Pontiac 400 455 Ram Air IV Hyd FT Cylinder Head Top End Engine Combo Kit Although the GM heads are

Although the GM heads are good pieces

Kits include: Fully assembled aluminum cylinder heads

The Speedmaster aluminum pinion supports are completely CNC machined from our designed forgings or billet 6061-T6

highly specialized silicone magnetic steel cores

The OEM replacements get harder to find as time goes on

Pontiac 400 455 Ram Air IV Hyd FT Cylinder Head Top End Engine Combo Kit Although the GM heads areDon't spend hours figuring out which pieces and parts you need to get what you want from your engine. Speedmaster has already done the work for you; our Top End engine kits will save you the time and hassle of mixing and matching components yourself. These kits are specifically designed to deliver the performance you want, at a better price than purchasing the parts separately.