COMPATIBILITY – Fits 1988-1993 Chevrolet C1500; 1988-1993 Chevrolet C2500; 1988-1993 Chevrolet K1500; 1988-1993 Chevrolet K2500; 1988-1993 GMC C1500; 1988-1993 GMC C2500; 1988-1993 GMC K1500; 1988-1993 GMC K2500 GET THE RIGHT PART -- Before purchasing, research to ensure that the part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes Large internal flow tubes improve exhaust flow and reduce backpressure Exclusive patented flow director design channels exhaust flow and eliminates turbulence on most applications Fiberglass matting technology to absorb unwanted interior resonance while maintaining a mellow performance tone Dyno proven to flow up to 700 SCFM