This is a SET of Rebuilt OE Stock 350 / 400 / 455 Pontiac Cylinder Head Assemblies.
* Part # : 4X
* Description : Stock 350 / 400 / 455 Cylinder Heads
* Note : Surfaced, Pressure Tested, Valve Job
Remanufacturing Process Includes:
- Complete disassembly and thorough cleaning via hot tank & pressure tested to confirm casting integrity
- New valve seats installed as necessary
- New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary.
- Valve job Performed with all required angles & vacuum tested seals to ensure perfect compression.
- PCD milled to ensure a super smooth finish. (PCD stands for Polycrystalline Diamond, and is best for aluminum heads).
- CBN milled to ensure a super smooth finish. (CBN stands for Cubic Boron Nitride and is best for cast-iron heads).
- All necessary parts are cleaned and inspected before final assembly to meet AERA specifications
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