Cap and Plug Fittings
Circle Track Cap and Plug Fittings at JJ Motorsports
Cap and plug fittings are essential when sealing lines or unused ports to prevent leaks and maintain pressure. These durable plugs safeguard your fluid systems during storage or between races. Integrate them with other high-quality fluid line components for a dependable racing setup.
Shop trusted brands like Allstar Performance for plastic kits and Fragola for high-flow options. Explore related categories such as Circle Track Fittings and Plugs for complete fluid system solutions or Circle Track Hoses for matching lines.
Top Circle Track Cap and Plug Fittings
- Rear End Quick Change Fitting for Filler Tank – Aluminum, Black – Upgrade your quick change rear end setup with this fitting, designed for seamless connection to a filler tank. Made from lightweight aluminum and anodized in black, this fitting replaces the side bell inspection plug.
- Allstar Performance Plastic Plug Kit ALL50810 – AN Dust Plug 3 AN-16 AN Plastic Red Kit.
- Allstar Performance Plastic Cap Kit ALL50800 – AN Dust Cap 3 AN-16 AN Plastic Red Kit.
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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Earls 3/8in Pipe Plug 593204ERL
EARLS
$14.35Clean up your hydraulic and fuel system endpoints with a solution that won't let you down. These Earls pipe plugs deliver reliable sealing in high-performance applications where leaks aren't an option. The allen head design makes installation and future...EAR593204ERL- SKU:
- EAR593204ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MFG Part #:
- 593204ERL
$14.35 -
Earls 1/8in Pipe Plug 593202ERL
EARLS
$11.45Leaking coolant ports and open fittings compromise both performance and aesthetics on a precision-built engine bay. Earls' 1/8in pipe plugs seal NPT ports cleanly with a purpose-built design that eliminates the need for makeshift solutions. Whether...EAR593202ERL- SKU:
- EAR593202ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MFG Part #:
- 593202ERL
$11.45 -
Earls #6 Caps (2 Per Pack) 592906ERL
EARLS
$11.45Protect your fluid lines and maintain system integrity with these OEM-quality Earls #6 caps. Whether you're running a street machine or circuit racer, proper line termination prevents contamination, fluid loss, and potential pressure leaks that can...EAR592906ERL- SKU:
- EAR592906ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 592906ERL
$11.45 -
Earls #4 Caps 592904ERL
EARLS
$11.45Protect your AN line fittings from contamination and fluid loss with these precision-engineered aluminum caps. Whether you're running a street machine or a dedicated race car, properly sealed fittings are essential for system integrity and preventing...EAR592904ERL- SKU:
- EAR592904ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- 592904ERL
$11.45 -
Earls #3 Caps 592903ERL
EARLS
$11.45Protect your fuel, oil, and coolant lines with reliable end caps that prevent contamination and fluid loss. These Earls #3 caps are essential for any AN-equipped fuel system, ensuring clean connections and maintaining system integrity during...EAR592903ERL- SKU:
- EAR592903ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MFG Part #:
- 592903ERL
$11.45 -
Earls #6 Port Plug 581406ERL
EARLS
$11.47A quality port plug is essential for sealing unused AN fittings on your fuel system, coolant lines, or hydraulic circuits—preventing leaks, contamination, and pressure loss where they matter most. The Earls #6 Port Plug delivers reliable, no-nonsense...EAR581406ERL- SKU:
- EAR581406ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 581406ERL
$11.47 -
Bert Drain Plug 1/4 NPT Magnetic SG-1063
BERT TRANSMISSIONS
$3.99Ferrous debris in transmission fluid is inevitable—metal particles from normal wear accumulate over time and accelerate damage to internal components. The Bert Drain Plug 1/4 NPT Magnetic captures these particles before they circulate back through your...BERSG-1063- SKU:
- BERSG-1063
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MFG Part #:
- SG-1063
$3.99 -
Allstar Performance Bleeder Caps 10pk ALL50855
ALLSTAR PERFORMANCE
$6.99Brake bleeder caps are a small but critical component in any serious brake system maintenance routine. Without quality caps protecting your bleeder screws, you risk contamination, air ingress, and corrosion that compromises braking performance and safety...ALL50855- SKU:
- ALL50855
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- ALL50855
$6.99 -
Allstar Performance `-16 Aluminum Plugs 10pk ALL50837
ALLSTAR PERFORMANCE
$14.99Keep contamination out of your AN fittings with these CNC-machined aluminum dust plugs—essential for protecting your fuel, coolant, and brake system lines during storage, transport, and maintenance. A 10-pack ensures you have plugs on hand for every -16...ALL50837- SKU:
- ALL50837
- Availability:
- Ships Same Business Day
- Weight:
- 1.07 LBS
- MFG Part #:
- ALL50837
$14.99 -
Allstar Performance `-12 Aluminum Plugs 10pk ALL50836
ALLSTAR PERFORMANCE
$9.99Dust contamination in your AN fittings can compromise fuel system integrity and engine performance, especially in high-flow racing applications. These Allstar Performance aluminum plugs provide a reliable, cost-effective solution to protect your lines...ALL50836- SKU:
- ALL50836
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MFG Part #:
- ALL50836
$9.99 -
Allstar Performance `-10 Aluminum Plugs 10pk ALL50835
ALLSTAR PERFORMANCE
$7.49Fluid and fuel system integrity depends on proper port protection, and these Allstar aluminum plugs deliver reliable sealing across your -10 AN fittings. Whether you're running a fresh engine build, modifying your fuel delivery system, or storing an...ALL50835- SKU:
- ALL50835
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- ALL50835
$7.49 -
Allstar Performance `-8 Aluminum Plugs 20pk ALL50834
ALLSTAR PERFORMANCE
$11.49Dust plugs are non-negotiable in high-performance applications—they protect your -8 AN fittings from contamination that can compromise system integrity and cause catastrophic failures. These Allstar Performance aluminum plugs deliver reliable sealing...ALL50834- SKU:
- ALL50834
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MFG Part #:
- ALL50834
$11.49 -
Allstar Performance `-6 Aluminum Plugs 20pk ALL50833
ALLSTAR PERFORMANCE
$7.89Dust and debris infiltration can compromise fluid system cleanliness and component longevity in high-performance applications. These aluminum AN plugs provide a reliable, cost-effective solution for sealing unused ports on your fuel, oil, and coolant...ALL50833- SKU:
- ALL50833
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- ALL50833
$7.89 -
Allstar Performance `-4 Aluminum Plugs 20pk ALL50832
ALLSTAR PERFORMANCE
$7.89Keeping fluid lines clean and protected is non-negotiable in any high-performance fuel or cooling system. These aluminum AN dust plugs seal unused -4 ports with precision, preventing contamination and maintaining system integrity during storage or...ALL50832- SKU:
- ALL50832
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- ALL50832
$7.89 -
Allstar Performance `-3 Aluminum Plugs 20pk ALL50831
ALLSTAR PERFORMANCE
$12.99Dust contamination in your AN fittings is a quick way to compromise fuel delivery and hydraulic system integrity. These Allstar Performance aluminum plugs provide a reliable, cost-effective solution to keep your lines clean during storage, transport, and...ALL50831- SKU:
- ALL50831
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- ALL50831
$12.99 -
Allstar Performance `-16 Aluminum Caps 10pk ALL50827
ALLSTAR PERFORMANCE
$10.99Protect your high-pressure fuel, oil, and coolant lines from contamination and debris with these precision-engineered aluminum AN caps. A complete 10-pack ensures you have dust protection for every -16 AN port on your engine bay, eliminating the need for...ALL50827- SKU:
- ALL50827
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MFG Part #:
- ALL50827
$10.99 -
Allstar Performance `-12 Aluminum Caps 10pk ALL50826
ALLSTAR PERFORMANCE
$7.99Protect your -12 AN fittings from contamination and corrosion with reliable, lightweight aluminum caps that maintain system integrity between uses. These precision-engineered dust caps prevent debris, moisture, and oxidation from compromising your fuel,...ALL50826- SKU:
- ALL50826
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- ALL50826
$7.99 -
Allstar Performance `-10 Aluminum Caps 10pk ALL50825
ALLSTAR PERFORMANCE
$7.29Protecting your -10 AN fittings from contamination and debris is critical to maintaining system integrity and preventing costly hydraulic or fuel line failures. These aluminum caps provide a simple yet essential safeguard for your high-performance...ALL50825- SKU:
- ALL50825
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MFG Part #:
- ALL50825
$7.29 -
Allstar Performance `-8 Aluminum Caps 20pk ALL50824
ALLSTAR PERFORMANCE
$10.59Protect your -8 AN fittings from contamination and environmental damage with these CNC-finished aluminum caps. Whether you're assembling a fuel system, coolant loop, or custom plumbing, proper dust protection prevents debris ingestion that can compromise...ALL50824- SKU:
- ALL50824
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- MFG Part #:
- ALL50824
$10.59 -
Allstar Performance `-6 Aluminum Caps 20pk ALL50823
ALLSTAR PERFORMANCE
$8.59Protect your AN fittings from contamination and corrosion with a reliable set of aluminum dust caps that meet industry standards. These lightweight caps prevent debris, moisture, and oxidation from compromising your fuel system, oil lines, or hydraulic...ALL50823- SKU:
- ALL50823
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- ALL50823
$8.59
