Dart IMCA Stock Car Budget SBC Cylinder Heads/Gaskets/Bolts Kit

Kit Includes:

• (2) Dart IMCA Stock Car Cast Iron Small Block Chevy Cylinder Head
• (2) Speedway Small Block Chevy 400 Head Gaskets, 4.165 Inch Bore
• (1) Speedway Small Block Chevy V8 Cylinder Head Bolt Set, Small Head
• (1) Speedway Small Block Chevy Intake Gasket Set, 1204 Style, Standard
• (1) Speedway Extreme Gasket Set, SB Chevy, 1-5/8 In Rectangular Port
• (1) Speedway Small Block Chevy Valve Cover Gasket Set, Extra Thick
• (1) Spectre 46523 Intake Bolt Kit, 12-Point, Small Block Chevy/Chrysler

IMCA Approved Stock Replacement Cylinder Heads

• Dart IMCA Approved cast iron Small Block Chevy cylinder heads
• Approved stock replacement heads for Stock Car classes (using the 500 carbuertor)
• Begins with a Dart 10024360 Iron Eagle S/S 165 casting
• Engraved and serial-numbered to conform to IMCA rules
• Precision cast ports and chambers, they have outstanding air flow. Optimized valve sizes for maximum performance within IMCA rules.
• Assembled heads include:
  • High-performance springs
  • 1.94"/1.50" standard length stainless steel valves
  • 7 degree locks
  • Steel retainers
  • 3-angle valve jobs 
• Stock Car versions includes high-performance COMP Cams valve springs and handle 0.550" net valve lift, with Ferrea tool steel retainers
• Stock Car versions are .080" max flat milled w/ intake surface corrected to max out the compression rule for the IMCA Stock Car
• Approved for IMCA Stock Car classes (using 500 carb) as of 4/27/2020
• Assembled heads take approximately 1-2 days for assembly and will be shipped out promptly afterward

Cylinder Head Gaskets, 4.165 Inch Bore

• Steel head gaskets
• Premium materials to ensure a positive seal on any race or street engine
• 4.165" bore steel shim (.024)
• Does not have steam holes

Cylinder Head Bolt Set, Small Head

• 34-piece complete bolt set
• OEM-quality Class 12.9 cylinder SBC head bolt set (does both heads)
• Cheap insurance to prevent downtime in the shop
• For use with cast iron cylinder heads (without washers)
• Stock Chevrolet bolt length
• 1/2” hex head (undersized)
• 140,000 PSI proof load, 159,500 PSI yield strength, 176,900 PSI tensile strength
• Threads are coated with sealant
• Set contains 34 bolts (does 1 engine)

Intake Gasket Set, 1204 Style, Standard

• High-performance intake manifold gaskets for 265-400 SB Chevy V8 engines
• No end seals - use silicone gasket maker
• Heat crossover port is blocked
• 1204 style, 1.23" x 1.99"

Exhaust Gasket Set, 1-5/8 In Rectangular Port

• Reusable triple-layer exhaust gasket
• Stainless steel with a heat-resistant, rubber-based inner core
• 0.085” thick, ultra pliable
• Available for many popular flange configurations
• Easily conforms to surface irregularities to create a tight, leak-proof seal
• Works well with a wide range of flange surfaces and block and head materials

Valve Cover Gasket Set, Extra Thick

• Durable small block Chevy cork valve cover gaskets will work on any street or race engine
• Features a 5/16" extra thick cork/neoprene blend

Spectre 46523 Intake Bolt Kit, 12-Point

Material: Cast Iron

Comb Chambers: 64cc

Intake Valve Dia: 1.940"

Intake Port volume: 165cc

Intake Port Dim: 1.100" W x 1.925" H

Int Port Location: Stock

Exh Valve Dia.: 1.500"

Exh Port volume: 65cc

Exhaust Port Dim: 1.340" W x 1.300" H

Exh Port Location: Stock location & bolt pattern

Flow, Intake: 210 cfm @ .500" lift / 28"

Flow, Exhaust: 138 cfm @ .500" lift / 28"

Head bolts: Stock bolts can be used

Milling: Min. 62cc = .060" (.0065" = 1cc) Flat Mill

Pistons: Most 23° aftermarket pistons.

Push Rod length: Stock (Stock length = 7.800") * Must measure *

Push Rod Guide: Stock type, integral

Retainers: Steel 1.250" = (7° )

Rocker Arm stud: Use screw-in stud w/integral nut

Spark Plug: Straight, .460" reach, tapered seat

Spring Cups: N/A, Use hardened shim or locator

Spring Pockets: Cut for 1.250" OD (.030" deeper max)

Valve Angles: 23°

Valve Length: STD = 4.890"

Valve Stem Dia: .3415" - 11/32"

Valve Guides: Integral cast into head

Valve Guide clearance: .002" - .0025" (with .3415 dia. valve stem)

Valve Guide Spacing: 1.890" moved .030" from stock

Valve Seals: Cut for umbrella seals

Valve Seats: Exh = Powdered Metal, .006" press

Valve Seat dim: Exh - 1.650" x 1.280" x .350"

Valve Seat angles:

• Int = 32° - 45° - 60° - 70°- 80°
• Exh = 37° - 45° - radius

Torque Specs:

• Head Bolts = 70 ft/lb (w/ oil)
• Rocker Studs = 55 ft/lb
• Manifold = 35 ft/lb

Block Use: Any SBC, Iron or Aluminum

Weight: 58 lbs Assembled

Spectre Warranty Information (PDF)