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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Allstar Performance Allen Plugs NPT 1/4in Steel 2pk ALL49812
ALLSTAR PERFORMANCE
$2.79NPT port plugs are essential for sealing unused fittings on your engine block, cylinder head, or fuel system—preventing fluid leaks and contamination that compromise reliability. These Allstar Performance plugs deliver a secure, repeatable seal with a...ALL49812- SKU:
- ALL49812
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
$2.79 -
Allstar Performance Allen Plugs NPT 1/8in Steel 2pk ALL49811
ALLSTAR PERFORMANCE
$2.79Properly sealing your engine block, cylinder head, or fuel system requires fittings that won't leak under pressure and won't strip under torque. These Allstar Performance Allen plugs deliver reliable, corrosion-resistant sealing for NPT ports commonly...ALL49811- SKU:
- ALL49811
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$2.79 -
Allstar Performance Allen Plug NPT 3/4in ALL49805
ALLSTAR PERFORMANCE
$7.99When you're building a high-performance engine bay, every port and passage matters—and that includes the fittings you use to seal them. The Allstar Performance Allen Plug NPT 3/4in delivers a clean, reliable solution for blocking off unused ports without...ALL49805- SKU:
- ALL49805
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$7.99 -
Allstar Performance Allen Plug NPT 1/2in ALL49804
ALLSTAR PERFORMANCE
$5.99When you're building a high-performance engine or hydraulic system, port management matters—and every open fitting needs a reliable plug. The Allstar Performance Allen Plug delivers a clean, secure closure with a design engineered for racing applications...ALL49804- SKU:
- ALL49804
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$5.99 -
Allstar Performance Allen Plugs NPT 3/8in 2pk ALL49803
ALLSTAR PERFORMANCE
$5.99Allen head plugs are essential for any racing application where clean aesthetics and reliable sealing matter. These Allstar Performance plugs provide a professional appearance while delivering dependable performance in high-vibration environments. The...ALL49803- SKU:
- ALL49803
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$5.99 -
Allstar Performance Allen Plugs NPT 1/4in 2pk ALL49802
ALLSTAR PERFORMANCE
$4.99Allen head plugs are essential for any serious build—they provide a clean, professional appearance while offering superior grip for installation and removal compared to standard hex fittings. These Allstar Performance plugs seal NPT ports reliably,...ALL49802- SKU:
- ALL49802
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$4.99 -
Allstar Performance Allen Plugs NPT 1/8in 2pk ALL49801
ALLSTAR PERFORMANCE
$4.99Clean up your engine bay and eliminate unnecessary port clutter with these precision-engineered aluminum plugs. Whether you're running a fresh block or retrofitting an existing setup, these Allen head plugs provide a reliable, professional-grade solution...ALL49801- SKU:
- ALL49801
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$4.99 -
Allstar Performance Allen Plugs NPT 1/16in 2pk ALL49800
ALLSTAR PERFORMANCE
$4.99These Allen head plugs provide a clean, secure way to seal off unused NPT ports on your engine block, manifold, or fuel system without sacrificing aesthetics or functionality. The black anodized aluminum construction resists corrosion while maintaining a...ALL49800- SKU:
- ALL49800
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$4.99 -
Allstar Performance AN Plug -16 ALL49686
ALLSTAR PERFORMANCE
$11.99A secure, leak-free hydraulic or fuel system depends on quality fittings that won't fail under pressure. The Allstar Performance AN Plug -16 delivers the reliability professional racers and serious enthusiasts demand, with precision engineering and...ALL49686- SKU:
- ALL49686
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$11.99 -
Allstar Performance AN Plug -12 ALL49685
ALLSTAR PERFORMANCE
$8.39A reliable -12 AN plug is essential for any high-performance fuel, oil, or coolant system—especially when you're running custom plumbing and need leak-free connections under pressure. This Allstar Performance hex-head plug delivers the precision fit and...ALL49685- SKU:
- ALL49685
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$8.39 -
Allstar Performance AN Plug -10 ALL49684
ALLSTAR PERFORMANCE
$5.99A reliable AN fitting is non-negotiable in high-performance fuel and fluid systems where leaks aren't an option. This Allstar hex-head plug delivers the secure, dead-reliable connection your racing or street build demands. Whether you're sealing off...ALL49684- SKU:
- ALL49684
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$5.99 -
Allstar Performance AN Plug -8 ALL49683
ALLSTAR PERFORMANCE
$5.99An AN-8 plug is essential for any custom fuel system, coolant line, or hydraulic circuit where you need a reliable, leak-free termination. This Allstar Performance hex head design seats cleanly without requiring special tools, making it ideal for engine...ALL49683- SKU:
- ALL49683
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$5.99 -
Allstar Performance AN Plug -6 ALL49682
ALLSTAR PERFORMANCE
$3.19Fluid system integrity depends on reliable fittings that won't leak under pressure or vibration. The Allstar Performance AN Plug -6 delivers a secure, dead-simple solution for plugging -6 AN ports during testing, storage, or system configuration. Built...ALL49682- SKU:
- ALL49682
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$3.19 -
Allstar Performance AN Plug -4 ALL49681
ALLSTAR PERFORMANCE
$2.99A reliable AN plug is non-negotiable in high-performance fuel and fluid systems where leaks compromise both safety and performance. This Allstar Performance hex-head plug delivers secure, leak-free sealing in -4 AN line applications, making it essential...ALL49681- SKU:
- ALL49681
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$2.99 -
Allstar Performance AN Plug -3 ALL49680
ALLSTAR PERFORMANCE
$2.99When you're running high-pressure fuel, oil, or coolant lines, you need fittings that won't fail under load. The Allstar Performance AN Plug -3 delivers the reliability your race engine demands—a straightforward, no-compromise solution for sealing AN...ALL49680- SKU:
- ALL49680
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$2.99 -
Allstar Performance AN Cap -16 ALL49676
ALLSTAR PERFORMANCE
$12.99Fluid system leaks compromise performance and reliability on the track or street. The Allstar Performance AN Cap -16 seals off unused -16 AN ports with precision-engineered simplicity, preventing contamination and fluid loss. This is essential hardware...ALL49676- SKU:
- ALL49676
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
$12.99Qty in Cart: 0Quantity:Price:$12.99Subtotal: -
Allstar Performance AN Cap -12 ALL49675
ALLSTAR PERFORMANCE
$10.99A proper AN fitting cap is essential for any high-performance fuel or coolant system—it seals off unused ports and prevents fluid contamination and pressure loss. The Allstar Performance AN Cap -12 is CNC-machined from aerospace-grade aluminum and...ALL49675- SKU:
- ALL49675
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$10.99 -
Allstar Performance AN Cap -10 ALL49674
ALLSTAR PERFORMANCE
$7.99Fluid system leaks waste performance and create safety hazards on the track or street. The Allstar Performance AN Cap -10 provides a reliable, dead-simple solution for sealing unused -10 AN ports in your fuel, coolant, or brake lines. Built from anodized...ALL49674- SKU:
- ALL49674
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$7.99 -
Allstar Performance AN Cap -8 ALL49673
ALLSTAR PERFORMANCE
$5.99Properly capping AN fluid lines prevents contamination, air leaks, and system degradation in high-performance racing applications. Whether you're running fuel, coolant, or brake lines, this Allstar Performance cap ensures a secure, reliable seal that...ALL49673- SKU:
- ALL49673
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$5.99 -
Allstar Performance AN Cap -6 ALL49672
ALLSTAR PERFORMANCE
$3.99A quality AN cap is essential for protecting your fuel, oil, and coolant lines from contamination and pressure loss. This Allstar Performance cap provides a secure, leak-free seal on -6 AN fittings—a critical component for maintaining system integrity in...ALL49672- SKU:
- ALL49672
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
$3.99
