SLP Performance - 08-10 Challenger 5.7 Hemi 1 3/4" Long-Tube Catalyst-Back Ceramic Coated System w/ High-Flow Cats Give your 2008-10 Dodge Challenger R/T 5.7L V8 HEMI that classic HEMI exhaust rumble and increased power/torque with SLP's 4-into-1 Long-Tube Header System. Headers are CNC Mandrel Bent Stainless Steel and feature 1-3/4" Equal-Length Primaries flowing into 3" Collectors and 3" High-Flow Cats. Ceramic Coated to keep heat in, exhaust velocity up, and under-hood temperatures down. All necessary installation instructions and hardware are included, backed by our Lifetime Warranty. SLP's Long-Tube Headers Feature: 4-into-1 Design w/3" Collectors, featuring 1-3/4" Equal-Length Primaries. 100% Stainless Steel construction. CNC Mandrel Bent to maximize flow. Polished Ceramic Coating (interior and exterior surfaces) to keep heat in, exhaust velocity up, and under-hood temperatures down. 3" High-Flow Catalytic Converters for unrestricted exhaust flow. Complete bolt-on installation (no cutting or welding required). Made in the U.S.A Covered by SLP's Performance Guarantee and Lifetime Warranty