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 AN Cap -4 ALL49671
ALLSTAR PERFORMANCE
$3.99A quality AN cap is non-negotiable in high-performance fuel and fluid systems—it seals your lines against pressure loss, contamination, and leaks that can cost you race day. This Allstar Performance cap delivers the reliability you need when precision...ALL49671- SKU:
- ALL49671
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$3.99 -
Allstar Performance AN Cap -3 ALL49670
ALLSTAR PERFORMANCE
$3.99A proper cap fitting is essential for maintaining system integrity in high-performance fuel and fluid lines. This Allstar Performance AN cap prevents contamination, fluid loss, and pressure leaks in -3 AN ports, making it a critical component for any...ALL49670- SKU:
- ALL49670
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$3.99 -
XRP 20 AN Male O-Ring Internal Hex Port Plug Aluminum Black Anodized XRPIHP020
XRP-XTREME RACING PROD.
$22.99Fluid leaks compromise performance and reliability in high-speed applications where every component matters. This XRP port plug seals -20 AN O-Ring Boss ports with precision, eliminating bypass paths that waste pressure and contaminate your system. The...XRPIHP020- SKU:
- XRPIHP020
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MFG Part #:
- IHP020
$22.99 -
XRP `-16 ORB Internal Hex Port Plug Alum. - Black XRPIHP016
XRP-XTREME RACING PROD.
$17.99If you're running a high-performance fuel system, cooling loop, or hydraulic circuit, you need reliable port closure that won't leak under pressure. This XRP internal hex port plug seals -16 AN ORB ports with precision-engineered reliability, using black...XRPIHP016- SKU:
- XRPIHP016
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- IHP016
$17.99 -
XRP `-12 ORB Internal Hex Port Plug Alum. - Black XRPIHP012
XRP-XTREME RACING PROD.
$12.99Fluid system leaks cost you time, money, and track position. The XRP -12 ORB Internal Hex Port Plug provides a clean, reliable solution for sealing unused AN ports on your fuel, oil, or coolant lines without compromising system integrity. Black anodized...XRPIHP012- SKU:
- XRPIHP012
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- IHP012
$12.99 -
XRP `-10 ORB Internal Hex Port Plug Alum. - Black XRPIHP010
XRP-XTREME RACING PROD.
$11.99Properly sealing your fuel, oil, and coolant ports is non-negotiable when running a custom-built engine or high-performance fuel system. The XRP -10 ORB Internal Hex Port Plug eliminates the risk of fluid leaks at critical junction points with a secure,...XRPIHP010- SKU:
- XRPIHP010
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- IHP010
$11.99 -
XRP `-8 ORB Internal Hex Port Plug - Aluminum - Black XRPIHP008
XRP-XTREME RACING PROD.
$10.99Properly sealed AN ports are critical to maintaining system integrity under high-pressure conditions. This XRP internal hex port plug eliminates potential leak points in your fuel, oil, or coolant lines with a precision-engineered aluminum construction...XRPIHP008- SKU:
- XRPIHP008
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- IHP008
$10.99 -
XRP `-4 ORB Internal Hex Port Plug - Aluminum - Black XRPIHP004
XRP-XTREME RACING PROD.
$9.99Proper port management is critical in high-performance fuel and coolant systems—open or improperly sealed AN ports can cause leaks, contamination, and catastrophic component failure. The XRP -4 ORB Internal Hex Port Plug delivers a dependable, clean...XRPIHP004- SKU:
- XRPIHP004
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- IHP004
$9.99 -
XRP `-3 ORB Internal Hex Port Plug - Aluminum - Black XRPIHP003
XRP-XTREME RACING PROD.
$6.99Unused AN ports on your fuel system, coolant lines, or brake circuits create leak points and compromise system integrity. The XRP -3 ORB Internal Hex Port Plug seals these openings with a reliable, CNC-machined solution that eliminates mess and maintains...XRPIHP003- SKU:
- XRPIHP003
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- IHP003
$6.99 -
XRP 1in Pipe Plug (Allen) XRP993207
XRP-XTREME RACING PROD.
$7.99When you're building a high-performance fuel system, cooling circuit, or custom fabrication, you need fittings that won't leak under pressure and can withstand repeated thermal cycles. The XRP 1in Pipe Plug delivers the reliability you need with a clean,...XRP993207- SKU:
- XRP993207
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- 993207
$7.99 -
XRP 3/4 Pipe Plug (Allen) XRP993206
XRP-XTREME RACING PROD.
$6.79Properly sealing NPT ports is critical to maintaining system integrity under pressure—whether you're running fuel lines, coolant passages, or hydraulic circuits. The XRP 3/4 Pipe Plug delivers a reliable, leak-free closure with a clean aesthetic that...XRP993206- SKU:
- XRP993206
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 993206
$6.79 -
XRP Allen Pipe Plug - 1/2in Black XRP993205BB
XRP-XTREME RACING PROD.
$5.59A quality port plug is essential for sealing unused manifold or block ports during custom engine builds, preventing coolant leaks and maintaining system integrity. The XRP Allen Pipe Plug combines lightweight aluminum construction with reliable NPT...XRP993205BB- SKU:
- XRP993205BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 993205BB
$5.59 -
XRP Allen Pipe Plug - 1/2in XRP993205
XRP-XTREME RACING PROD.
$4.99If you're building or maintaining a high-performance engine bay, you need reliable port plugging solutions that won't leak or corrode. XRP's aluminum pipe plugs deliver precision engineering in a compact, lightweight package—ideal for sealing NPT ports...XRP993205- SKU:
- XRP993205
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 993205
$4.99 -
XRP 3/8in Male Pipe Plug (2pk) Black XRP993204BB
XRP-XTREME RACING PROD.
$5.39XRP pipe plugs deliver reliable port sealing for your custom fuel, coolant, and vacuum systems. These black anodized aluminum fittings eliminate leaks at unused NPT ports while maintaining a clean, professional appearance under the hood. The Allen head...XRP993204BB- SKU:
- XRP993204BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 993204BB
$5.39 -
XRP 3/8in Male Pipe Plug (2pk) XRP993204
XRP-XTREME RACING PROD.
$4.99Secure your fluid system connections with XRP's precision-engineered pipe plugs. These CNC-machined aluminum fittings eliminate leaks at NPT ports while maintaining a clean, professional appearance in your engine bay or fuel system. Built for reliability...XRP993204- SKU:
- XRP993204
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 993204
$4.99 -
XRP 1/4in Allen Head Pipe Plug (2pk) Black XRP993203BB
XRP-XTREME RACING PROD.
$4.39Port plugs are essential for a clean, leak-free hydraulic or pneumatic system—whether you're sealing unused NPT ports on a custom fuel system, brake line setup, or air suspension circuit. XRP's aluminum construction resists corrosion and vibration...XRP993203BB- SKU:
- XRP993203BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 993203BB
$4.39 -
XRP 1/4in Allen Head Pipe Plug (2pk) XRP993203
XRP-XTREME RACING PROD.
$3.99XRP 1/4in Allen Head Pipe Plugs provide a reliable, corrosion-resistant solution for sealing unused NPT ports in fuel systems, coolant lines, and custom plumbing applications. The blue anodized aluminum construction resists oxidation while maintaining a...XRP993203- SKU:
- XRP993203
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 993203
$3.99 -
XRP 1/8in Allen Head Pipe Plug (2pk) Black XRP993202BB
XRP-XTREME RACING PROD.
$4.39Fluid system leaks start at the smallest openings—and a quality plug is your first line of defense. XRP's Allen Head Pipe Plugs deliver reliable sealing in tight spaces where standard plugs fall short, whether you're capping off unused ports on your...XRP993202BB- SKU:
- XRP993202BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 993202BB
$4.39 -
XRP 1/8in Allen Head Pipe Plug (2pk) XRP993202
XRP-XTREME RACING PROD.
$3.99Leaks and exposed ports compromise system integrity and aesthetics in high-performance fuel and fluid systems. XRP's aluminum pipe plugs deliver a clean, reliable seal with a professional appearance that matches precision-built engines. As a critical...XRP993202- SKU:
- XRP993202
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 993202
$3.99 -
XRP 1/16 Pipe Plug (Allen) (2pk) XRP993201
XRP-XTREME RACING PROD.
$3.99Whether you're running a custom fuel system, building a bespoke cooling circuit, or sealing off unused port locations, you need fittings that won't leak under pressure. XRP's 1/16" aluminum pipe plugs deliver reliable port closure with the precision fit...XRP993201- SKU:
- XRP993201
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 993201
$3.99
