Hello evryone i need your help. Last year at dubfest. A vrs drove past me and made a swoushing sound from the tail pipe. When i asked how it was done i was told a decat straigjt fru to a tip should do it. Did this the other day and my god u can hear the turbo (like a plane taking off!) but i cant get it to make this noise. Car has been mapped by shark. If any one can help me ad realy appreciate it.

Cheers stu

Hi could have been a dump valve that made the noise as you can get dump valves that make all sorts of sounds

If it sounded something between a cat sneezing and a bus stopping then it was a DV, nothing at all to do with the exhaust.

Or, if it was more a cross between a pigeon & an owl, you really need a decat & increase in exhaust bore size.

I got a Milltek turboback with Decat and I am now in love with the sound.