P2R J Series Exhaust Manifold Flanges are 3/8 inch thick and made out of stainless steel.These flanges can be used to make custom headers, and turbo manifolds. 

Fits the following cylinder heads: J30A1, J32A1, J32A2, J35A1, J35A2, J35A3 & J35A4. 

Sold per piece