Top Mount Manifold with T25 flange Stainless construction with 1/2in Mild Steel Head flange for expansion control. All flanges milled flat after welding for perfect sealing. Will need special down-pipe and associate plumbing. Will fit Gt28RS, Gt2871R and Gt3071R with up to a 2.75in compressor inlet. This gives ~340-500whp capability. For 900 9-3 94-02 Custom Made Requires extra Lead time. Hardware Kit only available for install at Taliaferro.