Vibrant Performance Straight Tubing Coupler Reducer 0.200 in Thick Wall 3 in Inlet 3 1 2 in Outlet 4 1 2 in Long Silicone Black HRP6701F BLK Oldsmobile V8 58 79 CAGC5512 036 Oldsmobile V8 58 79 including applications requiring additional clearance for the temperature probe we recognized the need for an aftermarket solution to the problem of OE flexible couplings that were failing after several years of service on vehicles equipped with transverse mounted engines Vibrant Performance Aramid Reinforced Silicone Transition Hose Couplers feature High Temperature Resistant Aramid Reinforcement Fabric between each layer of silicone which allows for an impressive Operating Temperature Range of 75 Degrees F to 392 Degrees F ( 60 Degrees C to 200 Degrees C)