Fits 1955-1991 Chevrolet 262-400 Gen I Small Block. Rectangular Ports Gm Diesel " HP Tuners uses a credit-based

HP Tuners uses a credit-based licensing system

Ride Smoothly with Factory Precision: Experience a ride that feels as smooth as stock with features engineered to retain factory quality

Finish Machined Dark Tint

Standard Output models outperform the outgoing Hemi by a large margin

Fits 1955-1991 Chevrolet 262-400 Gen I Small Block. Rectangular Ports Gm Diesel " HP Tuners uses a credit-basedMr. Gasket CopperSEAL Header Gaskets are a high quality copper gasket that performs extremely well and are reusable. We recommend this in all racing and high performance applications. They are for stock heads unless indicated, and work well in high heat and turbocharged applications.