Copper exhaust gaskets are die cut and dead soft. Embossed port ridge for a perfect seal. Cure the "leaky header blues" with these copper exhaust gaskets. Constructed of the finest .041 copper material and will seal where most gaskets fail. Reusable. 1-3/8" tall x 1-1/8" wide. Overall Length: 16-3/8" Overall Height: 2-1/8" Thickness @ Port Seal: .095" Item DetailsS/BFits Ford, Square Port