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Founder, 1929-2014
Speedy Bill
Since 1952
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Engine

Shop Chevrolet Performance Parts At Speedway Motors

Chevrolet is a name synonymous with winning. Their crate engines are rigorously tested and proven to provide reliable, durable, and outstanding power. Whether you're an aspiring racer or a seasoned pro, Chevrolet Performance has the crate engine to help you win at every level.


Featured Products
  • GM Performance 10243878 Small Block Chevy 305 Engine Block
    GM Performance 10243878 Small Block Chevy 305 Engine Block
    (Part #35510243878)
    x
                
    This Race Saver replacement for GM's 305 small block uses the same high-quality construction as all GM performance blocks.  It is an all new GM 305 bare engine block and is IMCA RaceSaver approved.
    • Part Number:    10243869
    • Casting number:    10243878
    • Material:    Cast Iron
    • Weight:    147 lbs
    • Block finish:    painted, black
    • Main Caps:    2 - Bolt
    • Main Cap Material:    Cast Iron
    • Oil pump mounting:    Conventional Wet Sump
    • Oil filter mounting:    Spin on
    • Deck Height:    9.025"
    • Deck Finish Machined    Yes
    • Lifter Pattern:    Conventional
    • Finished Bore Size: (as shipped)    3.7360 - 3.7377
    • Bore finish:    Finish Honed
    • Cylinder Bore Design:    Open
    • Cylinder wall thickness:   6.62mm / 0.2606"
    • Main Brg Journal size:    2.45"
    • Oiling System:    Pressurized Priorty Mains
    • Dipstick hole drilled:     LH only - through head deck
    • Crank Seal type    1 piece insert
    • Max Stroke:    3.750"
    • Fuel Pump Mounting:    Machined boss, pushrod not drilled
    • Cam Bearing     finished cam bore (W/brgs) 1.8717 - 1.8707"
    • Lifter type    Hydraulic Roller
    • Front cover - # mounting holes    10
    • Bellhousing mount - # mounting holes    Conventional small-block pattern, 10 x 1.5 mm
    • Starter mounting provision     starter mounting holes drilled and tapped for english threads
    • Motor Mount Holes    Drilled and Threaded 10 x 1.5 mm
  • GM Performance Replacement Valve Cover Gaskets, 602/604 Crate Engine
    GM Performance Replacement Valve Cover Gaskets, 602/604 Crate Engine
    (Part #35510046089)
    x
                Replace those old or leaking valve cover gaskets in your Chevy  602/604 engines with these  quality rubber replacement gaskets.  They are GM Factory replacement and  are sold each. 
    • GM factory replacement 
    • Chevy 602/604 crate engines
    • Sold each
  • GM Performance Replacement Valve Spring Retainer for Chevy 602 Engine
    GM Performance Replacement Valve Spring Retainer for Chevy 602 Engine
    (Part #35510241744)
    x
                Replace your worn out valve spring retainers in your GM  602 engine with  these  quality steel replacement retainers.  They are GM Factory  replacement and  are sold each. 
    • GM factory replacement 
    • Chevy 602 engines
    • Sold each
  • GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine
    GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine
    (Part #91019258602)
    x
                
    The Chevrolet Performance CT350 circle track crate engine delivers competitive and durable power at an economical price! Designed for circle track's weekend warriors, this bullet-proof 350-horsepower, 350-cubic-inch IMCA-sealed racing crate engine (often referred to as the "602 crate") is a tough combination of power and reliability – and it fits almost any racing budget.
     
    Based on GM Performance Parts' popular 350 HO engine, including a brand-new, four-bolt-main block, 9:1 hypereutectic pistons, cast iron crankshaft and GM iron Vortec cylinder heads, the 350/350 Factory Stock version features a high-rise dual-plane intake manifold, 8-quart single kick-out circle track oil pan, valve cover kit with breather tube and breather, and special "kool nut" rocker arm nut design. The 350 HO's unique dual-pattern cam is included, too. It's based on the one found in 1965-67 Corvette 327 engines, but with more lift and duration to clear the engine exhaust quickly and move in more air – providing excellent mid- and high-range power, where you need it on the track.
     
    The 602 crate engine is delivered complete from the oil pan to the intake manifold – including an HEI distributor – the 350/350 CT350 racing crate engine has the proven parts and horsepower to enable a competitive racecar. Getting it into the winner's circle, however, is your job!
    • Track-tested durability
    • Great mid-range power
    • Best horsepower value around
    • Comes sealed with IMCA issued bolts and is approved for use in IMCA
    • Popular in Hobby Stock, Factory Stock, Street Stock, Sport Modified, and Truck classes*

    Specifications:

    • 350 HP @ 5000 RPM, 390 ft. lbs. of torque @ 3800 RPM
    • Bore x Stroke: 4.00” x 3.48”
    • Compression Ratio: 9.1:1
    • 92 Octane recommended fuel
    • Cast Iron, 4-bolt main caps
    • Cam Lift: .435” Intake / .460” exhaust
    • Cam Duration @ .050”: 212 deg. Intake / 222 deg. Exhaust
    • Lobe Separation: 112.5 Degree
    • 1.94” Intake/ 1.50” Exhaust valves
    • Stamped Steel, 1.5:1 Ratio rocker arms
    • Engine weighs 434 lbs. as delivered
    Includes:
    • Fully GM assembled long block
    • Steel Valve Covers w/ Chevy Bowtie Logo Breathers
    • High Rise Aluminum Intake Manifold
    • HEI Distributor
    • 8” Harmonic Balancer
    • Oil pump, pick-up and 8 quart oil pan
    • Front timing cover
    • IMCA-issued bolts
    *Check track rules for correct application. To order the GM-sealed version of this engine, click here.
     
     
     
     
    Be sure to check out our tech article Legal Upgrades for 602/604 Crates to get the most out of your new crate engine. 
  • GM Performance 19154761 602 Chevy Replacement Valve Springs, Set/16
    GM Performance 19154761 602 Chevy Replacement Valve Springs, Set/16
    (Part #35519154761)
    x
                Replace your worn out valve springs in your 1996 LT4 Corvette, ZZ4, GM 602 CT350/400 or ZZ383 engine with these quality steel replacement springs.  Sold as a complete set of 16. 
    • Set of 16 single springs
    • Outside diameter:  1.25"
    • Pressure @ installed height: 80# @ 1.70"
    • Solid height: 1.20"
    • Average Rate (lbs@in): 256
    • Genuine replacement part number 12495494 for 1996 LT4 Corvette, ZZ4, GM 602 CT350/400 and ZZ383 engines
    • Note: Catalog technical description update with correct specs as provided here.
  • GM 19258602 CT350 GM-Sealed 602 Chevy Crate Engine
    GM 19258602 CT350 GM-Sealed 602 Chevy Crate Engine
    (Part #35519258602)
    x
                
    The Chevrolet Performance CT350 circle track crate engine delivers competitive and durable power at an economical price! Designed for circle track's weekend warriors, this bullet-proof 350-horsepower, 350-cubic-inch factory-sealed racing crate engine (often referred to as the "602 crate") is a tough combination of power and reliability – and it fits almost any racing budget.
     
    Based on GM Performance Parts' popular 350 HO engine, including a brand-new, four-bolt-main block, 9:1 hypereutectic pistons, cast iron crankshaft and GM iron Vortec cylinder heads, the 350/350 Factory Stock version features a high-rise dual-plane intake manifold, 8-quart single kick-out circle track oil pan, valve cover kit with breather tube and breather, and special "kool nut" rocker arm nut design. The 350 HO's unique dual-pattern cam is included, too. It's based on the one found in 1965-67 Corvette 327 engines, but with more lift and duration to clear the engine exhaust quickly and move in more air – providing excellent mid- and high-range power, where you need it on the track.
     
    The 602 crate engine is delivered complete from the oil pan to the intake manifold – including an HEI distributor – the 350/350 CT350 racing crate engine has the proven parts and horsepower to enable a competitive racecar. Getting it into the winner's circle, however, is your job!
    • Track-tested durability
    • Great mid-range power
    • Best horsepower value around
    • Factory-sealed for equal competition
    • Popular in Hobby Stock, Factory Stock, Street Stock, Sport Modified, and Truck classes*

    Specifications:

    • 350 HP @ 5000 RPM, 390 ft. lbs. of torque @ 3800 RPM
    • Bore x Stroke: 4.00” x 3.48”
    • Compression Ratio: 9.1:1
    • 92 Octane recommended fuel
    • Cast Iron, 4-bolt main caps
    • Cam Lift: .435” Intake / .460” exhaust
    • Cam Duration @ .050”: 212 deg. Intake / 222 deg. Exhaust
    • Lobe Separation: 112.5 Degree
    • 1.94” Intake/ 1.50” Exhaust valves
    • Stamped steel, 1.5:1 ratio rocker arms
    • Engine weighs 434 lbs. as delivered
    Includes:
    • Fully GM-assembled long block
    • Steel valve covers w/ Chevy bowtie logo breathers
    • High rise aluminum intake manifold
    • HEI distributor
    • 8” harmonic balancer
    • Oil pump, pick-up and 8 quart oil pan
    • Front timing cover
    • Factory GM seals
    *Check track/series rules for approved applications. To order the IMCA-sealed version of this engine, click here.
     
     
     
     
    Be sure to check out our tech article Legal Upgrades for 602/604 Crates to get the most out of your new crate engine. 
  • GM Performance Replacement Valve Lock Keepers, 602/604 Engines, Set/32
    GM Performance Replacement Valve Lock Keepers, 602/604 Engines, Set/32
    (Part #35512495503)
    x
                Replace your worn out valve keepers in your GM  602 or 604 engine with these  quality steel replacement keepers.  They are GM Factory replacement and  are sold as a complete set of 32 pieces. 
    • Set of 32-piece split keepers
    • GM factory replacement 
    • Chevy 602/604 engines
  • GM 19318604 CT400 IMCA-Sealed 604 Chevy Crate Engine
    GM 19318604 CT400 IMCA-Sealed 604 Chevy Crate Engine
    (Part #91019318604)
    x
                
    Run up front with the 400-horsepower CT400 crate engine featuring GM Fast Burn heads! GM Performance Parts' Fast Burn cylinder heads are the fast way to the winner's circle – and they're standard on the 350/400 GM racing engine (often referred to as the "604 crate") from GM Performance Parts.
     
    These IMCA-sealed 604 crate engines are based on the popular Fast Burn 385 street crate engine, but include a racing-only 8-quart circle track oil pan with dual kick-out design, along with a valve cover breather kit and special "kool nut" rocker arm design. The assembly also includes an open-plenum high-rise intake manifold and 1.5:1-ratio aluminum roller rockers.
     
    The 604 crate engine includes a bulletproof bottom end, anchored by a forged steel crankshaft and hypereutectic pistons. The 23-degree, Fast Burn aluminum heads enable tremendous power in the small-block V-8 because of a unique chamber design that quickly and completely burns all of the air/fuel mixture – giving you maximum power. With the CT400 racing engine under the hood of your Modified or Late Model, you'll put a "fast burn" on the competition.
    • Formerly sold as Chevrolet Performance 88958604
    • High-revving matched components
    • A fraction of the price of a custom engine
    • Sealed with IMCA-issued bolts and is approved for use in IMCA
    • Popular in Modified and Late Model classes*
    • 400 HP @ 5500 RPM
    • 400 ft. lbs. of torque @ 4500 RPM
    • 4.00" x 3.48" bore x stroke
    • 9.6:1 compression ratio
    • 92 octane recommended fuel
    • 4-bolt main caps
    • Cam lift: .474" intake / .510" exhaust
    • Cam duration @ .050": 208° intake / 221° exhaust
    • 112° lobe separation
    • 1.5:1 ratio aluminum roller rocker arms
    • 2.00" Intake / 1.55" Exhaust valves

    Includes:

    • Fully assembled long block
    • Black steel valve covers w/ breathers
    • Oil pump, pick-up, 8 quart oil pan
    • Eliminator Vortec intake manifold
    • Spark plugs
    • 8" harmonic balancer
    • Front timing cover
    • IMCA-approved seal kit
    *Check track/series rules for approved applications.
     

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  • GM Performance Replacement Valve Springs for Chevy 604 Engine, Set/16
    GM Performance Replacement Valve Springs for Chevy 604 Engine, Set/16
    (Part #35512495494)
    x
                Replace your worn out valve springs in your GM  604 engine with these quality steel replacement  springs.  They are GM Factory replacement and are sold as a complete set of 16. 
    • GM factory replacement 
    • Chevy 604 engines
    • 1.32" O.D.
    • 101 lbs @ 1.780" Seat Pressure
    • 332 lbs/in Spring Rate
    • 1.220" Coil Bind
    • Set of 16 single springs
  • GM 19258602 CT350 GM-Sealed 602 Chevy Crate Engine
    GM 19258602 CT350 GM-Sealed 602 Chevy Crate Engine
    (Part #35519258602)
    x
                Please view the product's page for more information
            
  • GM 19318604 CT400 IMCA-Sealed 604 Chevy Crate Engine
    GM 19318604 CT400 IMCA-Sealed 604 Chevy Crate Engine
    (Part #91019318604)
    x
                Please view the product's page for more information
            
  • GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine
    GM 19258602 CT350 IMCA-Sealed 602 Chevy Crate Engine
    (Part #91019258602)
    x
                Please view the product's page for more information
            
  • GM Performance 604 Crate Engine Retro Beehive Spring Update Kit
    GM Performance 604 Crate Engine Retro Beehive Spring Update Kit
    (Part #35519300952)
    x
                GM valve spring update kit.  Now you can update  your first generation 604 to the new legal Beehive springs.  Comes with  16 Beehive springs, 16 locators, 16 spring retainers, and 32 keepers.
    • Legal upgrade for your 604 crate engine
    • Includes:
      • (16) Beehive springs
      • (16) locators
      • (16) spring retainers
      • (32) valve keepers
  • GM Performance Replacement Valve Spring Retainer for Chevy 602 Engine
    GM Performance Replacement Valve Spring Retainer for Chevy 602 Engine
    (Part #35510241744)
    x
                Replace your worn out valve spring retainers in your GM  602 engine with  these  quality steel replacement retainers.  They are GM Factory  replacement and  are sold each. 
    • GM factory replacement 
    • Chevy 602 engines
    • Sold each
  • GM 19318604 CT400 GM-Sealed 604 Chevy Crate Engine
    GM 19318604 CT400 GM-Sealed 604 Chevy Crate Engine
    (Part #35519318604)
    x
                Please view the product's page for more information
            
  • GM Performance Replacement Valve Cover Gaskets, 602/604 Crate Engine
    GM Performance Replacement Valve Cover Gaskets, 602/604 Crate Engine
    (Part #35510046089)
    x
                Replace those old or leaking valve cover gaskets in your Chevy  602/604 engines with these  quality rubber replacement gaskets.  They are GM Factory replacement and  are sold each. 
    • GM factory replacement 
    • Chevy 602/604 crate engines
    • Sold each
  • GM Performance 19154761 602 Chevy Replacement Valve Springs, Set/16
    GM Performance 19154761 602 Chevy Replacement Valve Springs, Set/16
    (Part #35519154761)
    x
                Replace your worn out valve springs in your 1996 LT4 Corvette, ZZ4, GM 602 CT350/400 or ZZ383 engine with these quality steel replacement springs.  Sold as a complete set of 16. 
    • Set of 16 single springs
    • Outside diameter:  1.25"
    • Pressure @ installed height: 80# @ 1.70"
    • Solid height: 1.20"
    • Average Rate (lbs@in): 256
    • Genuine replacement part number 12495494 for 1996 LT4 Corvette, ZZ4, GM 602 CT350/400 and ZZ383 engines
    • Note: Catalog technical description update with correct specs as provided here.
  • GM Performance Replacement Valve Lock Keepers, 602/604 Engines, Set/32
    GM Performance Replacement Valve Lock Keepers, 602/604 Engines, Set/32
    (Part #35512495503)
    x
                Replace your worn out valve keepers in your GM  602 or 604 engine with these  quality steel replacement keepers.  They are GM Factory replacement and  are sold as a complete set of 32 pieces. 
    • Set of 32-piece split keepers
    • GM factory replacement 
    • Chevy 602/604 engines
  • GM Performance Replacement Valve Spring Retainers, Chevy 604, Set/16
    GM Performance Replacement Valve Spring Retainers, Chevy 604, Set/16
    (Part #35519171528)
    x
                Replace your worn out valve spring retainers in your GM  604 engine with these  quality steel replacement retainers.  They are GM Factory replacement and  are sold as a complete set of 16. 
    • Set of 16 single retainers
    • GM factory replacement 
    • Chevy 604 engines
  • Chevrolet Performance 602 GM Crate Engine Replacement Push Rod, Each
    Chevrolet Performance 602 GM Crate Engine Replacement Push Rod, Each
    (Part #35514095256)
    x
                

    These push rods are designed for use with GM Performance 602 crate engines. Stronger and more durable than normal, these rods are sure to not disappoint. Chevrolet Performance parts will serve you longer and will provide maximum safety and performance. Sold each.

    • 7.79" x 0.312"
    • 0.11 lbs.
    • Enhanced engineering features provide improved stability, reduced deflection, and constant column strength.
    • GM Performance 602 crate engines
    • Sold Each
  • GM Performance Replacement Push Rods for Chevy 604 Engine, Set/16
    GM Performance Replacement Push Rods for Chevy 604 Engine, Set/16
    (Part #35512371041)
    x
                Replace your worn out push rods in your GM 604 engine with  these  quality steel replacement push rods.  They are GM Factory  replacement and  are sold as a complete set of 16. 
    • Set of 16 push rods
    • GM factory replacement 
    • Chevy 604 engines
  • GM Performance 12499224 Replacement Beehive Valve Spring, 604 Engines
    GM Performance 12499224 Replacement Beehive Valve Spring, 604 Engines
    (Part #35512499224)
    x
                

    With a .570" maximum lift, these Beehive™ Valve Springs from GM Performance are replacements for our GM 604 Crate engine. They allow big block engines to turn more RPM too. The unique Beehive™ shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower and durability. The oval/multi-arc wire shape places the maximum area of the wire at the point of highest stress to handle valve train stress more efficiently and allow better heat dissipation for longer life. Because of the unique Beehive™ design, the valve train can handle more RPM and more aggressive cam profiles.

    • Beehive™ Valve Springs
    • Replacement for GM 604 Crate engine
    • 1.29" O.D.
    • 1.085" Coil Bind Height
    • 375 lbs./in. Spring Rate
    • 1.25" @ 295 lbs. pressure
    • 1.8" installed height at 90 lbs. pressure
    • Max Lift .570"
    • Set of 16

     

  • GM Performance 19210728 Chevy 604 Replacement Rocker Arm, Set/16
    GM Performance 19210728 Chevy 604 Replacement Rocker Arm, Set/16
    (Part #35519210728)
    x
                Replace your worn out rocker arms in your GM  604 engine with these  quality steel replacement arms.  They are GM Factory replacement and  are sold as a complete set of 16. 
    • GM factory replacement 
    • Chevy 604 crate engine
    • Includes lock nut
    • Set of 16
  • GM Performance 10089648 602 Chevy Replacement Rocker Arm
    GM Performance 10089648 602 Chevy Replacement Rocker Arm
    (Part #35510089648)
    x
                These replacement aluminum rocker arms for GM 602 crate engines feature a 1.5 ratio and come with the nut and ball.  They work with 3/8" studs.
    • 1.5 ratio rocker arm
    • Single service part for 3/8" stud
    • Rocker arm with nut and ball
    • Non-roller rocker arm style
    • Polylock rocker arm nut style
    • Self-Aligning
    • Genuine GM 602 replacement part number 10089648
    • Sold each