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I'm looking for an economical leveling kit for my '06 Colorado Z71, I5, reg cab. I do not do any off road driving and am only looking to give my truck a more aggressive profile and appearance. Has anyone had experience with Suspension Specialists 3+3 torsion key, shackle, procomp shock kit? With only road driving, is an upper bj flip necessary? I am planning a differential drop. I'm 60+ years old and not afraid to dirty my hands but don't have air tools. Should I have a local shop install and how much time would it take for that work? Thanks for your advice in advance! I tried to do a search on this but my shit android tablet won't let me type in the search words.
 

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you dont need new keys unless yours have been maxed out, and due to torsion bar sag it wont get as high as you want, otherwise they are a waste of money. they just allow you to crank farther than factory keys (IF ITS NEEDED) stock keys will get you 2-3 inches taller unless your TB's are really sagging.

flipping the ball joints is a must if you are going to crank the TB's much and a 3/4 inch dif drop using washers as well. some says its optional, but you cant say it doesnt allow things to line up better which will increase their lifespan.

I would crank your factory bars and keys and see where you get,
get the suspension maxx adjustable 1, 1.5, or 2 inch rear leaf spring spacer and lift the rear to match the front,

I have factory keys, with the front cranked about 2 and 3/4 inches, 2 inch lift in the rear, and done a 1 inch body lift using hockey pucks, (the only modification needed is spinning the fan shroud, check out the HOW TO on here) flipped ball joints, spaced the diff 3/4 inch using washers and everything including longer body mount bolts came in under $150.00 and it's plenty high, then added 265/70/17 goodyear duratracs. dont forget to get an alignment when everything is done. be prepared for a much harsher ride, nothing you can do about that unless you want to spring for a $1,500 lift kit.

 

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You will not need to flip the upper ball joint if you lift the rear 2" and go level. It may be recommended, but for that it is not necessary. If you try to go extreme, up to 24.5" and more then it's better to do it than to not do it.

Don't get wrapped up on a 3" kit because there are no fixed number results with torsion bar lifting. You just crank until the front fender lip measures 24" to 24.5" from the center of the hub.

If you just want to level, just crank up you torsion bars. No work necessary to the rear.

Like Excalibur says, you may not need new keys. My recommendation is to crank the front now and see how high it goes. If you can achieve the above dimension then new keys are not necessary. However, this suggestion assumed you plan to start the work as you'll tweak the front end alignment specs after any height adjustment. You can crank it up, then back down however your alignment will not be equal to what it was prior to the work.
So crank it up, see if it gets there or not. Order parts accordingly. Install. Align after a few days.

And one last thing, if you go up 3" or so in the front be aware that the ride quality is not ideal. It becomes quite harsh.
 
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