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Drillled Exhaust Question

14349 Views 27 Replies 12 Participants Last post by  Dewd
I bought a drilled exhaust from one of our members with the 4 half inch holes. Is that the optimal amount of holes, or drilling additional holes make them louder or deeper in sound? I have heard that some have 6 and even 8 holes. I wouldn't want to drill more if there is no benefit.
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I've been considering drilling out the center hole as well. I already drilled the 4 1/2 inch holes in each muffler plate and it definitely added some noise, but more of a loud flutter than the roar I'm looking for. My only concerns with doing the center hole is the baffle plate that is cut coming of inside the exhaust and any marring that will happen inside the pipe and eventually rusting. Anyone got any opinions on those issues?
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