I have the Magnaflow Catback, no other engine mods.....The twin tips look great, fit very well underneat the bumper, however, the drone that is added in the cab is at times obnoxious. If I could do it again I would put the $$$ into a different mod. You in the New England area? swap out your stock exhaust for my magnaflow. I took it to a shop to have it welded, not only did they bolt the thing on (which I can do myself) but they threw out my stock exhaust, which I specifically asked to have.

 

ready lift will keep the factory ride,t-bar can and most likely change the smoothness of the ride thats why most people put new shocks on after they crank t bar