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On the stock muffler if you cut it off can you see straight thru it or would you have to drill it out so that you can see straight thru? I ask this because my buddy wants to straight pipe his dmax but a muffler has to be on to pass safety so he wants to put a 3.5" pipe thru the stock muffler an then reweld it back on, is this possible or do you need to drill it out first?
 

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Just buy an exhaust kit with muffler. You will have to bore out the OEM muffler. Will sound better and will still have a muffler. A straight pipe will be loud and I assume he wouldn't pass safety then.


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