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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XRP #16 Flare Cap XRP992916
XRP-XTREME RACING PROD.
$11.99Protect your high-pressure fluid lines from contamination and unwanted leakage with a precision-engineered flare cap designed for serious racing applications. XRP's aluminum construction and anodized finish resist corrosion while maintaining a secure...XRP992916- SKU:
- XRP992916
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MFG Part #:
- 992916
$11.99 -
XRP #10 Flare Cap XRP992910
XRP-XTREME RACING PROD.
$7.99A quality flare cap is essential for protecting your fuel or fluid line connections from contamination and accidental leaks—particularly critical in high-vibration racing environments where loose fittings can compromise system integrity. The XRP #10...XRP992910- SKU:
- XRP992910
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MFG Part #:
- 992910
$7.99 -
XRP #6 Flare Cap XRP992906
XRP-XTREME RACING PROD.
$5.89Properly capped AN fittings are essential to prevent fluid leakage, contamination, and system failure in high-performance fuel and coolant lines. The XRP #6 Flare Cap provides a reliable, corrosion-resistant seal that withstands pressure cycles and...XRP992906- SKU:
- XRP992906
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 992906
$5.89Qty in Cart: 0Quantity:Price:$5.89Subtotal: -
XRP #4 Flare Cap XRP992904
XRP-XTREME RACING PROD.
$3.99Protect your AN fuel and fluid lines from contamination and moisture with the XRP #4 Flare Cap. This precision-engineered aluminum cap seals your high-performance fuel system during storage, transport, or when disconnecting hoses for maintenance. The...XRP992904- SKU:
- XRP992904
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 992904
$3.99 -
XRP #3 Flare Cap XRP992903
XRP-XTREME RACING PROD.
$3.49Protect your AN fittings from contamination and fluid loss with the XRP #3 Flare Cap. This aluminum cap seals unused 3 AN ports with precision engineering, ensuring your fuel, oil, or coolant lines stay clean and leak-free during assembly, storage, or...XRP992903- SKU:
- XRP992903
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 992903
$3.49 -
XRP #12 Straight Thread Plug XRP981412
XRP-XTREME RACING PROD.
$10.99A quality plug fitting is essential for any high-performance fuel system, cooling loop, or custom plumbing application—preventing leaks under pressure while maintaining system integrity. The XRP #12 Straight Thread Plug delivers reliable sealing with a...XRP981412- SKU:
- XRP981412
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- 981412
$10.99 -
XRP #10 Straight Theaded Plu XRP981410
XRP-XTREME RACING PROD.
$7.99If you're running a high-performance fuel system, brake circuit, or forced induction setup, you need fittings that won't leak under pressure. The XRP #10 Straight Threaded Plug delivers the reliability of a hex-head design with the corrosion resistance...XRP981410- SKU:
- XRP981410
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 981410
$7.99 -
XRP #8 Straight Thread Plug XRP981408
XRP-XTREME RACING PROD.
$5.59A quality plug fitting is non-negotiable in high-performance fuel, oil, and coolant systems where reliability determines race day success. XRP's #8 straight thread plug delivers the precision engineering and durability you need to seal critical ports...XRP981408- SKU:
- XRP981408
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 981408
$5.59 -
XRP Plug St Thread #6 XRP981406
XRP-XTREME RACING PROD.
$3.99A quality AN fitting system demands reliable, leak-free components at every connection point. The XRP Plug St Thread #6 delivers the precision engineering needed to seal your high-pressure fuel, oil, or coolant lines with confidence. Whether you're...XRP981406- SKU:
- XRP981406
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 981406
$3.99 -
XRP #12 Flare Plug XRP980612
XRP-XTREME RACING PROD.
$7.99Proper AN fitting connections are non-negotiable in high-performance fuel and fluid systems—any leak compromises reliability and safety. The XRP #12 Flare Plug delivers a precision-machined solution for sealing unused AN ports, eliminating the risk of...XRP980612- SKU:
- XRP980612
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- 980612
$7.99 -
XRP #10 Flare Plug XRP980610
XRP-XTREME RACING PROD.
$5.79When you're building a high-performance fuel or coolant system, every connection point matters—and that's where a quality AN flare plug becomes non-negotiable. The XRP #10 Flare Plug delivers a secure, leak-free seal without the guesswork, backed by...XRP980610- SKU:
- XRP980610
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 980610
$5.79 -
XRP #6 Flare Plug XRP980606
XRP-XTREME RACING PROD.
$2.99When you're running high-pressure fuel, coolant, or brake lines, you need fittings you can trust to hold under extreme conditions. The XRP #6 Flare Plug delivers a solid, leak-free seal in 6 AN applications without the bulk of traditional plugs. Whether...XRP980606- SKU:
- XRP980606
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- 980606
$2.99 -
XRP #4 Male Flare Plug XRP980604
XRP-XTREME RACING PROD.
$2.99A quality flare plug is essential for sealing fuel and fluid lines in high-performance fuel systems where reliability can't be compromised. This XRP #4 male flare plug delivers a secure, leak-free connection using industry-standard AN fittings—critical...XRP980604- SKU:
- XRP980604
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 980604
$2.99 -
Inspection Plug w/O-Ring Bell 2216
TIGER QUICK CHANGE
$26.99Maintaining engine integrity means having reliable access to critical inspection points without compromising seals or aesthetics. This aluminum inspection plug with integrated O-ring seal provides a leak-free solution for Tiger 10-inch side bells,...TIG2216- SKU:
- TIG2216
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- MFG Part #:
- 2216
$26.99 -
P/C 1/2 NPT Pipe Plug 662063
RUSSELL
$8.95A quality pipe plug is essential for sealing off unused NPT ports on your fuel system, cooling lines, or custom fabrication work—preventing leaks, contamination, and pressure loss that can compromise performance. This CNC-compatible aluminum plug threads...RUS662063- SKU:
- RUS662063
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 662063
$8.95 -
P/C 3/8 NPT Pipe Plug 662053
RUSSELL
$7.95A quality pipe plug is essential for maintaining system integrity in high-performance applications where leaks compromise both safety and efficiency. This 3/8 NPT aluminum plug delivers reliable sealing with a clean, professional appearance that...RUS662053- SKU:
- RUS662053
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 662053
$7.95 -
1/8 NPT Pipe Plug Allen Socket Black 662033
RUSSELL
$6.95Seal off unused ports and prevent fluid leakage with a precision-engineered aluminum plug that won't corrode or fail under pressure. The Allen socket head design allows quick installation and removal without specialized tools, making it ideal for custom...RUS662033- SKU:
- RUS662033
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- 662033
$6.95 -
Flare Cap #10 661980
RUSSELL
$12.95A properly sealed hydraulic or fuel system depends on quality fittings and caps that won't leak under pressure or high temperatures. This 10 AN flare cap delivers the reliability you need for competitive racing or serious engine builds, with a durable...RUS661980- SKU:
- RUS661980
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- 661980
$12.95 -
Peterson Fluid D/Sump Fit. 12an Plug 08-0505
PETERSON FLUID
$6.99A quality sump fitting is critical for maintaining clean fluid circulation in high-performance applications where contamination or fitting failure can compromise engine protection. This Peterson D/Sump fitting delivers reliable, leak-free sealing with a...PTR08-0505- SKU:
- PTR08-0505
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- MFG Part #:
- 08-0505
$6.99 -
Peterson Fluid Tank Fitting -6an Plug 08-0504
PETERSON FLUID
$4.99Fluid system integrity depends on reliable, leak-free connections—and this Peterson plug delivers exactly that. The 6AN fitting standard ensures compatibility with premium fluid systems, while the aluminum construction and o-ring seal guarantee...PTR08-0504- SKU:
- PTR08-0504
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 08-0504
$4.99
