SBC .500in End Rail Spac Kit

The Peterson Fluid SBC .500in End Rail Spacer Kit (Part No. 09-1064) is a precision manifold end seal spacer engineered for small block Chevy engine builders and performance machine shops. This aluminum spacer kit maintains critical clearances between the manifold and engine block, ensuring proper sealing and preventing coolant or oil bypass at the manifold mounting surface. Built from natural aluminum with roll pin fastening, the kit delivers the dimensional accuracy required for high-performance and competition engine builds where seal integrity directly impacts reliability.

The .500-inch thickness specification is engineered to compensate for manufacturing tolerances and port head variations across SBC engine blocks and aftermarket cylinder head combinations. The raised port head design accommodates modern head designs with larger port openings, while the aluminum construction keeps weight minimal—critical for performance applications where every fraction of a pound affects power-to-weight ratios. Roll pin engagement ensures repeatable clamping force without stress concentration at bolt holes, reducing the risk of manifold fastener loosening during thermal cycling or aggressive throttle transitions.

This kit is essential for engine rebuilders, performance machine shops, and serious enthusiasts assembling or reassembling small block Chevy powerplants for street, strip, or marine use. It addresses a common pain point: manifold creep and subsequent coolant seepage when OEM manifolds are reinstalled on bored or decked blocks. The Peterson Fluid SBC spacer kit eliminates guesswork and eliminates the need for improvised shims, delivering documented dimensional accuracy for repeatability across multiple builds.

Peterson Fluid Systems has established itself as a trusted supplier of precision cooling and manifold components to the engine building and automotive restoration community. The SBC .500-inch spacer kit represents the kind of engineered detail that separates professional-grade engine work from shortcuts—proper manifold sealing is non-negotiable in any build targeting longevity and performance consistency.