How to Install the exhaust Tip? Note: Please Measure the size of your Tail Pipe Before purchase, the outlet size of the tailpipe should match the inlet size of this Exhaust Tip. Exhaust Tip Description: Features corrosion resistance to alkali solution and most organic and inorganic acids.Repeated polishing processing, bright as a mirror, highlighting the noble quality. Exhaust Tip Features: Inlet Diameter: 2.5"Outlet Diameter: 4"Overall Length: 9"Installation: Weld OnStyle: Single Layer-Slant CutMaterial: 304 Stainless steel Package Included: 2Stainless Steel Exhaust Tips Step 1: Cleaning the Tailpipe Clean off the tailpipe and exhaust tip with penetrating oil and a shop rag.Make sure your tailpipe is at room temperature, and do not clean the surface of the tailpipe after the car just went out Step 2: Sliding the Tip On Try to slide the tip onto the exhaust pipe. You will probably meet some resistance, so use automotive grease to lubricate the pieces if necessary. Cover the end of the exhaust tip with a towel and tap it into a place with a rubber mallet. Step 3: Weld the Tip weld a joint between the edges of the tailpipe and the exhaust tip to finish the installation. Read more