Check the listing for details. FAPO Block Hugger Headers for LS Conversion Swap Camaro Chevelle Nova Firebird. Color: Silver, Condition: New. Listed at 159.99 USD. Application: compatible withLS1 LS2 LS3 LS6 LS7 Conversion Swap Headers (Camaro, Chevelle, Nova, Firebird) 1960's, 1970's Camaro, Chevelle, Nova, Firebird 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.*Our headers are tucked in tight due to narrow older frame clearance. *They are perfect for tight-fit installations. Features: -Block Hugger style headers are to be used when there's no enough space because of steering and cross member clearance issues -3 Bolts Collector Construction, collector Merge Spikes, gains over 20+ hp-Excellent quality and durability to improve vehicle performance-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-The accessories in the photos are included-1 year warranty for any manufacturing defectTechnical Specifications:Header Type: Short Tube Block Hugger HeaderPrimary Diameter: 1-5/8 in.Collector Diameter: 2-1/2 in. Head Flange Thickness：3/8 in. (9.5mm)Pipe Thickness: 16 gauge (1.5mm)Material: 304 Stainless SteelFinish: Polished