how do i make my 1986 gmc high sierra pickup louder?

josh

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i want to make it the loudest it can be but still have it legal and not cost me a fortune
 
Drill holes in your muffler or get a new muffler...loud doesn't = good though
 
dont drill holes that will ruine your tail pipe go buy a cherry bomb from Schuck's and gut off the muffler at the back and replace it with your new cherry and if thats to loud for ya try just running strait pipes out from your catilatic converter all the way out.
 


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