Aftermarket exhaust

[Finnegan]

Originally Posted by particlewave

If that's the case, it wasn't done right.

It does sound tame from inside the car, but definitely not from the outside. Have you heard my video?
How many holes were made and what size?

Yes, I was expecting significantly more sound! One hole one each side, each 1 3/8".

[particlewave]

Originally Posted by Finnegan

Yes, I was expecting significantly more sound! One hole one each side, each 1 3/8".

That gives you a cross section of about 1.7", which is where I was when I said it needed more.

A 2" bypass, like the stock PSE, has a cross section of 3.14" (double what you have) so you really should have done two 1 3/8" per side.

[tommy583]

Yeah the holes must not be big enough. Did they at least drill the holes all the way through the pipes? As you can see what I did in the internal bypass thread, two holes each side around 1 inch. Then I used a chisel to connect each hole. I can definitely hear the difference in the car with the windows up. With them open and the top down, big difference. Under a bridge or in a tunnel it is pure GT3 mode. My wife says she can hear me coming down the street at 30mph. If I get on it people always look. So I would say the mod works if done right.