3.75inch to 4inch Straight Reducer Coupler Black/Red

T04E T3/T4 V-BAND Turbocharger Turbo AR.50/63 with Internal Wastegate Bearing

Acura Integra + Civic B-Series Bolt-on Turbo Kit (chrome with red couplers)

3.25inch 3ply Straight Bellow Silicone Coupler Blue

3.75inch 3ply Straight Bellow Silicone Coupler Blue

3.75inch (12inch Long) Straight Coupler Red

3.75inch 3ply Straight Bellow Silicone Coupler Red

3.75inch 45 Degree Coupler Black/Red

3.75inch Straight Coupler Black/Red