I asked this same question when I bought the kit from northridge. They said due to RK having higher than normal springs RK themselves recommended 4-6 in the front when paired with fox shocks. I called rk and confirmed and reached out to the rk rep on reddit and he confirmed as well. I read a few things on it saying ultimately it wouldnt hurt anything. My front is a d30 so I'm not going to do anything too nuts till that issue is fixed.

I got 35x12.5x17

 

For the record tho I did like how my RK lift performed on and offroad I just did not like how the rear coils sagged and the hoops I had to jump thru. They blamed everything under the sun and then said some people like the squatting dog look. Finally after round and round they gave me a measurement to take on the coils themselves and sure as shit they were way under those measurements. If it were not for the rear coils sagging and the run around I got I would still be running their lift.

If you were in Missoula MT I would install it for you for $350 as long as your rig is not corroded underneath. I used to install them for free but getting too old for that.

 

I'll make sure to pay attention to the coils then.

And thanks I appreciate it. Mines an 18 so it's not too bad underneath. And I'm not far behind you haha.

 

I would check the front driveline at full droop as that length should make the driveshaft hit the exhaust or cross member. 2012+ models should use an exhaust spacer or new high clearance cross pipe. Compaing those fox shocks to the MC rocksport, the rocksport have a 27.3" extended length and a 15.9" collapsed. These shocks just miss the exhaust at full droop and require less bump stop than the fox shocks with the same amount of overall travel. The fox measure 28.25 extended and 17" compressed.

 

Another option is to find a mom & pop muffler shop and have them re-route that exhaust behind the cross member in similar fashion as the aftermarket y-pipes do. I have an AFE pipe and it has worked well for years....picked it up off craigslist for a bargain. I've had two friends do the same thing via a muffler shop, one for $50 and the other for $80. You do need to be proactive and slap some heat shield on gas lines and edge of fuel tank if you do that. Better option than spacers IMO.

 

I agree a new cross pipe would be better.

 

Also, an added benefit to re-routing that exhaust, if you have an auto tranny, is it will make tranny fluid service easier in the future. It's difficult to get that pan out with the exhaust right in the way in factory location.

 

with those long of shocks you might need both an aftermarket ds and the exhaust mod on a 3.6L. you will also need to be totally disconnected up front if you have a rubicon or you will pull your swaybar link bushings out unless you add a limiter strap up front.. I have run front shocks around ~27.2" and had that problem.

 

I just looked up to see what shocks you were talking about. So you got Fox 2.0 shocks in the 4-6" flavor? I can advise as well.....those are dang long. I have those on a 3.5" lift. You're hardly gonna have any uptravel due to the length of the shock bodies unless something has changed since I bought mine, and you are going to have a lot of droop. Unless you're out-boarding your lower shock mounts way out....you'll rub the shit of those on the frame rail. If you do outboard them to avoid the frame rail and binding, you're likely to run into some other issues unless you run some limiting straps like suggested above.

Most people don't want to look at actual collapse/extended lengths of shocks and buy based on advertised lift size. Often times people end up with undersized shocks IMO, but you've gone the other end of the spectrum. Measurement wise, you might have been in a bit more sweet spot with Bilstein 5100s adveratised as 3.5-5" lift. Those bodies are not quite as long as the FOX versions. All this could have changed in the last couple years....admittedly I have not been in the market for shocks lately, but I can tell you I have built myself into a situation I have to pay attention to all actual measurements so I do look at the figures from time to time.

 

I thought it was odd myself... but I was told itll be fine. I guess worse case scenario I just buy a pair of shorter fronts if I have too or see if northridge will swap em out.