Originally Posted by JFrye
Im actually getting a custom cat back setup put on at the exhaust shop on Saturday. 2.5 inch pipe back to a muffler (header wrapped beside fuel tank) and 3 inch from the muffler to the back bumper. I will be using a Magnaflow knock off style muffler. I hope it comes out sounding good.
Why not use 3'' from the flex? As the exhaust is the hottest at that point compared to the after the muffler. Or just use 3'' thru out then.