Made Of Lightweight Aluminum Cnc Machined From 6061 T-6 Aluminum. 1 Inch Muffler Tip For Better Effect (Oem Muffler). Install On Aftermarket Muffler, Catback, Axleback Muffler It Will Not Make Any Sound. Easy Installation And Universal Fits Most Cars With Straight Oem Muffler Exhaust, Not Suitable For Angled Muffler