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 Port Plug O-Ring Seal 16an (1pk) AT981416ERL
EARLS
$22.36Proper port sealing is non-negotiable in high-performance fuel and fluid systems—a single leak can compromise your entire build. The Earls Port Plug O-Ring Seal provides a reliable, reusable solution...EARAT981416ERL- SKU:
- EARAT981416ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- AT981416ERL
$22.36 -
Earls Port Plug O-Ring Seal 12an (1pk) AT981412ERL
EARLS
$17.89Port plugs are essential for sealing unused AN fittings on your fuel system, cooling lines, or custom fabrication projects—keeping contaminants out and preventing fluid leaks. This Earls 12AN plug...EARAT981412ERL- SKU:
- EARAT981412ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- AT981412ERL
$17.89 -
Earls #10 Port Plug Ano-Tuff AT981410ERL
EARLS
$11.91When you're running high-pressure fuel, oil, or coolant systems, you need fittings that won't fail under extreme conditions. The Earls #10 Port Plug delivers the reliability racers demand with a...EARAT981410ERL- SKU:
- EARAT981410ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MFG Part #:
- AT981410ERL
$11.91 -
Earls #8 Port Plug Ano-Tuff AT981408ERL
EARLS
$8.93When you're running high-flow fuel systems, turbo feeds, or custom coolant lines, you need fittings that won't leak under pressure. The Earls #8 Port Plug delivers reliability where it matters...EARAT981408ERL- SKU:
- EARAT981408ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- AT981408ERL
$8.93 -
Earls 3/8NPT Ano-Tuff Internal Plug AT593204ERL
EARLS
$14.92When you're building a custom fluid system—whether it's fuel, oil cooling, or brake lines—you need fittings you can trust to seal reliably under pressure. Earls' Ano-Tuff plugs deliver precisely...EARAT593204ERL- SKU:
- EARAT593204ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- AT593204ERL
$14.92 -
Earls NPT Plug Allen Head 1/8 NPT (2pk) AT593202ERL
EARLS
$11.93Leaking NPT ports and exposed fittings create inefficiency and look unprofessional on any high-performance build. These Earls NPT plugs seal off unused 1/8" NPT ports with precision-engineered...EARAT593202ERL- SKU:
- EARAT593202ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MFG Part #:
- AT593202ERL
$11.93 -
Earls Cap Plug 6an (2pk) AT592906ERL
EARLS
$10.80Fluid line systems demand reliable termination points, and these Earl's cap plugs provide a clean, secure closure for 6 AN ports when lines aren't in use. Whether you're running a complex coolant...EARAT592906ERL- SKU:
- EARAT592906ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- AT592906ERL
$10.80 -
Earls Cap Plug 4an (2pk) AT592904ERL
EARLS
$11.94Keeping your -4 AN fuel and coolant lines sealed is non-negotiable in high-performance applications where even minor leaks compromise reliability and safety. These Earl's cap plugs provide a simple,...EARAT592904ERL- SKU:
- EARAT592904ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- AT592904ERL
$11.94 -
Earls Cap Plug 3an (2pk) AT592903ERL
EARLS
$11.90Proper AN line termination is critical for maintaining system integrity in high-performance fuel, coolant, and brake applications. These Earls cap plugs provide a clean, reliable way to seal unused 3...EARAT592903ERL- SKU:
- EARAT592903ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- AT592903ERL
$11.90 -
Earls #6 Ano-Tuff Port Plug AT581406ERL
EARLS
$11.93Leaking AN fittings compromise system integrity and create messy, unreliable installations. These Earls Ano-Tuff port plugs provide a robust sealing solution for unused #6 AN ports on your fuel,...EARAT581406ERL- SKU:
- EARAT581406ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MFG Part #:
- AT581406ERL
$11.93 -
Earls AN Plug 6an (2pk) AT580606ERL
EARLS
$7.38AN fittings are critical components in any high-performance fuel, oil, or coolant system—they demand reliable, leak-free connections under pressure and extreme conditions. These Earls AN plugs...EARAT580606ERL- SKU:
- EARAT580606ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- AT580606ERL
$7.38 -
Earls AN Plug 3an (2pk) AT580603ERL
EARLS
$7.38When you're running a high-performance fuel or coolant system, you need reliable fittings that won't leak under pressure. These Earls AN plugs seal off unused ports with precision engineering and...EARAT580603ERL- SKU:
- EARAT580603ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MFG Part #:
- AT580603ERL
$7.38 -
Earls 3/4in Pipe Plug 993206ERL
EARLS
$5.73If you're running a custom cooling system, fuel line setup, or any pressurized circuit, you need dependable sealing solutions that won't leak under load. The Earls 3/4in Pipe Plug delivers OEM-grade...EAR993206ERL- SKU:
- EAR993206ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 993206ERL
$5.73Qty in Cart: 0Quantity:Price:$5.73Subtotal: -
Earls 1/2in Pipe Plug 993205ERL
EARLS
$8.95When you're building or modifying a fuel system, coolant line, or oil circuit, you need fittings that won't leak under pressure or vibration. This 1/2in aluminum pipe plug delivers a secure, reliable...EAR993205ERL- SKU:
- EAR993205ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- 993205ERL
$8.95 -
Earls #12 Cap 992912ERL
EARLS
$17.89A proper AN fitting cap is essential for sealing unused ports in your fuel, oil, or coolant lines—preventing contamination, fluid loss, and potential system failures during high-performance operation...EAR992912ERL- SKU:
- EAR992912ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MFG Part #:
- 992912ERL
$17.89Qty in Cart: 0Quantity:Price:$17.89Subtotal: -
Earls #10 Cap 992910ERL
EARLS
$13.40Protect your high-pressure fluid lines with a reliable, precision-engineered cap that prevents contamination and system leaks. This Earls #10 cap delivers the durability and corrosion resistance your...EAR992910ERL- SKU:
- EAR992910ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 992910ERL
$13.40Qty in Cart: 0Quantity:Price:$13.40Subtotal: -
Earls #8 Cap 992908ERL
EARLS
$10.42A quality cap fitting is essential for any pressurized fuel or fluid system—it prevents contamination, maintains system integrity, and keeps your lines secure under racing conditions. The Earls #8...EAR992908ERL- SKU:
- EAR992908ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 992908ERL
$10.42 -
Earls #10 Port Plug 981410ERL
EARLS
$11.91When you're running high-flow cooling or fuel system lines, port plugs are non-negotiable for maintaining system integrity and preventing leaks at unused fittings. The Earls #10 Port Plug delivers a...EAR981410ERL- SKU:
- EAR981410ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 981410ERL
$11.91 -
Earls #10 Flare Plug 980610ERL
EARLS
$14.92If you're running a high-performance fuel or coolant system, a reliable AN fitting is non-negotiable—leaks at speed are disasters waiting to happen. The Earls #10 Flare Plug delivers the sealed...EAR980610ERL- SKU:
- EAR980610ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 980610ERL
$14.92Qty in Cart: 0Quantity:Price:$14.92Subtotal: -
Earls #8 Flare Plug 980608ERL
EARLS
$5.94If you're building a high-performance fuel or coolant system, you need fittings that won't leak under pressure. The Earls #8 Flare Plug delivers a secure, leak-free seal with its hex-head design and...EAR980608ERL- SKU:
- EAR980608ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 980608ERL
$5.94Qty in Cart: 0Quantity:Price:$5.94Subtotal:
