I have searched on here for both part numbers and have tried to do my research before asking but I am still unsure of which to order 12278 or 12288. I am going to swap out the Y pipe too. I know the 3" inlet from the Y my question is it 2-1/2" or 2-1/4" on the outlet of the muffler? Some of you guys are using the (12278) which is 2-1/4 and some are using (12288) 2-1/2. Both are roughly the same price just want to make sure I go with the right muffler. Thanks guys for the info.
Im getting a muff right now actually haha. I believe, for what ive looked up it is 3in/2.5out dual. Ive even heard people say you could use both? Im not sure. But im trying to decide between flomaster and magna.
My story - http://www.ramforumz.com/showthread.php?t=117311
Georgia on my mind.