The OP asks about contral arms. Of the two choices presented both are very good quality and offer easier - camber/+ caster alignment and comparable bushings. That being the case I`d go with the less expensive choice and say SpeedTech. Both offer a coil over option but they`re apples and oranges. The SpeedTech is a straight bolt on coil over (hybrid) conversion with no other mods. The DSE involved cutting and welding to install a conventional coil over along with new upper A arms mounts which incorperate a version of the venerable G Mod. This gives you some modest geometry improvement but prevents you from using AFX tall spindles or our X-tall Severe Duty tall ball joints which can offer larger gains (especially the AFX tall spindles). Typically we start where the car has the most trouble, fix that issue then move on to the next one and so on. The geometry on these cars is what`s really bad, also the factory bumpsteer so I`d prefer to see you fix those issues first. That may entail tall spindles, some variation of the G mod (no bumpsteer correction) or a tall balljoint/tie rod end package like our Stage 2-Plus etc. Correcting this fundamental geometry is a real game changer! We`re not talking small incremental improvements, but rather making it drive like a whole new car. When you alter the geometry you`ll almost always have to change the upper A arms to ones made to work with that new geometry. Once installed you`ll also be changing the alignment to more performance oriented settings which will add more performance. Then complete the system with performance rate springs, lowered stance and performance shocks , preferably adjustable. The car can`t tell if you`re using coil overs mounted in the stock location or coil springs and shocks. The coil overs give some adjustment but not as much as you`d think, they have a number of functional limitations based on travel,spring length etc. You can also get adj. ride height with factory type performance springs if you run SPC Performance lower A arms with their modular adj. height lower spring seats. They give you a larger usable range than a coil over conversion but without the worry of setting them up wrong. Combine it with a good adj. aluminum shock and you have a system you can dial in to the height you want and run for 100,000 miles with rock solid reliability. Mark SC&C
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