Purchase instructions Professional installation is highly recommended, exhaust systems are not always perfect, and while most of the time these exhaust systems work perfectly together, occasionally a slight modification to the exhaust system is required to achieve a perfect fit. Specifications: Header Type: Long Tube / Full Length Primary Diameter: 1-3/4 in. Collector Diameter: 3 in. (76mm) Head Flange Thickness:3/8 in. (9.5mm) Pipe Thickness: 16 gauge (1.5mm) Material: 304 Stainless Steel Finish: Polished Features: Excellent quality and durability to improve vehicle performance, gains over 25+ rwhp Full length design for power gain from mid to high RPM range Fully mandrel bent tubes made of high quality 16-gauge 304 stainless steel Head flanges laser-cut from high quality 3/8-inch thick steel plates The flange is flattened by a hydraulic press for precise and leak free sealing All joints are golden color TIG brass style welded to prevent cracking and wear Flanges chrome plated for corrosion resistance Polished surface for extra protection against rusting The accessories in the photos are included Fitment: LS motor swap on 60-98 Chevy/GMC trucks (2WD) LS based engines (LS1, LS2, LS3, LS6, LS7, etc.) 4.8L, 5.3L, 5.7L, 6.0L, 6.2L V8 Engines Only 1964-1977 Chevrolet Chevelle 1964 -1988 Chevrolet El Camino 1970-1988 Chevrolet Monte Carlo 1964-1988 Pontiac Lemans 1964-1977 Pontiac GTO 1977-1988 Pontiac Grand Prix 1964-1977 Oldsmobile Cutlass 1964-1972 Buick Skylark 1978-1988 Buick Grand National 1978-1988 Chevrolet Malibu Package included: 1x Header Exhaust System with gaskets Just as pictures shown Important: Will NOT fit LS4 engines Will NOT work on 4WD/4x4 models Will NOT work on standard SBC or BBC Will NOT install with factory column shift linkage May require special motor mounts for clearance May require angled spark plug boots for tight clearance If using larger 4L80E or older THM 350/400 automatic transmissions the bellhousing ears may need to be trimmed for proper clearance
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