DIY Exhaust Mod – Gain of 10+ HP!!!

[JAAY]

Now someone needs to get the angle and get 2 1" holes (25mm) in that middle pipe. If my car wasn't behind 2 ft. of snow I would do it.

[jdlmodelt]

Originally Posted by JAAY

Now someone needs to get the angle and get 2 1" holes (25mm) in that middle pipe. If my car wasn't behind 2 ft. of snow I would do it.

I just drilled 3/8 holes in my tail pipe and couldn't tell the difference. My factory exhaust has always sounded like a Honda Civic from the driver's seat. Are my CATs plugged?

[chipmunk]

3/8 will be fairly quiet, however you should hear it when you start and at idle. You need to go a bit bigger to get an overall increase in sound. Just be careful going too big. Read the previous reports that I have given regarding the drone you may get at 1".