These Certified Automotive Experts LS swap long tube headers are designed for classic GM truck platforms where accurate fitment and real-world installation details matter. This polished stainless version of our CAE-032 design uses proven geometry tested on our own vehicles and refined for reliable clearance in both 2WD and 4WD configurations. Constructed from natural 304 stainless steel with a polished finish, these headers feature mandrel-bent 1-3/4 inch primary tubes, precision TIG welds, and CNC-machined flanges. The formed 3 inch merge collector terminates without a flange, allowing flexibility for custom exhaust fabrication while maintaining consistent alignment. This set includes upgraded factory-style multi-layer steel header gaskets and a complete 12-piece header bolt set, providing a more complete installation solution compared to headers sold without sealing or mounting hardware. O2 sensor bungs are integrated into both headers. These headers are intended for LS-series engine swap applications only and are not compatible with SBC or BBC engines. Due to header routing, factory spark plug wires and heat shields are not compatible; quality aftermarket spark plug wires are recommended. Based on our test vehicle, Tejas Performance LS swap engine mounts and crossmembers are strongly recommended for best fitment and clearance. A detailed fitment and clearance video is included with the listing images to help customers understand installation requirements and confirm compatibility prior to purchase. Vehicle Application Summary Designed for LS swap applications in 1960–1987 Chevrolet and GMC C10 K10 trucks and 1988–1991 square-body Blazer, Jimmy, and Suburban platforms. Not compatible with OBS or GMT400 chassis and not intended for Gen V LT engines.