Mishimoto MMHOSE-C4-92TBK Audi S4/S6 C4 Turbo Silicone Hose Kit, 1992-1997, Black Direct fit for 19921997 Audi S4/S6 C4 INNER DIAMETER: Hose 1: 0.92", 1.90", & 2.66" Hose 2: 0.71", 2.24", & 2.72" Hose 3: 2.32" & 2.75" OUTER DIAMETER Hose 1: 1.32", 2.30", & 3.06" Hose 2: 1.01", 2.64", & 3.12" Hose 3: 2.72" & 3.15" High grade silicone and heat-resistant embedded fibers feature max temp of 330F Mishimoto Lifetime Warranty