UMI Performance · New
UMI Performance 64-72 GM A-Body 1-3/8in Tubular Rear Drag Sway Bar-Bolt-on
MPN 4045-300-B · Store SKU umi4045-300-B
Supplier stock checked 11/7/2026, 7:38:37 AM UTC. Adding a part does not reserve it.
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Product details
UMI's A-body Anti-Roll bar is designed to help your hot rod leave the line flat and straight. The bars are manufactured from light weight 1-3/8” diameter tubular steel and feature three different rates (street/strip, strip with drag radials and full slick settings). UMI's tried and true CNC machined clamping system allows differential housing mounting on 3" and 3.25" diameter housings. These can be bolted on, or welded for additional security. Since your car will be launching hard, we recommend welding. The double shear chassis mounts are held in place by four 3/8" fasteners and feature our exclusive reinforcement plate up top to help distribute the load. Drilling through the crossmember is required and a template /instructions are included. The house made hex adjuster allows pre-loading of the bar when used for drag applications so your car leaves straight no matter how much power you throw at it. This A-body drag bar is available in beautiful red or black powder coat. Manufactured with pride in Philipsburg, PA - USA. Moser Engineering 9” rear ends manufactured after early 2002 use 3” axle tubes. Rear ends manufactured prior to early 2002 use 3.25” axle tubes. Please verify diameter before ordering. 1-3/8” diameter tubular bar for incredible strength, resistance to roll and light weight (saves 8-10lbs over the competition with no loss of roll resistance) 1” Billet steel hex adjuster for extreme strength. On-car adjustable to set preload. Designed to clear all rear ends - Factory 10-Bolt, 12-Bolt, 9”, M9, S60 and others Heavy duty machined aluminum sway bar mounts with greaseable polyurethane bushings Factory rear end, Strange Engineering and Currie rear ends use 3” diameter axle tubes Other brand rear ends will vary, please check your axle tube diameter before ordering. CNC machined sway bar mounts with grip teeth and reinforcement gussets 4045-300 - 1964-1972 GM A-Body 1-3/8” Tubular Rear Drag Sway Bar - Bolt-on Heavy duty ultra premium CrMo spherical rod ends with Teflon race. Switch easily from car to car just by changing u-bolt sizes 1964-1972 GM A-Body 1-3/8” Tubular Rear Drag Sway Bar - Bolt-on Moser Engineering 12-bolt rear ends use 3” diameter axle tubes High strength 4140 CrMo zinc-plated u-bolts Durable long lasting powder coat 100% bolt in installation! Axle Tube Diameters: Features:
Manufacturer fitment & guides
Check 4045-300-B against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
