1966-1974 Chevy/GMC 1/2 & 3/4 & 1-Ton 2WD & 4WD, 1967-1974 Blazer/Jimmy 2WD, 66-1972 Blazer/Jimmy K5/Suburban 4WD, 73-1974 Blazer/Jimmy K5/Suburban 2WD & 4WD: 283-400, Tube Size 1.5 in., Collector Size 3 in.; Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16 in. flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance.;
Fuel Economy From The Engine Leak Test For Max Performance Mandrel-Formed Power Plenum Leakproof O-Ringed Port Seals Include All Mounting Hardware Construced of .049 cold roll flash mild steel tubing Precision engineered for fit, performance and economy Works with factory power steering and power brakes
