End Rail Spacer Kit BBC Tall Deck w/RP Heads

The DART End Rail Spacer Kit BBC Tall Deck with RP Heads is a precision intake manifold spacer designed for big-block Chevrolet engines running tall-deck cylinder heads with rectangular port configuration. This pair of aluminum spacers maintains proper deck height geometry and ensures correct fuel mixture distribution across the intake runners, critical for maximizing horsepower and drivability in high-performance engine builds.

Manufactured from aluminum in natural finish, these spacers measure 10.200 inches in deck height—the specification that distinguishes tall-deck applications from standard configurations. The rectangular port design (RP) is engineered to match DART's RP cylinder head profiles, ensuring flush intake gasket sealing and eliminating air leaks that compromise combustion efficiency. Proper spacer selection is essential; mismatched deck heights introduce runner misalignment and fuel distribution problems that degrade performance across the RPM range.

This kit is intended for engine builders and serious enthusiasts constructing big-block Chevrolet engines with tall-deck blocks and DART RP cylinder heads. Whether assembling a street performance motor, dedicated track engine, or restoration build, selecting the correct spacer height is non-negotiable—it determines whether the intake manifold seats properly and feeds fuel evenly to all cylinders. The pair format allows installation on both intake runners for symmetrical flow characteristics.

DART is recognized in the performance engine community for precision cylinder head and intake manifold products. When specifying spacer components, part-number accuracy is paramount—tall-deck applications require tall-deck spacers, and rectangular port heads demand RP-matched components. Verify your engine's deck height and cylinder head port type before purchase to ensure proper fit and function.