jpipe

Hi everyone, i recently bought an sv6 VF commodore sedan not too long ago, and it has the stock exhausts on it, i want my car to be louder but not too loud to where i will gain attention from cops.. I wanted a noise like the straight pipes with hot dogs but didnt want it that loud, and was...

so I recently got a new 2 1/2 inch cat back system with a set of J pipes on my ve ss. They sound awesome on idle and for general cruising but as soon as I get into the high revs and put a heavy load on it, it seems to make an awful whistle sound (sounds a bit like a flute or recorder or...