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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Coilover Spring 16in x 3.5in x 160lb 160-350-160 BP
SWIFT SPRINGS
$169.15Precision suspension tuning demands a spring that matches your setup's exact requirements—this Bulletproof coilover spring delivers consistent 160 lb/in rate for predictable handling and repeatability lap after lap. Whether you're dialing in a road...SWI160-350-160BP- SKU:
- SWI160-350-160BP
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- Spring Rate:
- 160 lb.
- Spring Height:
- 16"
- Spring ID:
- 3.5"
$169.15Qty in Cart: 0Quantity:Price:$169.15Subtotal: -
Coilover Spring 16in x 3.5in x 150lb 160-350-150 BP
SWIFT SPRINGS
$169.15Fine-tuning your suspension geometry requires springs that deliver consistent rate and longevity under demanding conditions. This 150 lb/in coilover spring provides the midrange compliance needed for both street and track applications, allowing you to...SWI160-350-150BP- SKU:
- SWI160-350-150BP
- Availability:
- Ships Same Business Day
- Weight:
- 6.55 LBS
- Spring Rate:
- 150 lb.
- Spring Height:
- 16"
- Spring ID:
- 3.5"
$169.15 -
Coilover Spring 16in x 3.5in x 140lb 160-350-140 BP
SWIFT SPRINGS
$169.15Suspension geometry demands precision, and this 140 lb/in coilover spring delivers the consistent rate you need for predictable handling and repeatable lap times. Whether you're tuning a road course setup or dialing in a street-performance build, a...SWI160-350-140BP- SKU:
- SWI160-350-140BP
- Availability:
- Ships Same Business Day
- Weight:
- 6.45 LBS
- Spring Rate:
- 140 lb.
- Spring Height:
- 16"
- Spring ID:
- 3.5"
$169.15 -
Coilover Spring 16in x 3.5in x 125lb 160-350-125 BP
SWIFT SPRINGS
$169.15A properly tuned suspension starts with the right spring rate, and this 125 lb/in coilover spring delivers the precision your setup demands. Whether you're fine-tuning your track car or building a custom suspension geometry, the Bulletproof 16-inch...SWI160-350-125BP- SKU:
- SWI160-350-125BP
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- Spring Rate:
- 125 lb.
- Spring Height:
- 16"
- Spring ID:
- 3.5"
$169.15Qty in Cart: 0Quantity:Price:$169.15Subtotal: -
Coilover Spring 16in x 3.0in x 150lb 160-300-150 BP
SWIFT SPRINGS
$136.85Precision suspension tuning demands a spring that matches your exact setup requirements—and this Bulletproof coilover delivers the consistency and durability professional racers and serious track enthusiasts depend on. With a 150 lb/in rate, it's...SWI160-300-150BP- SKU:
- SWI160-300-150BP
- Availability:
- Ships Same Business Day
- Weight:
- 5.70 LBS
- Spring Rate:
- 150 lb.
- Spring Height:
- 16"
- Spring ID:
- 3"
$136.85 -
Coilover Spring 16in x 3.0in x 125lb 160-300-125 BP
SWIFT SPRINGS
$136.85Precision suspension tuning demands a spring that delivers consistent performance lap after lap without compromise. This Bulletproof coilover spring offers a moderate 125 lb/in spring rate, making it ideal for street-driven performance cars and road...SWI160-300-125BP- SKU:
- SWI160-300-125BP
- Availability:
- Ships Same Business Day
- Weight:
- 5.10 LBS
- Spring Rate:
- 125 lb.
- Spring Height:
- 16"
- Spring ID:
- 3"
$136.85 -
Coilover Spring 16in x 3.0in x 100lb 160-300-100 BP
SWIFT SPRINGS
$136.85A properly tuned suspension starts with the right spring rates, and this 100 lb/in coilover spring delivers the progressive support your setup needs for consistent handling across track conditions. Built with a durable copper powder coat finish and...SWI160-300-100BP- SKU:
- SWI160-300-100BP
- Availability:
- Ships Same Business Day
- Weight:
- 4.55 LBS
- Spring Rate:
- 100 lb.
- Spring Height:
- 16"
- Spring ID:
- 3"
$136.85 -
Barrel Spring 16in x 2.5in 110# 160-250-110 BP
SWIFT SPRINGS
$128.35If you're building a performance suspension system, you need a coil spring engineered to handle serious track demands without compromising ride quality. The Barrel Spring 16in x 2.5in 110# delivers consistent spring rates and durability through a proven...SWI160-250-110BP- SKU:
- SWI160-250-110BP
- Availability:
- Ships Same Business Day
- Weight:
- 5.23 LBS
- Spring Rate:
- 110 lb.
- Spring Height:
- 16"
- Spring ID:
- 2.5"
$128.35Qty in Cart: 0Quantity:Price:$128.35Subtotal: -
Conventional Rear Spring 14in x 5in x 300lb 140-500-300
SWIFT SPRINGS
$136.85If you're tuning your rear suspension for track duty or aggressive street driving, spring rate is everything—and a 300 lb/in conventional spring gives you the stiffness needed for consistent handling without sacrificing ride quality. This 14-inch coil...SWI140-500-300- SKU:
- SWI140-500-300
- Availability:
- Ships Same Business Day
- Weight:
- 7.50 LBS
- Spring Rate:
- 300 lb.
- Spring Height:
- 14"
- Spring ID:
- 5"
$136.85 -
Conventional Rear Spring 14in x 5in x 275lb 140-500-275
SWIFT SPRINGS
$136.85A properly-tuned rear suspension is fundamental to consistent lap times and predictable handling characteristics. This 275 lb/in conventional coil spring provides the stiffness needed for track-focused vehicles while maintaining enough compliance for...SWI140-500-275- SKU:
- SWI140-500-275
- Availability:
- Ships Same Business Day
- Weight:
- 7.15 LBS
- Spring Rate:
- 275 lb.
- Spring Height:
- 14"
- Spring ID:
- 5"
$136.85Qty in Cart: 0Quantity:Price:$136.85Subtotal: -
Conventional Rear Spring 14in x 5in x 250lb 140-500-250
SWIFT SPRINGS
$136.85A stiffer rear spring rate demands precision engineering, and this 250 lb/in conventional coil spring delivers predictable suspension geometry for track-focused setups. Whether you're tuning a dedicated race car or upgrading a performance build, this...SWI140-500-250- SKU:
- SWI140-500-250
- Availability:
- Ships Same Business Day
- Weight:
- 9.15 LBS
- Spring Rate:
- 250 lb.
- Spring Height:
- 14"
- Spring ID:
- 5"
$136.85 -
Conventional Rear Spring 14in x 5in x 225lb 140-500-225
SWIFT SPRINGS
$128.35A properly matched rear spring is critical for maintaining consistent suspension geometry and predictable handling characteristics on the track or strip. This 225 lb/in conventional coil spring delivers the stiffness needed for performance applications...SWI140-500-225- SKU:
- SWI140-500-225
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- Spring Rate:
- 225 lb.
- Spring Height:
- 14"
- Spring ID:
- 5"
$128.35 -
Conventional Rear Spring 14in x 5in x 200lb 140-500-200
SWIFT SPRINGS
$119.85A properly tuned rear suspension begins with the right spring rate, and this 200 lb/in conventional coil spring delivers the responsive handling and consistent load support that serious racers and performance enthusiasts demand. Whether you're...SWI140-500-200- SKU:
- SWI140-500-200
- Availability:
- Ships Same Business Day
- Weight:
- 7.91 LBS
- Spring Rate:
- 200 lb.
- Spring Height:
- 14"
- Spring ID:
- 5"
$119.85 -
Conventional Rear Spring 14in x 5in x 175lb 140-500-175
SWIFT SPRINGS
$119.85A properly rated rear spring is fundamental to suspension geometry and vehicle handling dynamics. The 175 lb/in spring rate in this conventional coil spring delivers predictable load support for street and strip applications, while the 14-inch length and...SWI140-500-175- SKU:
- SWI140-500-175
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- Spring Rate:
- 175 lb.
- Spring Height:
- 14"
- Spring ID:
- 5"
$119.85 -
Coilover Spring 14in x 3.0in x 80lb 140-300-080
SWIFT SPRINGS
$111.35Fine-tuning suspension geometry requires a coilover spring that delivers consistent, predictable spring rates without compromise. This 80 lb/in spring provides the mid-range stiffness ideal for road racing and street performance builds where you need...SWI140-300-080- SKU:
- SWI140-300-080
- Availability:
- Ships Same Business Day
- Weight:
- 3.91 LBS
- Spring Rate:
- 80 lb.
- Spring Height:
- 14"
- Spring ID:
- 3"
$111.35 -
Coilover Spring 14in x 3.0in x 50lb 140-300-050
SWIFT SPRINGS
$111.35A properly tuned suspension starts with the right spring rate, and this 50 lb/in coilover spring delivers the linear response and predictable handling characteristics your setup demands. Whether you're dialing in a road course platform or fine-tuning a...SWI140-300-050- SKU:
- SWI140-300-050
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- Spring Rate:
- 50 lb.
- Spring Height:
- 14"
- Spring ID:
- 3"
$111.35 -
Barrel Spring 12in x 2.5in x 125# 120-250-125 B
SWIFT SPRINGS
$111.35Coil springs are critical suspension components that directly impact handling, ride quality, and load capacity. This barrel spring's 125 lb/in rate makes it ideal for applications requiring moderate spring stiffness without excessive harshness—whether...SWI120-250-125B- SKU:
- SWI120-250-125B
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- Spring Rate:
- 125 lb.
- Spring Height:
- 12"
- Spring ID:
- 2.5"
$111.35 -
Spring Conventional 8.00in x 5in x 550lb 080-500-550 F
SWIFT SPRINGS
$140.25A proper coil spring is foundational to any suspension system that demands consistent load handling and predictable geometry. With a stiff 550 lb/in rate, this conventional spring delivers the support needed for track-focused builds, performance street...SWI080-500-550F- SKU:
- SWI080-500-550F
- Availability:
- Ships Same Business Day
- Weight:
- 5.75 LBS
- Spring Rate:
- 550 lb.
- Spring Height:
- 8"
- Spring ID:
- 5"
$140.25Qty in Cart: 0Quantity:Price:$140.25Subtotal: -
Spring Conventional 8.00in x 5in x 500lb 080-500-500 F
SWIFT SPRINGS
$140.25A 500 lb/in spring rate delivers the responsive suspension tuning you need for track-focused applications where consistency and predictability matter. This conventional coil spring provides a solid foundation for custom suspension builds, whether you're...SWI080-500-500F- SKU:
- SWI080-500-500F
- Availability:
- Ships Same Business Day
- Weight:
- 5.50 LBS
- Spring Rate:
- 500 lb.
- Spring Height:
- 8"
- Spring ID:
- 5"
$140.25Qty in Cart: 0Quantity:Price:$140.25Subtotal: -
Spring Conventional 8.00in x 5in x 475lb 080-500-475 F
SWIFT SPRINGS
$140.25A properly matched spring rate is fundamental to suspension tuning, and this 475 lb/in conventional coil spring delivers the stiffness needed for controlled weight transfer and consistent handling during high-performance driving. Whether you're building...SWI080-500-475F- SKU:
- SWI080-500-475F
- Availability:
- Ships Same Business Day
- Weight:
- 6.00 LBS
- Spring Rate:
- 475 lb.
- Spring Height:
- 8"
- Spring ID:
- 5"
$140.25Qty in Cart: 0Quantity:Price:$140.25Subtotal:
