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.

https://static1.pt-content.com/images/pt/2016/09/4060a_LRG-1.jpg

[hotrodalex]

Is this kit a good match for a stock-style 2" drop spindle and 0.9" tall upper ball joint?

[UMI Tech]

Is this kit a good match for a stock-style 2" drop spindle and 0.9" tall upper ball joint?

Absolutely! The tall upper ball joint doesn't hurt nor help bump steer very much. But anytime you change the spindle, or anything with the lower arm arrangement vs steering arm, a bump steer kit is always a good idea.

Also, there is so much variation in the stock frames bump steer optimization helps.

We are happy to help by phone or at [email protected]

Thanks

ramey

[David LaBuda]

How do you figure out what combination of shims to use?

[UMI Tech]

The politically correct answer to your question is that you need to have a bump-steer gauge to correctly tune bump steer.

I would do a google search and you will get "much" info on adjusting bump-steer.

Craig

[UMI Performance]

Here's a few articles we found helpful. We personally use the Longacre gauge and really like it.

http://www.longacreracing.com/technical-articles.aspx?item=8162

http://www.hotrod.com/articles/ctrp-1001-bump-steer-explained/

[raustinss]

Would these be needed with AFX spindles?

[garvir]

you should start reading circle track mag, bob bolles does some really good articles on suspension, bump steer, pinion angles, ackermann steer, reverse ackermann, car maintaining. these circle track guys are good, a lot to learn, and the circle track suppliers have some good deals on parts. Gary