415cc 18 Degree BBC Racing Cylinder Heads
$6950.00 per pair
AFR’s 457cc 18° Big Block Chevy cylinder heads are their best performing highest flowing heads in their BB Chevy lineup. They come standard with stainless steel 2.400 intake valves and 1.800 exhaust valves. Intake port is raised .500 with the valves rolled to 18° resulting in unparalleled under the curve flow numbers which also provides some of the best Nitrous or Power Adder Cylinders on the market today. Do not be fooled by just peak flow numbers, these Cylinder Heads work very well with Combustion chambers coming in at 90cc and the head is ideal for 540CI up to 632ci larger race engines. The larger combustion chamber is idea for up to 1000 hp of power with Two Stages of NOS to really make insane power.
Heads require specific pistons, valves covers, shaft mount rockers and readily available intake manifolds. AFR offers a wide range of options and upgrades for this head like titanium valves and Copper seats
Components
- A356 Aluminum Castings
- 100% CNC Ported Intake, Exhaust and Combustion Chambers
- Bronze Alloy 11/32″ Valve Guides
- Multi Angle Rolled Radius 2.400/1.800 Valve Job
- Flow 498/342 @.900″ 4.625 Bore 2-1/8 Tube ¾ Radius Tube
- 90cc Combustion Chambers
- 2.400 Intake and 1.800 Tulip Exhaust Stainless Steel Valves
- PAC 1258 1.645″ .950″ Lift 350lb Triple Solid Roller Valve Springs
- 10° 11/32″ Bead Lock Valve Keepers with recess Lash Caps
- Valve Spring Seat Cups, PC Seals
- ARP Intake and Exhaust 7/16 Rocker Studs
- Adjustable 3/8 Guide Plates
OPTIONS
Titanium Intake Valves
+ $875.00
Inconel Exhaust Valves
+ $125.00
Titanium Exhaust
+ $875.00
Copper Beryllium Seats
+ $325.00
235-4713 ARP Head Bolt Kit
+ $305.00
AFR 4901 or 4902 Intake Manifold
+ $670.00
KPS-441172 1.80 Ratio Shaft Rockers
+ $2450.00