Right i just fitted a GT3 system from the cat back to my mk4 1.4 16v astra, its brilliant, it accelerates in 3rd and 4th now like it does in 2nd, with the airbbox mods i wudnt b surprised if the 0-60 time had dropped, well, i can feel it.
But **** me backwards its loud, i just want a way to knock the top off the noise cos it booms so much.
Could i add like a sport centre silencer, so the pipe from the cat back to the intermediate pipe is a silencer, but not as restrictive as the old one. . .
If you get what i mean, if so, what would be a good one to get, im not sure if they do sport silencers.