1 Million-Mile Warranty on all silicone products! These are perfect for finishing off your turbo, intercooler, supercharger or custom intake installation. These are the highest quality silicone connectors you can buy. These are specifically design for turbocharged or supercharged applications, and feature a super slick glossy surface that is easy to wipe clean for that show quality look. 3 ply reinforced construction. 3" to 4" 90's are 4 ply, great for oval throttle bodys on Ford and Chevy V8's! Demand the best! Made in the USA.