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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- Price
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AED 6.5 Alcohol Power Valve 5065A
ADVANCED ENGINE DESIGN
$9.99Precise 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 air-fuel ratios across your engine's operating range,...AED5065A- SKU:
- AED5065A
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5065A
$9.99 -
AED 6.5 Power Valve 5065
ADVANCED ENGINE DESIGN
$9.99The 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 the fuel mixture during acceleration and wide-open...AED5065- SKU:
- AED5065
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5065
$9.99 -
AED 5.5 Power Valve 5055
ADVANCED ENGINE DESIGN
$9.99The 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 single-stage power valve responds precisely to engine...AED5055- SKU:
- AED5055
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5055
$9.99 -
AED 4.5 Power Valve 5045
ADVANCED ENGINE DESIGN
$9.99The 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 of vacuum, this single-stage valve ensures consistent...AED5045- SKU:
- AED5045
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5045
$9.99 -
AED 3.5 Power Valve 5035
ADVANCED ENGINE DESIGN
$9.99The 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 inches, this single-stage valve ensures your engine...AED5035- SKU:
- AED5035
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5035
$9.99 -
AED 2.5 Alcohol Power Valve 5025A
ADVANCED ENGINE DESIGN
$9.99The 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 catastrophic failure. This single-stage power valve...AED5025A- SKU:
- AED5025A
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5025A
$9.99Qty in Cart: 0Quantity:Price:$9.99Subtotal: -
AED 2.5 Power Valve 5025
ADVANCED ENGINE DESIGN
$9.99The 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 vacuum, enriching the fuel mixture during acceleration and...AED5025- SKU:
- AED5025
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 5025
$9.99 -
Holley Power Valve 125-125
HOLLEY
$31.96A 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 Holley 125-125 delivers consistent high-flow performance...HLY125-125- SKU:
- HLY125-125
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- 125-125
$31.96
