UMI Releases New Product: Bumpsteer kit for the GM 64-72 A-Body and 78-88 G-Body

[UMI Performance]

Bumpsteer kit for the 1964-1972 GM A-Body and 1978-1988 GM G-Body
P/N 3060, 4060, 4061
Priced at $179.99/kit

UMI Performance, Inc. is pleased to announce the availability of our race tested bump steer kits for GM A-body and G-body cars. These direct bolt-in kits allow the builder to relocate the outer tie rod end lower than stock (or higher if necessary) which can help reduce or eliminate toe change during suspension travel (aka bump steer). The stud taper is exact factory fit for each application and is constructed of 4140 CrMo for strength and durability. The adjuster is 6061 for lightweight strength and features a hard anodized finish for years of durability. Kits include shims of 0.125”, 0.1875” and 0.250”. These race-tested bump steer kits are 100% designed and manufactured with pride in Philipsburg, PA – USA.

[raustinss]

I'm assuming this is meant to be used with a stock spindle and steering arm ?

[UMI Performance]

Originally Posted by raustinss

I'm assuming this is meant to be used with a stock spindle and steering arm ?

The kit will work with spindles that take factory tie rods, we use them on a Fatman 2" drop spindle as well as factory spindles on both A and G-Body right now.

[raustinss]

ATS AFX spindles from what I know use stock tie rods but have revised steering arms and geometry so that would be one that wouldn't require your kit hence part of the reason I was asking . Any others that do or don't work that you are aware of

[UMI Performance]

Originally Posted by raustinss

ATS AFX spindles from what I know use stock tie rods but have revised steering arms and geometry so that would be one that wouldn't require your kit hence part of the reason I was asking . Any others that do or don't work that you are aware of

Correct, if the spindle has geometry corrected then this kit would not be needed unless it was not where the customer wanted it, then it looks like there is an option to use this, assuming it works on ATS spindles. We have not tried.

I guess I was referring to fitting, not needing.

[UMI Tech]

Bump steer measurement is one of those things where you can get an idea of where you're at, easily. Or you can get precise data with specialized tooling.

For the quick and dirty method you can check toe at various ride heights and record the data. Any toe change would be "bump steer".

If you have the inclination and funding many circle track companies make bump steer gauges. We use Longacre but for no particular reason other than we have a few other Longacre products and they work well.

We have our A and G body dialed in nicely. To get it 80% correct helps a ton. 100% correct takes some effort but is worth it for how nicely the cars drive and respond.

ramey

[SSLance]

I spent several hours dialing my bump steer in with laser pointers, graph paper, and a two post lift and springs removed from the front of my car. It's easier with the proper tools for sure but can be done the old school way.

Either way...very much well worth the effort and these new pieces from UMI look sweet and should do the trick!!

[UMI Performance]

Originally Posted by SSLance

Either way...very much well worth the effort and these new pieces from UMI look sweet and should do the trick!!

Thanks Lance