Ok I have searched he forums to try and find out what model number and length muffler to go with. My question is i want to just change out the stock muffler(really because its a lease and don't want to dump a whole lot of money). I have read magnaflow is sounds better and you don't loose any low end power, like with the flowmaster. I want that loud deep tone, but don't want to loose stock pipes.



Thanks

 

You need to go to their web page , & enter your truck infor. I have one of their mufflers it not loud & has nice sound to it. Plus under their warr. I`ve had it replaced once @ no cost. I think I still have the stock number somewhere. Mine is probadly the quiet one , but louder than stock.
Lariat#1

 

I am very happy with my 12158. You can get a SI/SO ( get the part # at their site) for your stock pipes configuration. Good luck.