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
$21.50Proper 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 for sealing 16 AN ports without the need for thread...EARAT981416ERL- SKU:
- EARAT981416ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- AT981416ERL
$21.50 -
Earls Port Plug O-Ring Seal 12an (1pk) AT981412ERL
EARLS
$17.20Port 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 ensures a reliable, repeatable seal with its precision...EARAT981412ERL- SKU:
- EARAT981412ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- AT981412ERL
$17.20Qty in Cart: 0Quantity:Price:$17.20Subtotal: -
Earls #10 Port Plug Ano-Tuff AT981410ERL
EARLS
$11.45When 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 precision-engineered design that seals tight and stays put...EARAT981410ERL- SKU:
- EARAT981410ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MFG Part #:
- AT981410ERL
$11.45 -
Earls #8 Port Plug Ano-Tuff AT981408ERL
EARLS
$8.59When 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 most—sealing off unused 8 AN ports with a proven O-ring...EARAT981408ERL- SKU:
- EARAT981408ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- AT981408ERL
$8.59 -
Earls 3/8NPT Ano-Tuff Internal Plug AT593204ERL
EARLS
$14.35When 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 that: corrosion-resistant aluminum construction with a...EARAT593204ERL- SKU:
- EARAT593204ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- AT593204ERL
$14.35 -
Earls NPT Plug Allen Head 1/8 NPT (2pk) AT593202ERL
EARLS
$11.47Leaking 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 reliability, keeping your system clean and protected. The...EARAT593202ERL- SKU:
- EARAT593202ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MFG Part #:
- AT593202ERL
$11.47 -
Earls Cap Plug 6an (2pk) AT592906ERL
EARLS
$10.38Fluid 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 circuit, fuel system, or hydraulic setup, having matched...EARAT592906ERL- SKU:
- EARAT592906ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- AT592906ERL
$10.38 -
Earls Cap Plug 4an (2pk) AT592904ERL
EARLS
$11.48Keeping 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, effective way to cap off unused -4 AN ports without...EARAT592904ERL- SKU:
- EARAT592904ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- AT592904ERL
$11.48 -
Earls Cap Plug 3an (2pk) AT592903ERL
EARLS
$11.44Proper 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 AN ports, preventing fluid loss and contamination in...EARAT592903ERL- SKU:
- EARAT592903ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- AT592903ERL
$11.44Qty in Cart: 0Quantity:Price:$11.44Subtotal: -
Earls #6 Ano-Tuff Port Plug AT581406ERL
EARLS
$11.47Leaking 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, coolant, or oil lines—eliminating the need for temporary or...EARAT581406ERL- SKU:
- EARAT581406ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MFG Part #:
- AT581406ERL
$11.47 -
Earls AN Plug 6an (2pk) AT580606ERL
EARLS
$7.10AN 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 provide a clean, professional way to cap off unused ports on...EARAT580606ERL- SKU:
- EARAT580606ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- AT580606ERL
$7.10 -
Earls AN Plug 3an (2pk) AT580603ERL
EARLS
$7.10When 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 trusted durability, giving you the clean, professional...EARAT580603ERL- SKU:
- EARAT580603ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MFG Part #:
- AT580603ERL
$7.10Qty in Cart: 0Quantity:Price:$7.10Subtotal: -
Earls 3/4in Pipe Plug 993206ERL
EARLS
$7.52If 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 reliability with its aluminum construction and NPT...EAR993206ERL- SKU:
- EAR993206ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 993206ERL
$7.52 -
Earls 1/2in Pipe Plug 993205ERL
EARLS
$8.61When 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 seal with minimal hassle—just thread it in and tighten...EAR993205ERL- SKU:
- EAR993205ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- 993205ERL
$8.61 -
Earls #12 Cap 992912ERL
EARLS
$17.20A 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. This Earls #12 cap delivers reliable closure with a...EAR992912ERL- SKU:
- EAR992912ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MFG Part #:
- 992912ERL
$17.20 -
Earls #10 Cap 992910ERL
EARLS
$12.88Protect 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 racing setup demands, whether you're running fuel,...EAR992910ERL- SKU:
- EAR992910ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 992910ERL
$12.88 -
Earls #8 Cap 992908ERL
EARLS
$10.02A 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 Cap delivers reliable sealing in a compact, lightweight...EAR992908ERL- SKU:
- EAR992908ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 992908ERL
$10.02 -
Earls #10 Port Plug 981410ERL
EARLS
$11.45When 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 sealed, secure solution with aerospace-grade...EAR981410ERL- SKU:
- EAR981410ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 981410ERL
$11.45 -
Earls #10 Flare Plug 980610ERL
EARLS
$14.35If 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 integrity your racing or street application demands, with...EAR980610ERL- SKU:
- EAR980610ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 980610ERL
$14.35 -
Earls #8 Flare Plug 980608ERL
EARLS
$5.71If 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 precision-machined aluminum construction. Whether...EAR980608ERL- SKU:
- EAR980608ERL
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 980608ERL
$5.71
