2 1/2" or 3"

EL5DEMON340 said

2.5" should work good, use a x pipe with the large 20" dynomax super hemi mufflers, and if you could fit some resonators in the tail pipe section you will fine,

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My car will be mini tubed, springs relocated with a factory tank, so no resonators. I am planning on using Spin Tech mufflers http://www.spintechmufflers.com/muf...sman-splitcase-300scs-180-series/cat_122.html dumping out the side of the car, just do not know what diameter....