Youtuber ChrisSadowski’s video about SPELAB N1 Universal 2.5″ Inlet 4″ Outlet Performance Exhaust Muffler Universal Fit – Most cars with straight exit mufflers with 2.5″ piping. And it’s easy to install, bolts on in minutes. You can choose Butt joint, Lap joint, or muffler seal clamp, U bolt clamp. Size and Material – Polished stainless steel, 2.5″ inlet, 4.0″ outlet, 18.6″ length just need to measure the inlet of your car before purchase. High Quality – SPELAB Muffler is made of two layers of stainless steel and premium sound-absorbing cotton, which help reduce vibration and absorb sound for long-lasting durability. Decorate Your Car- SPELAB Muffler has a burnt blue tip that adds an aesthetic focal point to the rear of the vehicle. Warranty – We provide a 3-month warranty. If you have any questions, please do not hesitate to contact us, we will reply you within 24 hours.