I have a Hall big bore system that came on the car. It sounds great, but I have contemplated cutting off at the collector and rewelding on a larger 2 1/2" or even 3" pipe (if it would fit) between the collector and tips. I was told opening up the collectors can be good for up to 30HP as the Hall ones are too restrictive. Would be glad to hear how tight the 2 1/2" fit is between the suspension and if 3" is even possible.
Julian
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