I have Stan's 4", modified into a mufflerless shorty, I like the two piece pipe going around the transmission and transfer case, quality stuff, their system comes with a long Donaldson muffler which I may or may not ever put on... . I think their complete system runs 425. 00... ... this system is from the stock downpipe back. I thinks Rip Rook's system is cheaper and from comments here it seams like a good system also... .