Carburetor Adapters and Spacers
Circle Track Race Car Carburetor Adapters & Spacers at JJ Motorsports
Adapt your circle track race car's carburetor setup with premium adapters and spacers from JJ Motorsports, designed for precise flange matching, improved airflow, and customizable height in high-RPM racing conditions. These high-quality aluminum spacers and adapter plates ensure secure mounting, reduced turbulence, and reliable performance for dirt track, oval, and stock car applications, helping you achieve better throttle response and power delivery on the track.
Shop top brands like Allstar Performance and Holley for race-proven reliability. Explore related categories such as Circle Track Carburetors & Components, Circle Track Air & Fuel, or Circle Track Racing for jets, intakes, and exhaust to complete your carburetion setup and dominate the track with total confidence across all race conditions, from short ovals to high-bank superspeedways.
Top Circle Track Race Car Carburetor Adapters & Spacers
- Holley Carburetor Spacer 1/4in Phenolic 20-99 – Phenolic 1/4" spacer for Holley 4150 carbs; reduces heat soak and improves velocity.
- Allstar Performance Carburetor Adapter Plate ALL75071 – Billet adapter for 4150 to 4500 flange; precision CNC-machined for leak-free fit.
- Quick Fuel Carburetor Spacer 1/2in Aluminum QFT-30-129 – Aluminum 1/2" spacer for Q-Series carbs; enhances plenum volume for better distribution.
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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On Sale
Wehrs Carb Spacer Tuning System 2in Tall Restrictor Plate WEHWM302B
WEHRS MACHINE
MSRP: $120.99Now: $119.00Was: $120.99A carburetor spacer isn't just a spacer—it's a tuning tool that directly impacts intake charge velocity, fuel atomization, and throttle response. The Wehrs 2" tall design creates the breathing room your engine needs to deliver consistent power gains...WEHWM302B- SKU:
- WEHWM302B
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- MFG Part #:
- WM302B
MSRP: $120.99Now: $119.00Was: $120.99 -
Carburetor Spacer - 4150 1in Open L/W WLS000010
WILSON MANIFOLDS
$168.00A properly spaced carburetor sits at the optimal distance from your intake manifold, improving fuel atomization and throttle response while reducing heat soak from engine bay temperatures. This lightweight aluminum spacer adds critical separation without...WLS000010- SKU:
- WLS000010
- Availability:
- Ships Same Business Day
- Weight:
- 0.72 LBS
- MFG Part #:
- 10
$168.00 -
Carburetor Spacer 2063
TRANS-DAPT
$31.99A carburetor spacer is a proven tuning tool that increases the distance between your carburetor and intake manifold, improving fuel atomization and allowing cooler, denser air charge into the engine. This results in more complete combustion, better...TRA2063- SKU:
- TRA2063
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- MFG Part #:
- 2063
$31.99 -
.500 Super Sucker Alm. Carb Spacer - 4150 SS4150-.5AL
HIGH VELOCITY HEADS
$129.99A quality carburetor spacer is essential for optimizing fuel distribution and engine breathing. The .500 Super Sucker delivers precise air-fuel metering while the polished aluminum construction resists corrosion and heat buildup. Bolt this onto your...HVHSS4150-.5AL- SKU:
- HVHSS4150-.5AL
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
- MFG Part #:
- SS4150-.5AL
$129.99 -
Allstar Performance Angled Carb Spacer 4150 ALL25975
ALLSTAR PERFORMANCE
$264.99Take your engine's performance to the next level with the Allstar Performance Angled Carb Spacer. Designed to improve fuel atomization and increase plenum volume, this precision-crafted spacer helps unlock more power and throttle response right where you...ALL25975- SKU:
- ALL25975
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
- MFG Part #:
- ALL25975
$264.99 -
On Sale
Wehrs Carb Adapter 2bbl to 4bbl Holey 1in Thick WM10-100
WEHRS MACHINE
MSRP: $105.99Now: $104.00Was: $105.99If you're stepping up from a 2-barrel to a 4-barrel carburetor setup, this adapter is essential for maintaining proper fuel delivery and airflow characteristics. The Wehrs design eliminates the guesswork with precision engineering, while the tapered...WEHWM10-100- SKU:
- WEHWM10-100
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
MSRP: $105.99Now: $104.00Was: $105.99 -
On Sale
Wehrs Carb Spacer Tunnin Sys 1in Tall WEHWM301B
WEHRS MACHINE
MSRP: $86.99Now: $85.00Was: $86.99Carburetors need precision intake manifold spacing to optimize fuel atomization and airflow dynamics—this Wehrs spacer system delivers exactly that with a restrictive tuning plate that fine-tunes your air-fuel mixture for measurable horsepower gains. The...WEHWM301B- SKU:
- WEHWM301B
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
MSRP: $86.99Now: $85.00Was: $86.99Qty in Cart: 0Quantity:Price:MSRP: $86.99Now: $85.00Was: $86.99Subtotal: -
On Sale
Wehrs Carb Insert 1in Tall 1.450in Diameter WEHWM301-1.450
WEHRS MACHINE
MSRP: $51.99Now: $51.00Was: $51.99Restrictor plate inserts are critical components in sanctioned racing classes where engine displacement is controlled to maintain competitive parity. The Wehrs Carb Insert delivers precise airflow limitation through a CNC-machined aluminum construction,...WEHWM301-1.450- SKU:
- WEHWM301-1.450
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
MSRP: $51.99Now: $51.00Was: $51.99 -
On Sale
Wehrs Carb Insert 1in Tall 1.250in Diameter WEHWM301-1.250
WEHRS MACHINE
MSRP: $51.99Now: $51.00Was: $51.99Precise fuel delivery control is essential for competitive racing, and the Wehrs Carb Insert gives you the exact air-fuel mixture adjustment you need without fabricating custom solutions. This restrictor plate insert integrates seamlessly into the Wehrs...WEHWM301-1.250- SKU:
- WEHWM301-1.250
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
MSRP: $51.99Now: $51.00Was: $51.99 -
On Sale
Wehrs Carb Insert 1in Tall 1.125in Diameter WEHWM301-1.125
WEHRS MACHINE
MSRP: $51.99Now: $51.00Was: $51.99Restrictor plate inserts are critical for class-legal racing where fuel consumption and performance limits are strictly regulated. This Wehrs carb insert gives you precise control over fuel delivery in a compact, bolt-on package that integrates...WEHWM301-1.125- SKU:
- WEHWM301-1.125
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
MSRP: $51.99Now: $51.00Was: $51.99 -
On Sale
Wehrs Carb Insert 1in Tall 1.00in Diameter WEHWM301-1.0
WEHRS MACHINE
MSRP: $51.99Now: $51.00Was: $51.99Carburetor restrictor plates are essential for classes requiring fuel mixture limitation—this Wehrs insert gives you precise bore control without guesswork. Built from quality aluminum and engineered to exact specifications, it integrates seamlessly into...WEHWM301-1.0- SKU:
- WEHWM301-1.0
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
MSRP: $51.99Now: $51.00Was: $51.99Qty in Cart: 0Quantity:Price:MSRP: $51.99Now: $51.00Was: $51.99Subtotal: -
On Sale
Wehrs Carb Insert 1in Tall Open WEHWM301-0
WEHRS MACHINE
MSRP: $51.99Now: $51.00Was: $51.99Restrictor plate inserts are critical for competition classes with strict displacement or intake regulations—this Wehrs unit gives you precise control over air flow while maintaining reliability through a full racing season. The 1-inch height positions...WEHWM301-0- SKU:
- WEHWM301-0
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
MSRP: $51.99Now: $51.00Was: $51.99 -
On Sale
Wehrs Carb Adapter Alum 4412 to 4150 Slider 1in Tall WEHWM206100
WEHRS MACHINE
MSRP: $125.99Now: $123.00Was: $125.99If you're upgrading from a 2-barrel Holley carb to a 4-barrel setup, this adapter is essential for a clean, reliable transition without extensive manifold modification. The CNC-machined aluminum construction ensures precise throttle response and fuel...WEHWM206100- SKU:
- WEHWM206100
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
MSRP: $125.99Now: $123.00Was: $125.99 -
1/2In Phenolic Spacer - Open R9139
RACING POWER CO-PACKAGED
$29.99Carburetor spacers are essential for optimizing fuel distribution and managing heat transfer in high-performance engine builds. The 1/2" phenolic construction provides superior insulation compared to aluminum, reducing fuel vaporization and maintaining...RPCR9139- SKU:
- RPCR9139
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$29.99 -
1/2In Phenolic Spacer - Ported R9138
RACING POWER CO-PACKAGED
$32.99Phenolic spacers are essential for carburetor tuning—they create thermal isolation between your intake manifold and carburetor, reducing fuel vaporization and improving throttle response consistency. This ported R9138 is a direct bolt-on solution that...RPCR9138- SKU:
- RPCR9138
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
$32.99 -
2In Phenolic Carp Space r - Open R9137
RACING POWER CO-PACKAGED
$44.99A quality carburetor spacer is essential for optimizing fuel distribution, reducing heat transfer to your intake manifold, and maintaining consistent air-fuel mixture across all cylinders. This 2-inch phenolic spacer delivers thermal insulation that...RPCR9137- SKU:
- RPCR9137
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
$44.99 -
1In Phenolic Carb Space r - Open R9136
RACING POWER CO-PACKAGED
$39.99A quality carburetor spacer is essential for optimizing your intake manifold's thermal and volumetric efficiency. Phenolic material provides superior insulation compared to aluminum, reducing heat transfer from the engine block to the carburetor and fuel...RPCR9136- SKU:
- RPCR9136
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$39.99 -
2In Phenolic Carb Space r - Ported R9135
RACING POWER CO-PACKAGED
$45.99A phenolic carburetor spacer increases the distance between your carb and intake manifold, promoting cooler fuel charge temperatures and reducing vapor lock—especially critical in high-heat racing environments. The R9135's 2-inch thickness and ported...RPCR9135- SKU:
- RPCR9135
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
$45.99 -
1In Phenolic Carb Space r- Ported R9134
RACING POWER CO-PACKAGED
$42.99Phenolic carburetor spacers reduce underhood heat transfer to your fuel charge, promoting denser air intake and more consistent jetting across ambient conditions. By isolating your carb from engine block temperatures, you'll gain measurable gains in...RPCR9134- SKU:
- RPCR9134
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
$42.99 -
Dart Phenolic Carb Spacer 1in 4150 Flange 62100002
DART
$70.81A phenolic carb spacer creates critical thermal isolation between your carburetor and intake manifold, reducing fuel vaporization and improving throttle response across the RPM range. The 1-inch thickness on this Dart unit strikes the optimal balance...DRT62100002- SKU:
- DRT62100002
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$70.81
