Jeep JK Wrangler 2.5″ Budget Boost
Installation Write-Up


Thanks to the wide open fender design that the Jeep JK Wrangler has, you can pretty much run a 33″ tires bone stock and get up on a set of 35″ tires with very little effort. Of course, the easiest and most cost effective way to get the extra clearance you need to run them is to install a 2.5″ coil spacer lift. More commonly known as a budget boost, coil spacers are cylindrical blocks that are made of a polymer or sometimes steel and they are designed to sit on top of your factory coils to give you as much lift as they are tall. When installed with a set of shock adapters, you will effectively have a small lift that will not change the quality of your ride and do it all for about $350. This write-up will give you a general idea just how easy it is to install a budget boost on your Jeep JK Wrangler.

Jeep JK Wrangler 2.5″ Budget Boost Installation Write-Up

28 Comments on Jeep JK Wrangler 2.5″ Budget Boost
Installation Write-Up

  1. Thanks for the help, I have two questions?

    1. I have an 07 sahara, do have to put the rear sway links up front?

    2. Do I really need to install the rear track bar extension?

    thanks again

  2. you may see some rubbing at a full flex if you don’t cut your fenders and, you will feel some power loss but, i found it to be tollerable.

  3. Hi! Eddie,

    I have a 2 door rubicon and it’s my daily driver. I wanna fit 35″ tires on it, but right now I have limited budget.
    I heard from others that if I lift myjeep under 3″, the only thing I need is just the basic kit like the TF 2.5, and my jeep will not have any problem that need to be solved with more after market modification even after a long period of time.
    I will be very happy if that is true, but will my jeep strong enough with this kit when I’m doing something that’s extrme? Should I get the TF elite 3″ suspension system instead? I would love to buy one kit that has awesome quility and perfectly fits my jeep. The time takes to save up the money does not really matter.
    Another thing I want to mention is if I get the TF 3″ lift,is it possible to put 37″ on with a body lift? Will my jeep be able to acess those under ground parking lots that have 6’6″ clearance?

    Thank you very much
    Nic

  4. Hey I have a question… I have a sport that I will be putting Rubi springs and shocks on. I was told that if I also do this budget boost I might run into axle angle, camber issues. I saw that the write up was done with a Rubi so i didnt think it would be an issue.

    Thanks for any help!

  5. I just ordered a set of 16×8 inch rims with a 4 inch backspacing and 315 75 R16 tires. I originally wanted to get a wheel with a 4.5 inch backspacing but this is what was available in a style i liked. My concen is with this lift and the wheel sticking out 1/2 furhter, will is rubb my stock wheel well when the axles are flexing?

  6. Eddie
    I Ordered a 2012 2dr rubicon and will be picking it up when I get back from Afghanistan. The first thing I plan to do is install the 2.5 BB under it. I want to run a 295/70/17 or 305/70/17 on the factory rims. With a 1.5″ wheel spacer do you know if the tire will stick out past the fender? as the is now allowed in PA.
    Thanks for your help.

  7. I have a 2012 JKU and I was wonding if there was any drive shaft problems when lifting the new 2012 that heigh? and also would you recommend the wheel spacers if your running stock rubicon rims and tires?

  8. on a 2012, you will have problems with the front drive shaft IF you get shocks that offer too much droop. unlike previous years, this would be true regardless if you have an auto or manual. when you place your order, make sure to let them know that you have a 2012 and they will get you the correct length shocks.

  9. Eddie,
    I think you show a pic of your Jeep with 35’s and 2.5″ BB. I would like the same setup but would like to know the Total Height with the Hard Top on. Please let me know if possible

  10. Hi Eddie,

    First thanks for JK-Forum and Project JK…really the best place on the web for JK’s. I have read so many threads on this and I just need a sanity check for the expert!

    I’m the original owner of our 2008 JKU Sahara, auto, 3:73’s, with 91,000KMs on it. It’s a long term vehical, plan to hold onto it for a long time.

    I have a daily commute of 120KM round trip per day, 5 days a week, 95% all highway. It’s my DD, and do light trails, nothing extream.

    I have picked out the Mickey T 33X12.5X17 to be mounted on a Procomp wheel 17X9 with a 4.75″BS. I will buy a Procal module too.

    I’m torn between the TF leveling kit and the TF BB with shock extensions….after reading this write up many times over, I think this is the one for me.

    I don’t see me ever goning to 35’s.

    Questions:

    -is there any concern with drive line angles at the T-case or diffs too extream with this kit?
    -will I cause any premature wear on ball joints, wheel berings vs the stock size?
    -no plans for re-gearing, do you think for my style/commute of driving will I notice a big loos of power, way too much gear hunting from the good old 42RLE?
    -I expect some loss in MPG, but hope it’s not huge loss.
    -Am I missing anything else?

    Awsome write up!

    Regards,
    Peter

  11. Great write up…I will be doing this mod in the spring for sure. I was wondering if you would recommend buying shock boots for the Terraflex shocks, I will not be reusing my stock shocks? Terraflex does not offer any with the kit?

  12. I bought 2010 JK Unlimited Rubicon with soft top and half doors. I bought Freedom hardtop from dealer’s parts dept separately at time of purchase, but wondering if my front coils might be less than that of those Rubi’s that come from factory with hardtop. I’ll have to check # on coil sticker. I’m planning on adding both heavy front bumper/winch combo, as well as heavy rear bumper. I’m thinking any sag in front will be leveled by rear weight too. Got a deal on the TF 2.5 BB kit and based on threads above, seems I’ll be ok. Would you agree or recommend spending the extra $ for 2.5 coil lift given the weight? Is there a min coil# I should have on my stock rubi coils for this setup? Thank you.

  13. Bought a 2013 JK 4Dr Rubicon and looking at getting a bit of a lift for running 33’s or 35’s. Couple quick questions.

    1. AEV or Terriflex BB lift? Which do you recommend and why?

    2. Any issues running 35×12.5’s? (and would you go that big) with a Rubi with 2.5″ BB lift? This is a daily driver that also does some off-roading but no serious rock crawling (nothing that can damage the body). We’d be running with a 17×9 rim (Procomp or XDs not sure yet)

  14. Oops…darn copy/past cut off half my question. Heres the full deal.

    Bought a 2013 JK 4Dr Rubicon and looking at getting a bit of a lift for running 33’s or 35’s. Couple quick questions.

    1. AEV or Terriflex BB lift? Which do you recommend and why?

    2. Any issues running 35×12.5’s? (and would you go that big) with a Rubi with 2.5″ BB lift? This is a daily driver that also does some off-roading but no serious rock crawling (nothing that can damage the body). We’d be running with a 17×9 rim (Procomp or XDs not sure yet)

    3. Should we replace the track bars on the jeep? Again, any recommendations? I heard to replace the diff cover for some better protection, you need to replace the track bars.

    #4.You mentioned needing a modified tire carrier for a 35×12.5? Is this also needed on a 33×12.5? If so we were looking at a Poison Spyder rear carrier/bumper but wasn’t sure about the weight with the BB lift.

    Thanks!

  15. hello
    I alredy got an OME 2″ lift on my jku, is it possible to add a BB to this to get even more lift?

  16. Hello! I just bought a 2010 2 door Wrangler Jk (my first jeep) and I am considering the Teraflex 2.5′ budget boost. I really know nothing about lifts or suspensions so any advice is helpful. What exactly do I need, or would be good to have, to run this kit on my jeep with 35′ tires? Money isn’t really an issue but I don’t want to spend a fortune(else it wouldn’t be much of a budget boost lol). I would rather pay the money now as opposed to later on down the road! Thanks for the help!

  17. Well, this is a “budget” boot meaning that it’s cheap and will pretty much give you what you need to lift your Jeep 2.5″. To clear your 35’s, you’ll most likely need to do some minor trimming of your fenders and pinch seam.

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