Thread: DIY Exhaust Mod – Gain of 10+ HP!!!
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Old 01-24-2014, 01:59 PM   #209
particlewave
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I went on an upward angle and found it much easier.

As you can see, the 10" punch was more than long enough.

EDIT: my holes are 7/16", not 9/16". Definitely going to go a bit bigger before spring
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Last edited by particlewave; 01-24-2014 at 02:22 PM.
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