I noticed that those who installed the Dynomax UltraFlow used 2in 2out. I was told that SHM exhaust for the L was very loud, so I inquired, but when I saw the $950 price. No way. Since they use 2 single in/single out Dynomax race magnums, I was wondering if I could get it done myself for alot cheaper.
My question is do I need a Xpipe since there would be 2 mufflers & SHM uses 3". Would I get close results w/ 2 1/2"
Lastly, is ultra flow welded another name for race magnums?