1978 1983 G Body Crossmember T56 with Frame Extension RCG T56K data acquisition components ) 20 Title 4" X 49449 FBHB ) 20 Title 4" X 9" Oval XL Multi Chamber Outlet Type Offset Outlet Quantity 1 Muffler Type Multi Chamber Inlet Type Offset Inlet Quantity 1 Body Width (In 5 Volt Data Logging Inputs Yes Accepts Custom Tunes From CMR Yes Alerts and Records Yes Auto Dimming Screen Yes Brand DiabloSport Check Clear DTCs Yes Color Display Yes Color Touch Screen Display Yes Compressed Length yes Data Logging Yes Fuel Type Gas Height 4 Length 9 Year Make Model Submodel 1982 1983 Pontiac Bonneville 1978 1983 GMC Caballero 1978 1981 Buick Century 1978 1981 Oldsmobile Cutlass Calais 1980 1983 Oldsmobile Cutlass Cruiser 1978 1980 Oldsmobile Cutlass Salon 1978 1983 Oldsmobile Cutlass Supreme 1978 1983 Pontiac Grand Prix 1978 1981 Pontiac LeMans 1978 1983 Chevrolet Malibu 1978 1983 Chevrolet Monte Carlo 1978 1983 Buick Regal The GMTM is sold separately