3" inlet & outlet, 16" Overall Length Performance Resonator. Straight Throught Design, Deep Tone Muffler. Reduce Engine Noise. Stainless steel construction for lifelong protection. Surface Finish: Polished & Tig Welding Welding Is Required. Professional Installation Is Highly Recommend. NOTICE: 3" Inlet & outlet, Pls Check The Size Before Order. Package Content: 1 pc 3" Inlet Universal Muffler . SPEC Inlet:3" Outlet:3" Overall Length:16" Material: Stainless Steel Surface Finished: Polished Type: Straight Through Design Tip Installation: Weld-On Features: Straight Through Design, Deep Tone, Reduce Noise. Weld-on Installation Type. Professional installation is recommended. Made by High Quality Stainlees Steel for long-lasting durability.