Description
Part Number: 17-90
Holley Billet Carburetor Adapter Plate – 2BBL 2300 to 4150 Flange
Seamlessly fit a 2-barrel Holley 2300 series or 2bbl XP carburetor onto a standard 4150 square bore intake manifold with this premium billet aluminum adapter plate.
Key Features & Performance Benefits
- ☑ 2BBL to 4150 Conversion: Adapts Holley 2300 Series 2-barrel carburetors (such as model 0-4412) to a 4150 square bore 4-barrel intake flange.
- ☑ Billet Aluminum Construction: Precision CNC-machined from high-grade billet aluminum for maximum structural strength and performance.
- ☑ Corrosion Resistance: Finished with a durable black anodized coating to protect against heat, oxidation, and harsh race fuels.
- ☑ Optimised Port Geometry: Features individual 1.688″ venturi throttle bores engineered to ensure clean, undisturbed air/fuel mixture distribution.
- ☑ Low-Profile Design: Measures just 0.750″ (3/4″) in height, helping maintain minimal total height for hood clearance in tight engine bays.
Technical Specifications
| Manufacturer | Holley Performance Brands |
|---|---|
| Part Number | 17-90 |
| Product Type | Carburetor Adapter Plate |
| Carburetor Flange Fitment | 2-Barrel Holley 2300 Series / 2BBL XP |
| Manifold Flange Fitment | 4150 Square Bore 4-Barrel |
| Material | CNC-Machined Billet Aluminum |
| Finish | Black Anodized |
| Height / Thickness | 0.750 in (19.05 mm) |
| Throttle Bore Diameter | 1.688 in |
| Hardware Included | Yes |
What’s Included in the Box
- 1x Holley 17-90 Black Anodized Billet Carburetor Adapter Plate
- 1x Complete Mounting Hardware Kit
Engineered by Holley, a world leader in high-performance fuel systems, the 17-90 adapter plate offers superior dimensional accuracy and racing reliability. Backed by expert support and fast dispatch throughout the UK from JP Racing.


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