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My cousin did this to his zr 500 efi and so far it hasn't blown up. He's run it for a year so far and its way too annoying. A loud pipe is nice but straight pipe is just plain annoying. I doesn't sound nearly like a nicely tuned aftermarket pipe. I'm surprised my cousin can still hear so if you want to blow your ear drums go ahead it probly wont hurt ur engine but its just plain too loud for me. >Just my opinion<
 
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