UMI vs. HRpartsNstuff Sway/Anti-Roll Bar

dustin72

Daily Driver
Sep 9, 2016
28
0
0
Alberta Canada
About to order a street/strip sway/anti-roll bar for my '80 Malibu. Choosing between the UMI and HRpartsNstuff bars. Anyone have any recommendations on which one I should get? They both look similar in design and are close in price. Looking for feedback on either one. Thanks.
 

UMI Sales

Amateur Racer
Jan 6, 2009
254
0
0
I'm not greatly familiar with the HR design but I think they are similar in concept.

We manufacture all the components in our kit in our facility and of US material.

We are currently having a christmas sale that would save you 10% and free shipping$$

If you need any info feel free to give me a call here at the shop.

Craig
 

focused313

Daily Driver
May 14, 2015
23
0
0
UMI is everywhere on the net, lol. You can make a thread about them on a site about cats and you'll get a response.
 

melloelky

Top Fueler
Jul 1, 2009
3,596
1
38
mass
I purchased that as well as my entire front suspension from umi and the service was excellent,i had questions when installing that rear bar,they walked me through it.even before i purchased all the front end parts i had questions and they answered all of them.ive never seen the hr bar but the umi's nice stuff
 

prairiehotrodder

Pro Stocker
Dec 17, 2005
1,570
1
38
43
Melfort Saskatchewan Canada
I'm in Canada. I tried to buy some UMI parts straight from UMI last summer and they made the shipping very difficult for me. To the point where it wasn't worth the hassle. I ended up finding that summit racing was a distributor for UMI and i got the parts i wanted from them and with much cheaper shipping.

BTW - i'm using a Spohn ARB that mounts under the rearend and it works good.

Brian
 

UMI Sales

Amateur Racer
Jan 6, 2009
254
0
0
prairiehotrodder said:
I'm in Canada. I tried to buy some UMI parts straight from UMI last summer and they made the shipping very difficult for me. To the point where it wasn't worth the hassle. I ended up finding that summit racing was a distributor for UMI and i got the parts i wanted from them and with much cheaper shipping.

BTW - i'm using a Spohn ARB that mounts under the rearend and it works good.

Brian
For what it's worth, we are a small company and can't negotiate shipping like Summit can. We charge actual shipping with no hidden charges and do our best.

We appreciate our customers whether they order direct or through a dealer.

ramey
 

dustin72

Daily Driver
Sep 9, 2016
28
0
0
Alberta Canada
prairiehotrodder said:
I'm in Canada. I tried to buy some UMI parts straight from UMI last summer and they made the shipping very difficult for me. To the point where it wasn't worth the hassle. I ended up finding that summit racing was a distributor for UMI and i got the parts i wanted from them and with much cheaper shipping.

BTW - i'm using a Spohn ARB that mounts under the rearend and it works good.

Brian
Yeah, also from Canada. Shipping and the current exchange rate are really making it hard to upgrade my suspension!
 

1982 SS

Frequent Racer
Jan 19, 2007
382
0
0
Clearfield, Utah
What is the wall thickness and material on UMI's 1.375" drag bar. HR parts shows a 1.250" diameter 4130 with a .250 wall thickness. We can use strength of materials to determine which one is actually a stiffer bar. though the UMI is adjustable which adds a nice layer of tenability. All things being equal, the .125" larger diameter adds a fair bit of theoretical stiffness over the 1.25".
 

malibuguy

Top Fueler
Sep 29, 2003
3,775
1
36
Finksburg, Md
www.cardomain.com
Im running a UMI rear bar I bought used from a GN guy locally. Its the 3034 unit, 1" solid.

Works well, noticeable improvement of roll stiffness over a factory f41 rear bar.
 

UMI Sales

Amateur Racer
Jan 6, 2009
254
0
0
1982 SS said:
What is the wall thickness and material on UMI's 1.375" drag bar. HR parts shows a 1.250" diameter 4130 with a .250 wall thickness. We can use strength of materials to determine which one is actually a stiffer bar. though the UMI is adjustable which adds a nice layer of tenability. All things being equal, the .125" larger diameter adds a fair bit of theoretical stiffness over the 1.25".
For the axle mounted anti-roll bar, 1-3/8" OD, 0.250" wall, 34" active torsion length, 6, 7 and 8" arms depending on hole chosen.



The standard mount bar is 1" solid but poses a unique calculation problem and therefore I've never seen a rating for that style.

ramey
 

1982 SS

Frequent Racer
Jan 19, 2007
382
0
0
Clearfield, Utah
What material? 4130? Given the same (or similar) alloy, the UMI is definately stiffer than the HR parts bar. The only other one that I can find in a larger diameter is trick chassis's 1.625" .083 walled weld in bar. Without digging into the the machinery handbook I'm inclined to believe the UMI bar is probably the stiffest bar second only to TRZ's more exotic weld in double bar. I know I'll be putting a UMI drag bar in mine after I get a 9" in the back.