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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Allstar Performance Full Throttle Inserts Non-Restricting ALL26190
ALLSTAR PERFORMANCE
$38.99If you're running a restrictor plate setup, airflow management is critical to maintaining consistent performance across heat cycles and race conditions. These Allstar Full Throttle Inserts give you precise control over intake restriction without...ALL26190- SKU:
- ALL26190
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$38.99 -
Carb. Adapter - 2300 to 4150 - L/W Tapered WLS044330
WILSON MANIFOLDS
$270.00If you're adapting a Holley 2-barrel carb to a square-bore intake manifold, this adapter delivers a secure, lightweight solution without compromising fuel delivery or air flow. The tapered design ensures proper seating and consistent performance across...WLS044330- SKU:
- WLS044330
- Availability:
- Ships Same Business Day
- Weight:
- 1.68 LBS
- MFG Part #:
- 44330
$270.00 -
Carb. Adapter - 2300 to 4150 - L/W Tapered WLS044111
WILSON MANIFOLDS
$192.00If you're stepping up from a 2300-series Holley carburetor to a square-bore 4150 setup, this adapter is your direct path to compatibility without sourcing custom fabrication. The tapered lightweight design minimizes induction heat while maintaining the...WLS044111- SKU:
- WLS044111
- Availability:
- Ships Same Business Day
- Weight:
- 1.77 LBS
- MFG Part #:
- 44111
$192.00 -
Carburetor Spacer - 4150 1in 4-Hole L/W Tapered WLS014210
WILSON MANIFOLDS
$250.80Carburetor spacers optimize air velocity and fuel atomization by increasing the distance between your carb and intake manifold—critical for maximizing horsepower and throttle response on high-performance engines. This lightweight aluminum spacer reduces...WLS014210- SKU:
- WLS014210
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
- MFG Part #:
- 14210
$250.80 -
Carburetor Spacer - 4150 2in 4-Hole L/W Tapered WLS004150
WILSON MANIFOLDS
$276.00A carburetor spacer is essential for optimizing manifold heat dynamics and improving fuel atomization in carbureted engines. This 2-inch tapered design provides a thermal barrier that keeps incoming charge temperatures consistent, directly improving...WLS004150- SKU:
- WLS004150
- Availability:
- Ships Same Business Day
- Weight:
- 1.27 LBS
- MFG Part #:
- 4150
$276.00 -
Carburetor Spacer - 4150 1.5in 4-Hole L/W Tapered WLS004130
WILSON MANIFOLDS
$250.80A carburetor spacer is essential for optimizing airflow, improving throttle response, and enhancing fuel atomization in your engine bay. This tapered, lightweight design reduces heat transfer from the intake manifold while maintaining precise carburetor...WLS004130- SKU:
- WLS004130
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- MFG Part #:
- 4130
$250.80 -
Carburetor Spacer - 4150 1in 4-Hole L/W Tapered WLS004110
WILSON MANIFOLDS
$216.00A carburetor spacer is one of the most cost-effective upgrades for unlocking hidden performance in your engine. By optimizing air/fuel distribution and flow velocity through the carburetor, this spacer improves throttle response, part-throttle...WLS004110- SKU:
- WLS004110
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MFG Part #:
- 4110
$216.00 -
Angled Carb Spacer 4150 2in 4-Hole Tapered WLS003150
WILSON MANIFOLDS
$336.00An angled carburetor spacer is essential for optimizing fuel distribution and air velocity through your intake manifold, particularly in forced induction or high-rpm applications where atomization directly impacts combustion efficiency. This 2-inch...WLS003150- SKU:
- WLS003150
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- MFG Part #:
- 3150
$336.00 -
Carburetor Spacer - 4150 2in Open L/W WLS000050
WILSON MANIFOLDS
$198.00A carburetor spacer is a critical component for optimizing fuel delivery and manifold temperature control on carbureted engines. This lightweight 4150 spacer reduces heat transfer from the intake manifold to the carburetor, improving fuel atomization and...WLS000050- SKU:
- WLS000050
- Availability:
- Ships Same Business Day
- Weight:
- 0.99 LBS
- MFG Part #:
- 50
$198.00Qty in Cart: 0Quantity:Price:$198.00Subtotal: -
Carburetor Spacer - 4150 1.5in Open L/W WLS000030
WILSON MANIFOLDS
$168.00A carburetor spacer bridges the gap between your intake manifold and carb, improving fuel atomization and air distribution across all cylinders. The 1.5-inch thickness provides optimal runner length tuning for better throttle response and mid-range...WLS000030- SKU:
- WLS000030
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- MFG Part #:
- 30
$168.00 -
Weiand Carb Adapter Plate WEI9006
WEIAND
$39.61If you're running a square-bore carburetor on an engine designed for spread-bore intake manifolds, this adapter plate is essential for proper fitment and fuel delivery. The Weiand 9006 converts your carb mounting interface without compromising airflow or...WEI9006- SKU:
- WEI9006
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MFG Part #:
- 9006
$39.61 -
On Sale
Wehrs Carb Insert 2in Tall 1.450in Diameter WEHWM302-1.450
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99When competition demands precision fuel delivery and consistent carburetor performance, a properly sized restrictor plate insert is non-negotiable. The Wehrs Carb Insert provides exact bore control to regulate fuel and air mixture, ensuring repeatable...WEHWM302-1.450- SKU:
- WEHWM302-1.450
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- WM302-1.450
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Insert 2in Tall 1.400in Diameter WEHWM302-1.400
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Fuel restriction rules require precision, and the Wehrs Carb Insert delivers exactly that. This CNC-machined aluminum spacer maintains consistent bore diameter across sanctioned racing classes, eliminating guesswork and ensuring your carburetor stays...WEHWM302-1.400- SKU:
- WEHWM302-1.400
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- WM302-1.400
MSRP: $85.99Now: $84.00Was: $85.99Qty in Cart: 0Quantity:Price:MSRP: $85.99Now: $84.00Was: $85.99Subtotal: -
On Sale
Wehrs Carb Insert 2in Tall 1.350in Diameter WEHWM302-1.350
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Precise intake restriction is critical for classes requiring carburetor spacer systems, and the Wehrs Carb Insert delivers the exact bore diameter and height needed for consistent, rule-compliant performance. This aluminum restrictor plate insert...WEHWM302-1.350- SKU:
- WEHWM302-1.350
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- WM302-1.350
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Insert 2in Tall 1.300in Diameter WEHWM302-1.300
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Enforce precise fuel mixture control and meet restrictor plate regulations with the Wehrs Carb Insert—a CNC-machined aluminum spacer that maintains consistent carburetor bore diameter across sanctioned racing classes. This bolt-on insert eliminates...WEHWM302-1.300- SKU:
- WEHWM302-1.300
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- WM302-1.300
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Insert 2in Tall 1.250in Diameter WEHWM302-1.250
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Carb restrictors are essential for maintaining fair competition and engine protection across multiple racing classes. This Wehrs restrictor plate insert gives you precise bore control in a compact 2-inch package, ensuring compliance with series...WEHWM302-1.250- SKU:
- WEHWM302-1.250
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MFG Part #:
- WM302-1.250
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Insert 2in Tall 1.125in Diameter WEHWM302-1.125
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Air restrictors are essential for bracket racing and spec-class competition where precise carburetor control directly impacts ET consistency and win lights. This Wehrs carb insert maintains exact air-fuel ratios by limiting induction flow, ensuring...WEHWM302-1.125- SKU:
- WEHWM302-1.125
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MFG Part #:
- WM302-1.125
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Insert 2in Tall 1.00in Diameter WEHWM302-1.0
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Precision fuel delivery control is essential when you're dialing in carburetor performance, and a properly sized restrictor insert is the difference between peak power and wasted potential. This Wehrs carb insert gives you the exact metering you need for...WEHWM302-1.0- SKU:
- WEHWM302-1.0
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MFG Part #:
- WM302-1.0
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Insert 2in Tall Open WEHWM302-0
WEHRS MACHINE
MSRP: $85.99Now: $84.00Was: $85.99Restrictor plate inserts are essential for racers competing in classes with carb-tower height restrictions. This Wehrs 2-inch open-bore insert maintains your existing carburetor setup while bringing you into compliance without sacrificing airflow or...WEHWM302-0- SKU:
- WEHWM302-0
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- MFG Part #:
- WM302-0
MSRP: $85.99Now: $84.00Was: $85.99 -
On Sale
Wehrs Carb Adapt. 2BBl to 4BBl 1in Tall Slider WEHWM206SB
WEHRS MACHINE
MSRP: $100.99Now: $99.00Was: $100.99If you're upgrading from a 2-barrel carb to a square-bore 4-barrel setup, this adapter is essential for a clean, reliable transition without custom fabrication. The Wehrs 1-inch tall design maintains proper carb-to-manifold spacing while preserving fuel...WEHWM206SB- SKU:
- WEHWM206SB
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- MFG Part #:
- WM206SB
MSRP: $100.99Now: $99.00Was: $100.99
