thoughts on my exhaust design on my 87 GMC crew cab long bed dually
Thoughts on exhaust design do my 87 GMC crew cab long bed dually with 454
Its start from manifold dual exhaust to 3" pipe to cats from cats to x pipe from to two flowmaster super 44 from mufflers to 3" inch intrets to 4" exit tips the exhaust is go stop in front of the back tires
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