Discussion Starter · #1 ·
I did 4 1/2" holes in the exhaust at 12,3,6,9. Ran that for about 2 months, love it but wanted more. then 2 days ago, i drilled the center baffle plate out with the 1inch hole saw bit. Now when i left off the throttle, when im reving in low RPMS it makes a whistle note. has anyone else experienced this after drilling out the center?