ALTEN PERFORMANCE-GROUP A-MT140-A:main body's length:30cm(11.81''), main body's width:12cm(4.72''), tailpipe's length:20cm(7.87''), tailpipe's width:7.5cm(2.95''), entrance's diameter:5.3cm(2.09'') The ALTEN Hi-Power Titanium Burn Tip Exhaust Muffler Are Well-Known For Quality, Stylish & Performance. This Muffler Will Improve Up To 10 HP, Universal Design For Most Of The Car With Straight Exit Muffler. It's made by T-304 Stainless Steel, With Computer Tig Welding And Polish Finish. It's Light Weight Design Make It Much Lighter Than Factory Muffler. It Also Produce Racing Deep Note Sound. Comes With Adjustable Silencer To Adjust The Racing Tone. Weld On Installation Required. 100% Brand New In Box & Ready to Ship Same As The Pictures Shown, Performance Guarantee !!!