From what I gather from reading other posts the inlet on our mufflers are 3.5 inch and the outlet is 4 inch. For those who just put an aftermarket muffler what all did you buy to install it or did you just take it to a local muffler shop and have it welded in? I would like to try the aftermarket muffler first before dropping $500.00 on the full system I think DPP offers.

Thanks.