I've heard the one on summit needs to be modified. Is there anything out there that will work out of the box? How hard is the summit to modify?

 

i have the jet hot headers and the x-pipe kit was supposed to be a direct fit for these...i had to custom fit them. but no big deal i guess. i paid a shop $80 to put the complete system on (cutouts, 3"-2 1/2" reducers, x-pipe, bullets and then turndowns) and that was with a lot of custom fabrication. plus the system is completely welded instead of clamped. i would go with the summit kit and just have it installed by a good shop. they should do the custom fitting for you.