Carburetor Power Valves and Components
Circle Track Race Car Carburetor Power Valves & Components at JJ Motorsports
Fine-tune your circle track race car's part-throttle and wide-open performance with premium Holley power valves and block-off plugs from JJ Motorsports. These high-quality components deliver precise vacuum-controlled enrichment, preventing lean spots and hesitation in high-RPM racing conditions. Available in popular 5.5" Hg and 6.5" Hg openings, plus block-off kits for full-race applications, they’re essential for dirt track, oval, and stock car setups running Holley 4150/4160 carbs.
Shop Holley power valves for race-proven reliability. Whether you're dialing in a short-track modified or a high-bank superspeedway late model, these valves pair perfectly with our jets & air bleeds or explore rebuild kits to keep your carb dialed all season.
Top Circle Track Carburetor Power Valves & Components
- Power Valve HLY125-55 – 5.5" Hg opening power valve; ideal for most circle track gas carbs with moderate vacuum.
- Power Valve HLY125-65 – 6.5" Hg opening power valve; popular choice for higher-vacuum street stock and IMCA engines.
- Power Valve Block-Off MRG1510 – Billet block-off plug with gasket; seals power valve circuit for full-race, no-enrichment setups.
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!
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AED 6.5 Alcohol Power Valve 5065A
ADVANCED ENGINE DESIGN
$10.68Precise fuel management is critical in alcohol-fueled engines, where mixture variation directly impacts power output and component longevity. The AED 6.5 Alcohol Power Valve maintains optimal...AED5065A- SKU:
- AED5065A
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5065A
$10.68 -
AED 6.5 Power Valve 5065
ADVANCED ENGINE DESIGN
$10.68The AED 6.5 Power Valve 5065 is essential for carbureted engines requiring precise fuel metering across varying load conditions. This single-stage power valve opens at 6.5 inches of vacuum, enriching...AED5065- SKU:
- AED5065
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5065
$10.68Qty in Cart: 0Quantity:Price:$10.68Subtotal: -
AED 5.5 Power Valve 5055
ADVANCED ENGINE DESIGN
$10.68The AED 5.5 Power Valve 5055 is essential for optimizing your carburetor's fuel delivery across the RPM range, ensuring consistent performance whether you're cruising or at wide-open throttle. This...AED5055- SKU:
- AED5055
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5055
$10.68 -
AED 4.5 Power Valve 5045
ADVANCED ENGINE DESIGN
$10.68The AED 4.5 Power Valve 5045 is engineered to optimize fuel delivery and engine efficiency across a wide range of operating conditions. By regulating vacuum-dependent fuel distribution at 4.5 inches...AED5045- SKU:
- AED5045
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5045
$10.68 -
AED 3.5 Power Valve 5035
ADVANCED ENGINE DESIGN
$10.68The AED 3.5 Power Valve 5035 delivers precise intake manifold control, enabling optimal fuel distribution and improved engine response across your RPM range. By regulating vacuum pressure at 3.5...AED5035- SKU:
- AED5035
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5035
$10.68 -
AED 2.5 Alcohol Power Valve 5025A
ADVANCED ENGINE DESIGN
$10.68The AED 2.5 Alcohol Power Valve 5025A is essential for fuel-injected and carbureted alcohol drag racing engines where precise fuel metering under load makes the difference between consistency and...AED5025A- SKU:
- AED5025A
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5025A
$10.68Qty in Cart: 0Quantity:Price:$10.68Subtotal: -
AED 2.5 Power Valve 5025
ADVANCED ENGINE DESIGN
$10.68The AED 2.5 Power Valve 5025 is essential for carburetor-equipped vehicles requiring precise fuel metering under varying load conditions. This single-stage power valve activates at 2.5 inches of...AED5025- SKU:
- AED5025
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5025
$10.68Qty in Cart: 0Quantity:Price:$10.68Subtotal: -
Holley Power Valve 125-125
HOLLEY
$33.24A precision-engineered power valve is essential for dialing in your carburetor's fuel delivery across the RPM band, ensuring optimal fuel economy at cruise and maximum enrichment under load. The...HLY125-125- SKU:
- HLY125-125
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 125-125
$33.24
