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 Base Plate Inserts 1.050 4pk for 1/2in Spacer ALL26179
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts — precision-engineered to deliver consistent, reliable airflow control right where you need it. Designed specifically for Allstar's 1/2 in restrictor plate,...ALL26179- SKU:
- ALL26179
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MFG Part #:
- ALL26179
$38.99 -
Allstar Performance Base Plate Inserts 1.400 4pk for 1in Spacer ALL26069
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts — precision-engineered to deliver reliable, consistent airflow restriction every time you hit the track. Designed specifically for Allstar's 1-inch restrictor...ALL26069- SKU:
- ALL26069
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- MFG Part #:
- ALL26069
$38.99 -
Allstar Performance Base Plate Inserts 1.350 4pk for 1in Spacer ALL26068
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts (ALL26068) — precision-machined aluminum inserts designed to deliver consistent, reliable airflow restriction every time you hit the track. Engineered...ALL26068- SKU:
- ALL26068
- Availability:
- Ships Same Business Day
- Weight:
- 1.07 LBS
- MFG Part #:
- ALL26068
$38.99 -
Allstar Performance Base Plate Inserts 1.300 4pk for 1in Spacer ALL26067
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts (ALL26067) — precision-engineered aluminum inserts designed to fit perfectly with your Allstar 1-inch restrictor plate. Whether you're fine-tuning airflow for a...ALL26067- SKU:
- ALL26067
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MFG Part #:
- ALL26067
$38.99 -
Allstar Performance Base Plate Inserts 1.250 4pk for 1in Spacer ALL26066
ALLSTAR PERFORMANCE
$38.99Keep your engine breathing right and your performance dialed in with the Allstar Performance Base Plate Inserts (ALL26066). Designed specifically for use with the Allstar 1-inch restrictor plate, these precision aluminum inserts make swapping...ALL26066- SKU:
- ALL26066
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- MFG Part #:
- ALL26066
$38.99 -
Allstar Performance Base Plate Inserts 1.200 4pk for 1in Spacer ALL26065
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts (ALL26065) — precision-crafted aluminum inserts designed to give you consistent, reliable airflow control every time you hit the track. Whether you're...ALL26065- SKU:
- ALL26065
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- MFG Part #:
- ALL26065
$38.99 -
Allstar Performance Base Plate Inserts 1.150 4pk for 1in Spacer ALL26064
ALLSTAR PERFORMANCE
$38.99Keep your race setup dialed in with the Allstar Performance Base Plate Inserts (ALL26064) — precision-machined components designed to deliver consistent, reliable airflow restriction every time you hit the track. Built specifically for Allstar's 1-inch...ALL26064- SKU:
- ALL26064
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- MFG Part #:
- ALL26064
$38.99 -
Allstar Performance Base Plate Inserts 1.100 4pk for 1in Spacer ALL26063
ALLSTAR PERFORMANCE
$38.99Keep your restrictor plate setup dialed in with the Allstar Performance Base Plate Inserts (ALL26063) — a must-have for racers who demand precision and consistency at every event. Engineered from lightweight aluminum, these inserts drop right into your...ALL26063- SKU:
- ALL26063
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MFG Part #:
- ALL26063
$38.99 -
Allstar Performance Base Plate Inserts 1.000 4pk for 1in Spacer ALL26062
ALLSTAR PERFORMANCE
$38.99Keep your engine's air-fuel mixture dialed in with precision using the Allstar Performance Base Plate Inserts (ALL26062). Engineered specifically for Allstar's 1-inch restrictor plate, these aluminum inserts deliver consistent, reliable performance lap...ALL26062- SKU:
- ALL26062
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MFG Part #:
- ALL26062
$38.99 -
Allstar Performance Base Plate Inserts .950 4pk for 1in spacer ALL26061
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts — the perfect solution for fine-tuning your restrictor plate setup with precision and reliability. Engineered for serious racers, these aluminum inserts drop...ALL26061- SKU:
- ALL26061
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
- MFG Part #:
- ALL26061
$38.99 -
Allstar Performance Adjustable Base Plate 1in ALL26060
ALLSTAR PERFORMANCE
$75.99Take full control of your carburetor setup with the Allstar Performance Adjustable Base Plate (ALL26060) — a precision-engineered solution for racers who demand consistency and tunability. Whether you're dialing in fuel flow or optimizing your restrictor...ALL26060- SKU:
- ALL26060
- Availability:
- Ships Same Business Day
- Weight:
- 1.83 LBS
- MFG Part #:
- ALL26060
$75.99 -
Allstar Performance Base Plate Inserts 1.050 4pk for 1in Spacer ALL26059
ALLSTAR PERFORMANCE
$38.99Keep your engine running at peak performance with the Allstar Performance Base Plate Inserts (ALL26059) — precision-machined components designed to give you reliable, consistent airflow control right out of the box. Built specifically for Allstar's...ALL26059- SKU:
- ALL26059
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- MFG Part #:
- ALL26059
$38.99 -
Allstar Performance Adjustable Angled Carb Spacer ALL25977
ALLSTAR PERFORMANCE
$369.99Fine-tune your engine's performance with the Allstar Performance Adjustable Angled Carb Spacer (ALL25977) — a precision-engineered solution for optimizing carburetor angle and improving fuel atomization. The adjustable design gives you the flexibility to...ALL25977- SKU:
- ALL25977
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- MFG Part #:
- ALL25977
$369.99 -
Allstar Performance Carburetor Shear Plate 4500 2.125 in Bores Dominator Flange ALL25973
ALLSTAR PERFORMANCE
$99.99If your race engine is running a big cam with heavy overlap, you already know how tough it can be to keep the vacuum signal strong and consistent — that's exactly where the Allstar Performance Carburetor Shear Plate ALL25973 steps in. Engineered with a...ALL25973- SKU:
- ALL25973
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MFG Part #:
- ALL25973
$99.99 -
Allstar Performance Carburetor Shear Plate 4500 2.000 Bore Aluminum ALL25972
ALLSTAR PERFORMANCE
$99.99If you're running a high-overlap cam and struggling with poor throttle response or a weak vacuum signal, the Allstar Performance Carburetor Shear Plate (ALL25972) is exactly what your race engine needs. Precision-machined from aircraft-grade 6061-T6...ALL25972- SKU:
- ALL25972
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- ALL25972
$99.99Qty in Cart: 0Quantity:Price:$99.99Subtotal: -
Allstar Performance Carburetor Shear Plate 1/2" Thick 1-3/4" Bores Square Bore Aluminum ALL25970
ALLSTAR PERFORMANCE
$99.99If you're running a high-overlap cam and struggling with a weak vacuum signal, the Allstar Performance Carburetor Shear Plate (ALL25970) is exactly what your race engine needs. By building a low-pressure dam beneath the throttle plates, this...ALL25970- SKU:
- ALL25970
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MFG Part #:
- ALL25970
$99.99 -
Air Flow Research 1in Phenolic 4150 Carb Spacer Tapered 4 4460
AIR FLOW RESEARCH
$41.00Unlock more power and throttle response with the Air Flow Research 1" Phenolic 4150 Carb Spacer — a simple upgrade that delivers real-world performance gains. Designed for serious enthusiasts, this tapered 4-hole spacer improves air-fuel mixture and...AFR4460- SKU:
- AFR4460
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- MFG Part #:
- 4460
$41.00 -
Air Flow Research 1in Phenolic 4150 Carb Spacer Open Clover 4450
AIR FLOW RESEARCH
$41.00Unlock more power and throttle response with the Air Flow Research 1" Phenolic 4150 Carb Spacer — a simple upgrade that can make a noticeable difference in your engine's performance. The open clover design promotes improved airflow and fuel atomization,...AFR4450- SKU:
- AFR4450
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MFG Part #:
- 4450
$41.00 -
On Sale
Wehrs Q-Jet Carb Adapter 1in Thick WEHWM10Q500
WEHRS MACHINE
MSRP: $75.99Now: $74.00Was: $75.99If you're running a square bore carb on a spread bore intake manifold—or vice versa—this adapter is essential for making the connection work without costly machine shop modifications. The Wehrs Q-Jet adapter solves fitment mismatches while maintaining...WEHWM10Q500- SKU:
- WEHWM10Q500
- Availability:
- Ships Same Business Day
- Weight:
- 1.87 LBS
- MFG Part #:
- WM10Q500
MSRP: $75.99Now: $74.00Was: $75.99 -
Mr. Gasket Phenolic 1in Open 3405
MR. GASKET
$58.15Carburetor spacers are a proven, cost-effective way to improve engine performance without replacing your entire intake manifold. The Mr. Gasket Phenolic 1in Open spacer increases plenum volume and improves fuel atomization, translating to better throttle...MRG3405- SKU:
- MRG3405
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MFG Part #:
- 3405
$58.15
