Right now i have welded in flowmasters with a mac prochamber, what kinda differences would i see with 2 1/5 tubbing or massive 3 inch? would 3 inch make it worse?
your exhaust tubing size should match the output of your engine. too big or too small is bad. a 3" dual is way too big for a 260hp engine. a 2.5" dual exhaust will support a 400hp car.