Straight Through Design, Reduce Engine Noise. Deep Tone Performance Resonator. Made by high quality stainless steel for long-lasting durability. NOTICE:No Installation Guide.Welding Is Required. Professional Installation Is Highly Recommend. Condition: New Finish: Polished Tip Shape: Round Straight Cut Manufacturer Part Number: 254009 Inlet Type: Single Interchange Part Number: 2.5 inch inlet Universal Resonator Fitment Type: Performance/Custom Outlet Type: Single Connection Type: UPC: 797805221593 Item Good Performance Guaranteed. Stainless Steel construction for lifelong protection. SPEC: Material: Stainless Steel Inlet Diameter: 2.5 inch Outlet Diameter: 2.5 inch Body Length: 8.5 inch Overall Length: 12 inch Muffler Type: Straight Through Finished: Polished Type: Round Straight Cut Installation: Color: Silver Package Contents: 4 x Car Exhaust muffler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.