Join Date: Aug 2011
Location: Santa Clara, CA
Feedback: 0 reviews
You will definitely need a new driveshaft, you'll bottom out the ball-and-race CV joint on the stock driveshaft with that much lift. If it is a 2012 you'll also need to relocate your exhaust crossover because the driveshaft will bottom out on the exhaust pipe, there's a couple of kits for doing that in a bolt-on manner or any competent exhaust shop can easily bend a new pipe. This will likely hurt power slightly since the exhaust system on the Pentastar is tuned to exactly maximize scavenging with the VVT system, but the 2012 has such a ridiculous amount of power on tap that you likely won't notice.
One question: Why so much lift? Add a 2" lift and flat fenders (Bushwacker, Xenon, or etc.), trim the rear pinch seam slightly, and 35's fit just fine and won't rub anything at all. Are you wanting bigger than 35's? I'll just note that the Rubicon was in nasty shape this year, but folks on 35's had no real problem with the trail...