The aFe Universal fit 409 Stainless Steel Performance Muffler is designed to provide a deep, throaty, powerful sound on acceleration but maintain a smooth sound at idle. This muffler is constructed of brushed finished 409 stainless steel and uses a straight through perforated core with heat resistant packing to reduce backpressure and maximize exhaust flow.? You will see increased performance and improved throttle response over the factory exhaust. Muffler Specifications: 2-1/2" In/Out, Center/Offset 14"L x 9"W x 4"H