Interesting rear silencer, I bought it for my VW Golf GTI. I would NOT recommend using this on a naturally aspirated car as the turbo helps keep the exhaust noise from being incredibly high pitched and mosquito-like. When I first put the muffler on, it wasn't very loud. After about 2 months of use everything has changed, the packaging material used in the muffler rotted/burst and the muffler became much louder. Remember that this is very long double glazing and will never be as noisy as a short one. In my opinion, this is a good muffler for certain vehicles. Plus, it's incredibly cheap. So if you have a turbocharged 4 cylinder car and want it to be a bit louder but have a deep (as deep as a 4 cylinder can get) rumble I would definitely recommend this muffler.