Product details:

Painted Long Tube HeadersSmall Block Chevy 265-4001966-1972 1/2 & 3/4 TonBlazer/Jimmy: 1967-1989 2WD & 1969-1991 4WD1973-1987 All1973-1991 Suburban 2WD/4WD1988-1991 1-Ton Crew Cab 2WD/4WD1-1/2 inch Primary, 3 inch Collector Headers Include2.5 inch ReducersMust modify stock exhaust to retain catalytic converter(s). Applications with oxygen sensor will require purchase of reducers with O2 fittings. Will not fit with A.I.R. pump. Will not fit angle plug heads. Pre-70 vehicles with exhaust mounted alternator/generator will require purchase of 555-30780 bracket. May require clutch linkage modifications. Installation on vehicles 78 and earlier with air conditioning will require purchase of 555-30782 bracket. 79 and later vehicles equipped with short compressor will re-use the original bracket.AutomaticStandardColumnFloorColumnFloorYesNoNoYes