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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Hyperco Rear Spring 5in ID 16in Tall 18SNU-175
HYPERCO
$98.00A properly matched rear spring is critical for consistent weight transfer, predictable handling, and balanced suspension geometry under load. The Hyperco 18SNU-175 delivers a moderate 175 lb/in rate that works across street, road course, and light...HYP18SNU-175- SKU:
- HYP18SNU-175
- Availability:
- Ships Same Business Day
- Weight:
- 7.17 LBS
- MFG Part #:
- 18SNU-175
$98.00 -
Hyperco Rear Spring 5in ID 16in Tall 18SNU-150
HYPERCO
$98.00A properly tuned rear spring is fundamental to suspension geometry and chassis balance—especially in performance driving where load transfer and stability directly impact lap times and safety. The Hyperco 18SNU-150 delivers predictable, linear spring...HYP18SNU-150- SKU:
- HYP18SNU-150
- Availability:
- Ships Same Business Day
- Weight:
- 6.73 LBS
- MFG Part #:
- 18SNU-150
$98.00 -
Hyperco Rear Spring 5in ID 16in Tall 18SNU-125
HYPERCO
$98.00A properly matched rear spring is critical for chassis balance, weight transfer, and consistent lap times. The Hyperco 18SNU-125 delivers a moderate 125 lb/in spring rate that works across a wide range of road racing and autocross platforms, providing...HYP18SNU-125- SKU:
- HYP18SNU-125
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- MFG Part #:
- 18SNU-125
$98.00 -
Hyperco Rear Spring 5in ID 16in Tall 18SNU-100
HYPERCO
$98.00A properly tuned rear spring is foundational to suspension geometry and weight transfer—directly impacting cornering grip, braking stability, and overall vehicle balance. The Hyperco 18SNU-100 delivers a moderate 100 lb/in rate that works across...HYP18SNU-100- SKU:
- HYP18SNU-100
- Availability:
- Ships Same Business Day
- Weight:
- 2.78 LBS
- MFG Part #:
- 18SNU-100
$98.00 -
Hyperco Rear Spring 5in ID 20in Tall 18SNT-150
HYPERCO
$122.00A properly tuned rear suspension begins with the right spring rate, and this Hyperco coil spring delivers the 150 lb/in stiffness needed for predictable weight transfer and consistent cornering performance. Whether you're fine-tuning a street-driven...HYP18SNT-150- SKU:
- HYP18SNT-150
- Availability:
- Ships Same Business Day
- Weight:
- 10.75 LBS
- MFG Part #:
- 18SNT-150
$122.00 -
Hyperco Rear Spring 5in ID 20in Tall 18SNT-125
HYPERCO
$122.00A quality rear spring is the foundation of predictable weight transfer and consistent lap times. The Hyperco 18SNT-125 delivers a moderate 125 lb/in spring rate that balances compliance for street driving with the control needed for track applications...HYP18SNT-125- SKU:
- HYP18SNT-125
- Availability:
- Ships Same Business Day
- Weight:
- 9.62 LBS
- MFG Part #:
- 18SNT-125
$122.00 -
Hyperco Rear Spring 5in ID 20in Tall 18SNT-100
HYPERCO
$122.00Rear suspension geometry demands precision, and the Hyperco 18SNT-100 delivers exactly that. With a moderate 100 lb/in spring rate, this coil spring strikes the ideal balance between responsiveness and composure for track-focused vehicles and street...HYP18SNT-100- SKU:
- HYP18SNT-100
- Availability:
- Ships Same Business Day
- Weight:
- 7.78 LBS
- MFG Part #:
- 18SNT-100
$122.00 -
Hyperco Rear Spring 5in ID 20in Tall 18SNT-080
HYPERCO
$122.00The Hyperco Rear Spring 5in ID delivers consistent, predictable suspension geometry for applications demanding a moderate spring rate without excessive stiffness. With an 80 lb/in rate, this conventional coil spring provides the compliance needed for...HYP18SNT-080- SKU:
- HYP18SNT-080
- Availability:
- Ships Same Business Day
- Weight:
- 6.50 LBS
- MFG Part #:
- 18SNT-080
$122.00 -
Hyperco Rear Spring 5.5in ID 12in Tall Single Pigtail 18SNP12-300
HYPERCO
$83.00If you're tuning a rear suspension for precise handling and consistent load control, spring rate is everything—and this Hyperco coil spring delivers the stiffness you need without sacrificing ride quality. The 300 lb/in rate strikes a balance between...HYP18SNP12-300- SKU:
- HYP18SNP12-300
- Availability:
- Ships Same Business Day
- Weight:
- 6.80 LBS
- MFG Part #:
- 18SNP12-300
$83.00 -
Hyperco Rear Spring 5.5in ID 12in Tall Single Pigtail 18SNP12-275
HYPERCO
$83.00The Hyperco Rear Spring delivers consistent, predictable suspension geometry for drivers who demand precision under load. With a 275 lb/in spring rate, this coil spring maintains control during aggressive cornering and acceleration while resisting...HYP18SNP12-275- SKU:
- HYP18SNP12-275
- Availability:
- Ships Same Business Day
- Weight:
- 7.49 LBS
- MFG Part #:
- 18SNP12-275
$83.00Qty in Cart: 0Quantity:Price:$83.00Subtotal: -
Hyperco Rear Spring 5.5in ID 12in Tall Single Pigtail 18SNP12-250
HYPERCO
$83.00A precision-engineered rear spring is fundamental to consistent suspension geometry and predictable handling characteristics on the track or strip. The Hyperco 18SNP12-250 delivers a 250 lb/in spring rate in a compact 12-inch package, ideal for vehicles...HYP18SNP12-250- SKU:
- HYP18SNP12-250
- Availability:
- Ships Same Business Day
- Weight:
- 6.92 LBS
- MFG Part #:
- 18SNP12-250
$83.00 -
Hyperco Rear Spring 5.5in ID 12in Tall Single Pigtail 18SNP12-200
HYPERCO
$83.00If you're tuning a rear suspension for precision handling and consistent load transfer, spring rate directly controls how your chassis responds under acceleration and braking. The Hyperco 18SNP12-200 delivers a 200 lb/in rate in a compact 12-inch...HYP18SNP12-200- SKU:
- HYP18SNP12-200
- Availability:
- Ships Same Business Day
- Weight:
- 6.39 LBS
- MFG Part #:
- 18SNP12-200
$83.00Qty in Cart: 0Quantity:Price:$83.00Subtotal: -
Hyperco Rear Spring 5.5in ID 12in Tall Single Pigtail 18SNP12-175
HYPERCO
$83.00A properly tuned rear spring is the foundation of predictable suspension geometry and consistent weight transfer under acceleration and braking. The Hyperco 18SNP12-175 delivers a 175 lb/in spring rate in a compact 12-inch package, making it ideal for...HYP18SNP12-175- SKU:
- HYP18SNP12-175
- Availability:
- Ships Same Business Day
- Weight:
- 5.83 LBS
- MFG Part #:
- 18SNP12-175
$83.00 -
Hyperco Rear Spring 5.5in ID 11in Tall Single Pigtail 18SNP11-275
HYPERCO
$83.00When you're dialing in your suspension geometry for maximum grip and consistent load transfer, spring rate is everything—and this Hyperco rear spring delivers the 275 lb/in stiffness you need for predictable handling without sacrificing ride quality...HYP18SNP11-275- SKU:
- HYP18SNP11-275
- Availability:
- Ships Same Business Day
- Weight:
- 6.49 LBS
- MFG Part #:
- 18SNP11-275
$83.00 -
Hyperco Rear Spring 5.5in ID 11in Tall Single Pigtail 18SNP11-250
HYPERCO
$83.00A properly tuned rear spring is fundamental to suspension geometry and weight transfer during acceleration and braking. The Hyperco 18SNP11-250 delivers a medium-stiff 250 lb/in rate in a compact 11-inch package, ideal for road racing, autocross, and...HYP18SNP11-250- SKU:
- HYP18SNP11-250
- Availability:
- Ships Same Business Day
- Weight:
- 5.52 LBS
- MFG Part #:
- 18SNP11-250
$83.00 -
Hyperco Rear Spring 5.5in ID 11in Tall Single Pigtail 18SNP11-225
HYPERCO
$83.00A properly tuned rear spring is critical for maintaining chassis balance and controlling weight transfer during acceleration and braking. The Hyperco 18SNP11-225 delivers a 225 lb/in spring rate that's engineered for rear-end applications where you need...HYP18SNP11-225- SKU:
- HYP18SNP11-225
- Availability:
- Ships Same Business Day
- Weight:
- 6.44 LBS
- MFG Part #:
- 18SNP11-225
$83.00 -
Hyperco Rear Spring 5.5in ID 11in Tall Single Pigtail 18SNP11-200
HYPERCO
$83.00A properly tuned rear spring is fundamental to consistent handling and load support under racing conditions. The Hyperco 18SNP11-200 delivers a firm 200 lb/in rate in a compact 11-inch package, making it ideal for vehicles requiring reduced ride height...HYP18SNP11-200- SKU:
- HYP18SNP11-200
- Availability:
- Ships Same Business Day
- Weight:
- 6.50 LBS
- MFG Part #:
- 18SNP11-200
$83.00 -
Hyperco Rear Spring 5.5in ID 11in Tall Single Pigtail 18SNP11-175
HYPERCO
$83.00A properly tuned rear spring is fundamental to achieving consistent weight transfer and predictable handling characteristics on the track or road course. The Hyperco 18SNP11-175 delivers a medium spring rate ideal for street-driven performance cars and...HYP18SNP11-175- SKU:
- HYP18SNP11-175
- Availability:
- Ships Same Business Day
- Weight:
- 5.17 LBS
- MFG Part #:
- 18SNP11-175
$83.00 -
Hyperco Rear Spring 5in ID 11in Tall HYP18SN-500
HYPERCO
$98.00A properly tuned rear spring is fundamental to chassis control and consistent lap times. The Hyperco 18SN-500 delivers predictable, linear spring rates that eliminate deflection under braking and cornering loads, giving you the stability needed for...HYP18SN-500- SKU:
- HYP18SN-500
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- MFG Part #:
- 18SN-500
$98.00 -
Hyperco Rear Spring 5in ID 11in Tall 18SN-450
HYPERCO
$98.00A stiffer rear spring rate is essential for racers and performance enthusiasts who demand consistent chassis geometry under load. The Hyperco 18SN-450 delivers a 450 lb/in spring rate that minimizes body roll and squat during aggressive acceleration and...HYP18SN-450- SKU:
- HYP18SN-450
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- MFG Part #:
- 18SN-450
$98.00
