Pontiac - Assembled
Speedmaster PCE281.2168 Features:
Speedmaster Pontiac heads include valve sizes at 2.11" Intake, and 1.66" While the 2.11" valves are standard issue, the valve seat can be machined to accept a larger valve with minimal work. Combustion chambers are exact in volume - so every cylinder has the same compression ratio. Each port is the same cross-section - so every cylinder can reach a higher true RPM potential.
- Recommend Felpro #10171. (4.540 Bore) or Fel Pro#1016 (4.300 Bore) head gasket
- Manufactured with the Ram Air IV pattern which requires Felpro #1233 gaskets
- Please measure for exact pushrod length once heads and rockers are fully installed. Deck machining, head gasket thickness, and rocker arm style will all affect pushrod height.
- All Speedmaster Pontiac heads use standard 14mm. x 750" reach, 5/8 hex, gasket seat sparkplugs like NGK R5671A-7, Autolite 3924, Champion RC12YC, etc. Remember that higher compression/ boost requires a colder heat range sparkplug
- Utilizes standard Ram Air Iv head bolts or studs. The ARP head bolt part number is 190-3605
- Recommend the use of Edelbrock exhaust gaskets #7281
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.
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Specifications:
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.