Build your custom exhaust system, swap out your muffler, or adapt your tailpipe for a different tip size with Silverline DCK5 Exhaust Adapter. Featuring a T409 stainless steel construction, the DCK5 adapter features a 4" I.D. and a 5" O.D. so you can adapt your exhaust from 4"-5". Features: 4" I.D. x 5" O.D. 6" Overall T409 Stainless Steel Construction (Non-Polished) Warranty: ANSA Exhaust Technologies warrants to the original retail purchaser that each Silverline exhaust component purchased from an authorized ANSA dealer shall be free from defects in material and workmanship for 1 Year, when used on private passenger cars and light trucks for personal use under normal operating conditions. The warranty commences on the date of the original purchase and is effective for the duration listed below, or for as long as the original purchaser owns the vehicle, whichever comes first.