Percys 68090 XX Carbon Header Flange Gaskets Fits 11-17 F-150 MustangCategory: Percys Xx CarbonExhaust Header GasketXX Carbon Header Flange GasketsXX Carbon Header Flange Gaskets; Round; 1.90 in.;FEATURES:Limited Lifetime Replacement Warranty,Withstands Long Term Exposure To Over 2000 Degrees,Offers Superior Sealing Even On The Worst Surfaces,Perfect For Even Nitrous/Turbo/Blower Motors,Percy's High Performance - A Product Line of Taylor Cable Products Inc. was started in 1995 by racers for racers, with a vision of developing unique, problem solving products for the racing and high performance automotive aftermarket. Since then Percy's has developed many products that have done just that. Percy's has patents on most of the products that we make and continue to lead the way in cutting edge technology and new concepts. All Percy's products are proudly made right here in the USA, and most parts are made right in house by people that care about our customers.