These are to remove the torsion bar setup on 99-07 GM Fullsize Trucks and SUVs and install coilovers as the front suspension (includes 2wd and 4wd torsion bar trucks). This swap is useful for ~6 of drop to ~4” of lift with no other mods compared to a stock height truck. For lifted trucks, see the listing for the “Lift Kit” brackets that will accommodate lifted trucks up to ~8″ of lift. The brackets are MIG welded 3/8″ steel that have a doweled design that is very strong.
The most popular combination is the lower brackets and the normal upper brackets (this constitutes a Full Normal kit). The Stud Bushings can be used with or without the normal upper brackets and are an option on the right. These brackets require the factory LCA but can be used with aftermarket UCAs and Spindles. No welding required!
There are several advantages to coil overs from torsion bars. The biggest one is they ride much, much better, and depending on what shocks and springs you use can have many different ride settings for many different conditions. Torsion bars, on the other hand, leave you pretty much stuck and only able to adjust shock dampening rates and not the spring rate itself. Many 4wd guys crank or decrank the bars to adjust ride height (yes this applies both to lifted and lowered guys), and this changes the ride drastically. The torsion bar setups are basically meant to ride on the bump stops or slightly above them. On lifted setups when you crank the bars the ride is usually the biggest complaint since the bump stop is so far away its not used. On lowered setups its basically the same just the opposite direction and you are constantly riding on the bump stops even after trimming them.
Second advantage is going to be the huge selection of shocks and springs available in the aftermarket. I use QA1 shocks and hyperco springs, however King, Fox, QA1, Viking and whoever else makes coilovers can be used. Spring wise, hyperco seems to offer the biggest range in lengths and spring rates that I could find, and they are well priced. Popular spring makers include Hyperco, Eibach, and PAC. A third advantage is this saves roughly 40lbs of weight by removing the torsion bar system.
If you need help picking out the correct springs and shocks for your application please measure like the attached picture with the truck at the ride height you want (or as close to it as you can get) and let me know what that is.
I do not sell anything but the brackets. A complete parts list can be found in the below PDF and everything is available on Summit/Jegs/Amazon/Ebay or whatever your favorite store is. I do this to keep costs as low as possible and to pass on that savings to you.
Full Kit includes:
- Lower brackets
- Upper reinforcement brackets
- Grade 8 Hardware
- Stud bushing kit is optional (+$40)
For more in depth write up and installation instructions, see the PDFs below: