweight forged rotating assembly engine rebuild kits include a 44-45 lb. Scat Superlight 4340 forged 2-pc rear main seal crankshaft, Scat 4340 forged I-beam connecting rods and Mahle pistons complete with wrist pins, locks and rings. Rod and main bearings included. Standard size journals.

    All balancing is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience. A kit purchased with the optional balance job will ship in 24-48 hours.

    Choose from standard, .030, or .040 oversize.

    NOTE: These rotating assemblies may require additional charges for heavy metal.

     


  • KB Chevy 350 Hypereutectic Pistons, Dish, 5.7 Rod
    KB Chevy 350 Hypereutectic Pistons, Dish, 5.7 Rod
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    Keith Black Hyperutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by.

    For S/B Chevy 350 c.i. (4.000" bore x 3.48" stroke).

    • 390 Hypereutectic alloy
    • Fully machined crowns and valve reliefs
    • Drilled oil drain backs
    • Full floating wrist pins
    • Triple wound spiral locks
    • Reflective alloy allows 2% power increase
    • Quench dome technology minimizes deterioration
    • Zero deck quench designs
    • Lightweight wrist pins

    Ring Style Chart (GIF)

    474-193 Instructions (PDF)

  • Scat 4-400-4000-6000 434 Chevy 4340 Forged Crankshaft, 4.00 Stroke
    Scat 4-400-4000-6000 434 Chevy 4340 Forged Crankshaft, 4.00 Stroke
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    As you make more and more power it becomes more important to use quality parts. These Scat 4340 forged steel cranks will help keep your motor alive.

    • Straight shot & chamfered oil holes
    • Nitride hardened for superior wear reisistance
    • Lightening holes in all rod throws
    • Large radius on all journals
    • Heat treated, shot peened
    • Designed at SCAT
    • Engineered at SCAT
    • Inspected & micropolished at SCAT
    • For 2-piece rear main blocks
    • 2.100" rod pin
    • 55 lbs.
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