I installed a 2.5 X pipe set up on my old duster in the driveway on my back...Took a lil tweaking to get the tips absolutely symmetrical, but that's just my fault for being picky. Friend just had new system with H-pipes from factory manifolds with magnaflows and paid almost $700.00. The muffler guy created a work of art, but for the money my next system will be TTI with the full mandrel bends and heavy duty hangers...