1964-1988 Chevy GMC LS1 LS2 LS3 LS6 LS7 Block Hugger Shorty Exhaust Header

Description Block Hugger style headers are to be used when there's insufficient space because of steering and cross member clearance issues. This LS series engine header has excellent quality and durability to improve vehicle performance. Our headers are tucked in tight due to narrow older frame clearance. They are perfect for tight-fit installations. Features Primary Tube Diameter: 1 5/8(41.3mm) Flange Thickness: 3/8 (9.5mm) Collector Diameter: 2.5 (63.5mm) Primary Tube Gauge: 16 Gauge Collector Attachment: 3-bolt flange Engine Type: LS1, LS2, LS3, LS6, LS7 Engines: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L 3 Bolts Collector Construction, collector Merge Spikes, gains over 20+ hp Shorty design for power gain from idle to mid-range RPM 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 Fitment LS1 LS2 LS3 LS6 LS7 Conversion Swap Headers (El Camino, Monte Carlo, GMC Sprint) 1960's, 1970's Chevrolet El Camino, Monte Carlo, and GMC Sprint 4.8L, 5.3L, 5.7L, 6.0L, 6.2L V8 Engines Only For LS series engine swaps only. These do not work on standard SBC or BBC. If using a larger 4L80E or older Turbo 350/400 transmission the bellhousing ears may need to be trimmed for proper clearance. ⚠️WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.