Suspension and Components
Circle Track Suspension Parts: Control Arms, Shocks & Springs for IMCA & Late Models at JJ Motorsports
Optimize handling and stability on the track with premium circle track suspension components from JJ Motorsports. Our selection includes control arms, shocks, springs, weight jacks, and more, designed for superior cornering, durability, and performance in late models, modifieds, street stocks, and IMCA dirt racing. Compatible with GM Metric frames and other setups, these high-quality parts ensure reliable operation and enhanced traction under intense racing conditions.
Shop trusted brands like Allstar Performance. Explore related categories such as circle track steering and components for precision control or circle track brakes for stopping power.
Top Circle Track Suspension Products
- Lower Control Arm Kit for 1978-88 GM Metric Street Stock & Hobby Stock, Includes Ball Joints & Greasable Bushings – This kit includes stamped steel lower control arms with black powdercoat finish, greasable bushings, and weld-in greasable ball joints for enhanced suspension performance. It is compatible with 1978-88 GM Metric G-Body vehicles and designed for street stock and hobby stock racing applications.
- Allstar Performance Metric Upper Control Arm Left 9in ALL57984 – This tubular upper control arm is designed for the driver side on GM Metric Frames, measuring 9.00 inches long with a bolt-in ball joint and steel construction finished in black powder coat. It features greasable pivot points and is ideal for hobby stock race cars, providing a perfect fit and function.
- Spring Cup Weight Jack Bolt Combo ONE PAIR IMCA Modified Dirt USRA B-Mod Cups – This kit includes two 8" long steel jack bolts with 1-8 course threads and two steel spring cups with a 5-inch outer diameter. It is designed for IMCA Modified, Dirt, and USRA B-Mod cups.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
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On Sale
U-B Panhard Bar Mnt. Angled Serrated Above Axle C/L 46-1607
U-B MACHINE
MSRP: $120.99Now: $117.36Was: $120.99Panhard bar mounting geometry directly impacts your suspension's lateral locating accuracy and handling stability under load. This U-B angled bracket is engineered for above-centerline axle mounting, providing the precise bar angle needed to maintain...UBM46-1607- SKU:
- UBM46-1607
- Availability:
- Ships Same Business Day
- Weight:
- 5.98 LBS
- MFG Part #:
- 46-1607
MSRP: $120.99Now: $117.36Was: $120.99 -
On Sale
U-B Serrated Steel Plate .625 slot .5 x 2 x 6 46-1604
U-B MACHINE
MSRP: $53.99Now: $52.37Was: $53.99Suspension geometry demands precision, and this U-B serrated steel plate delivers exactly that. Whether you're fine-tuning Panhard bar height on the track or dialing in street suspension, the quarter-inch serrated steps give you repeatable, incremental...UBM46-1604- SKU:
- UBM46-1604
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- 46-1604
MSRP: $53.99Now: $52.37Was: $53.99 -
On Sale
U-B Serrated Steel Plate .75 slot .5 x 2 x 6 46-1602
U-B MACHINE
MSRP: $53.99Now: $52.37Was: $53.99If you're running a Panhard bar suspension setup, precise adjustment is everything—even minor misalignment kills handling and tire wear. This U-B serrated steel plate gives you the fine-tuning capability to dial in your bar angle in 1/4-inch increments,...UBM46-1602- SKU:
- UBM46-1602
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- MFG Part #:
- 46-1602
MSRP: $53.99Now: $52.37Was: $53.99 -
On Sale
U-B Serrated Steel Block .625 Hole 46-1601-B
U-B MACHINE
MSRP: $23.99Now: $23.27Was: $23.99If you're running a Panhard bar setup and need precise suspension geometry adjustments, the U-B Serrated Steel Block delivers the fine-tuning capability that separates dialed-in handling from guesswork. The serrated design with 1/4-inch incremental steps...UBM46-1601-B- SKU:
- UBM46-1601-B
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MFG Part #:
- 46-1601-B
MSRP: $23.99Now: $23.27Was: $23.99Qty in Cart: 0Quantity:Price:MSRP: $23.99Now: $23.27Was: $23.99Subtotal: -
On Sale
U-B Serrated Steel Block .75 Hole 46-1601-A
U-B MACHINE
MSRP: $23.99Now: $23.27Was: $23.99Precision suspension geometry demands precision hardware—and this serrated steel block delivers the adjustability your panhard bar setup requires. If you're dialing in your vehicle's handling characteristics or compensating for chassis modifications, the...UBM46-1601-A- SKU:
- UBM46-1601-A
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MFG Part #:
- 46-1601-A
MSRP: $23.99Now: $23.27Was: $23.99 -
On Sale
U-B Panhard Bar Mount for Quick Change 46-1600
U-B MACHINE
MSRP: $105.99Now: $102.81Was: $105.99Lateral chassis movement during hard cornering can compromise your suspension geometry and reduce tire contact patch—the U-B Panhard Bar Mount for Quick Change 46-1600 provides the rigid, repeatable locating you need to maintain consistent handling and...UBM46-1600- SKU:
- UBM46-1600
- Availability:
- Ships Same Business Day
- Weight:
- 8.30 LBS
- MFG Part #:
- 46-1600
MSRP: $105.99Now: $102.81Was: $105.99 -
On Sale
U-B Panhard Bar Mount 46-1526
U-B MACHINE
MSRP: $60.99Now: $59.16Was: $60.99A Panhard bar keeps your axle centered under load, preventing lateral movement that causes handling issues and uneven tire wear. The U-B 46-1526 mount clamps directly to your axle tube for a solid, repeatable connection without welding—ideal for street,...UBM46-1526- SKU:
- UBM46-1526
- Availability:
- Ships Same Business Day
- Weight:
- 4.21 LBS
- MFG Part #:
- 46-1526
MSRP: $60.99Now: $59.16Was: $60.99 -
On Sale
U-B Lower Control Arm Mount Pair 46-1092
U-B MACHINE
MSRP: $39.99Now: $38.79Was: $39.99A solid trailing arm bracket is non-negotiable for chassis rigidity and suspension geometry control—especially when you're tuning suspension geometry on classic GM platforms. The U-B Lower Control Arm Mount Pair delivers the structural foundation needed...UBM46-1092- SKU:
- UBM46-1092
- Availability:
- Ships Same Business Day
- Weight:
- 3.67 LBS
- MFG Part #:
- 46-1092
MSRP: $39.99Now: $38.79Was: $39.99 -
On Sale
U-B Upper Control Arm Mount Metric Pair 46-1091-A
U-B MACHINE
MSRP: $45.99Now: $44.61Was: $45.99If you're building a high-performance suspension for your GM A-Body or G-Body, factory control arm mounts won't cut it. These weld-on trailing arm brackets provide the rigid, precision geometry you need for consistent handling and reduced deflection...UBM46-1091A- SKU:
- UBM46-1091A
- Availability:
- Ships Same Business Day
- Weight:
- 2.64 LBS
- MFG Part #:
- 46-1091A
MSRP: $45.99Now: $44.61Was: $45.99 -
On Sale
U-B Upper Control Mount Metric Mono Ball 46-1091
U-B MACHINE
MSRP: $129.99Now: $126.09Was: $129.99When you're dialing in suspension geometry on a street or track-built A-Body or G-Body, precision trailing arm mounting is non-negotiable. This weld-on upper control mount uses a spherical bearing to eliminate binding and allow true suspension...UBM46-1091- SKU:
- UBM46-1091
- Availability:
- Ships Same Business Day
- Weight:
- 4.58 LBS
- MFG Part #:
- 46-1091
MSRP: $129.99Now: $126.09Was: $129.99 -
On Sale
U-B Monoball Pivot Kit Metric Trailing Arm 46-1090-KIT
U-B MACHINE
MSRP: $115.99Now: $112.51Was: $115.99Worn trailing arm bushings introduce unwanted compliance in your rear suspension geometry, degrading handling precision and increasing tire wear. The U-B Monoball Pivot Kit replaces soft elastomer bushings with spherical steel construction, delivering...UBM46-1090- SKU:
- UBM46-1090
- Availability:
- Ships Same Business Day
- Weight:
- 2.34 LBS
- MFG Part #:
- 46-1090-KIT
MSRP: $115.99Now: $112.51Was: $115.99 -
On Sale
U-B Clamp On Bracket For Liftbar 46-0138
U-B MACHINE
MSRP: $23.99Now: $23.27Was: $23.99If you're running a lift bar setup, you need a bracket that won't fail under load or vibration. This U-B clamp-on bracket delivers a solid, repeatable connection to your 3-inch axle tube without requiring welding or fabrication. The robust steel...UBM46-0138- SKU:
- UBM46-0138
- Availability:
- Ships Same Business Day
- Weight:
- 0.83 LBS
- MFG Part #:
- 46-0138
MSRP: $23.99Now: $23.27Was: $23.99 -
On Sale
U-B Trailing Arm Clevis fits 46-0050 46-0055
U-B MACHINE
MSRP: $36.99Now: $35.88Was: $36.99A properly functioning trailing arm clevis is critical to maintaining suspension geometry and rear-end stability, especially under acceleration and cornering loads. This U-B clevis delivers the precision fitment needed for consistent suspension...UBM46-0055- SKU:
- UBM46-0055
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
- MFG Part #:
- 46-0055
MSRP: $36.99Now: $35.88Was: $36.99 -
On Sale
U-B Floating Trailing Arm Bracket 46-0050
U-B MACHINE
MSRP: $144.99Now: $140.64Was: $144.99Trailing arm geometry directly impacts rear suspension performance, handling precision, and component longevity under sustained racing loads. The U-B Floating Trailing Arm Bracket 46-0050 delivers the rigid, predictable mounting your suspension demands...UBM46-0050- SKU:
- UBM46-0050
- Availability:
- Ships Same Business Day
- Weight:
- 2.14 LBS
- MFG Part #:
- 46-0050
MSRP: $144.99Now: $140.64Was: $144.99 -
On Sale
U-B Tube 1.25 x 35 x 3/4 thread 42-3501-A
U-B MACHINE
MSRP: $73.99Now: $71.77Was: $73.99A properly engineered suspension tube is critical for maintaining chassis rigidity and precise handling geometry in high-performance applications. This U-B tube delivers the structural integrity you need for custom suspension builds, whether you're...UBM42-3501-A-PC- SKU:
- UBM42-3501-A-PC
- Availability:
- Ships Same Business Day
- Weight:
- 3.47 LBS
- MFG Part #:
- 42-3501-A
MSRP: $73.99Now: $71.77Was: $73.99 -
On Sale
U-B Tube 1.25 x 34 x 3/4 thread 42-3401-A
U-B MACHINE
MSRP: $71.99Now: $69.83Was: $71.99A properly engineered suspension tube is critical for maintaining structural integrity and adjustable geometry in custom suspension builds. This U-B tube delivers the precision fitment and durability required for demanding applications, whether you're...UBM42-3401-A-PC- SKU:
- UBM42-3401-A-PC
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- MFG Part #:
- 42-3401-A
MSRP: $71.99Now: $69.83Was: $71.99 -
On Sale
U-B Tube 1.25 x 33 x 3/4 thread 42-3301-A
U-B MACHINE
MSRP: $70.99Now: $68.86Was: $70.99A properly engineered suspension tube is critical for maintaining chassis geometry and ensuring consistent handling characteristics under load. This U-B tube delivers the structural integrity and dimensional precision required for custom suspension...UBM42-3301-A-PC- SKU:
- UBM42-3301-A-PC
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- MFG Part #:
- 42-3301-A
MSRP: $70.99Now: $68.86Was: $70.99 -
On Sale
U-B Tube 1 x 32 x 3/4 thread 42-3202-A
U-B MACHINE
MSRP: $54.99Now: $53.34Was: $54.99A properly engineered suspension tube is critical to maintaining chassis rigidity and suspension geometry under racing loads. This U-B tube delivers the structural support your suspension needs without compromising weight or fitment, making it an...UBM42-3202-A-PC- SKU:
- UBM42-3202-A-PC
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- MFG Part #:
- 42-3202-A
MSRP: $54.99Now: $53.34Was: $54.99 -
On Sale
U-B Tube 1 x 31 x 3/4 thread 42-3102-A
U-B MACHINE
MSRP: $45.99Now: $44.61Was: $45.99Precision suspension geometry demands components built to exacting tolerances, and this U-B tube delivers the structural integrity your setup requires. Whether you're fine-tuning a race car's suspension kinematics or fabricating a custom control arm,...UBM42-3102-A-PC- SKU:
- UBM42-3102-A-PC
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- MFG Part #:
- 42-3102-A
MSRP: $45.99Now: $44.61Was: $45.99 -
On Sale
U-B Tube 1 x 30 x 3/4 thread 42-3002-A
U-B MACHINE
MSRP: $36.99Now: $35.88Was: $36.99A properly engineered suspension tube is foundational to building a reliable suspension geometry that maintains consistent handling and load distribution under racing conditions. This U-B tube delivers the dimensional precision and material integrity...UBM42-3002-A-PC- SKU:
- UBM42-3002-A-PC
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- MFG Part #:
- 42-3002-A
MSRP: $36.99Now: $35.88Was: $36.99
