Diesel Exhaust Stamped Y Pipe 4.00" Diameter Single Inlet to 4.00" Diameter Dual Outlets WSYP400-400 Wesdon Exhaust Stamped Y Pipe Diesel Stamped HEAVY 16 GAGE 4.00 DIA SINGLE INLET DUAL 4.00 OUTLETS BY OAL 13.00 INCH LENGTH Y PIPE Add an Y pipe to Create dual exhausts to help Exhaust Faster and Better tone Reduces Interior Resonance Compact design for Ease of Installation Increases Torque throughout the RPM range, eliminating back-rap Mellows the Tone both inside & outside the vehicle Add an Y pipe to CREATE dual exhausts Diesel Diesel Single to Dual Conversion Y Pipe Steel Aluminized