Speedmaster Cast Aluminum Cylinder Head Big Block Chevy 454 w/Hydraulic Flat Tappet Cam
746-PCE281.2031
Product Q&A
View Now
| Ratings |
|---|
| Price |
| Brand |
Big Block Chevy - Assembled
Special Note: Camshaft and Lifters Not Included
- Intake Valve: 2.250"
- Exhaust Valve: 1.880"
- Sold as a pair
- Max Lift: .550"
- Coil Bind: .740"
- Intake Install: 130 lbs @ 1.8
- Exhaust Install: 130 lbs @ 1.8
- Closed Seat Pressure: 110 lbs
- Open Seat Pressure: 300 lbs
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Specifications:
is this a set or one head? for 1055.80 .description says heads quantity says 1 and are they Orval port or rectangular, thanks
is the valve stem diameter 11/32 or 3/8 on these heads?
I know Pro Comp initially used poor quality valves and springs in their pre-assembled heads. Has their quality improved? Would I be better off buying bare heads and building them from scratch? Engine is a 496 with a .575 lift flat tappet cam.
CAN YOU GET THESE HEADS WITH A HIGHER LIFT SPRINGS AND CAN YOU USE THE STOCK PUSH RODS AND PUSH ROD GUIDES.
Does PROCOMP have BBC heads for roller cam? Can these heads be made to work with roller camshaft?
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.