Intake Manifold Adapter Kit for Predator & Honda GX
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✅90-Day Warranty
Nibbi Racing is committed to providing high-quality products and ensuring customer satisfaction. As part of this commitment, we offer a 90-day warranty on products purchased directly from our website. This warranty covers manufacturing defects and other issues that may arise under normal use.
The 90-day warranty begins on the date the customer receives the product. During this period, Nibbi Racing will repair or replace any product that is found to be defective in material or workmanship.
✅Delivery & Return
Shipping:
Order Processing: Orders are processed within 1-2 business days.
Shipping: Various shipping options available; standard (12-18 days), expedited (8-12 days).
Tracking provided.
Shipping Rates: Calculated based on destination, method, and weight/size.
International Shipping: Available; customers responsible for customs duties and fees.
Return:
Eligibility: Returns accepted within 30 days of receipt for refund or exchange. Items must be unused, in original packaging, and proof of purchase is required.
Return Process: Contact customer service for Return Authorization (RA) number and instructions.
Return shipping costs are the customer's responsibility unless due to defect or error.
Refunds: Processed within 4-6 business days after receiving the return. Issued to the original payment method.
Exchanges: Contact customer service to arrange. Subject to availability.
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We accept credit card, Master, Visa, Paypal, shopify payment, etc. For any issues or questions regarding payments, please contact our customer service team.
INTAKE MANIFOLD ADAPTER KIT
BUILT FOR BETTER AIRFLOW.
Upgrade your engine's intake setup with the NIBBI Racing Intake Manifold Adapter Kit. Precision CNC-machined from high-strength aluminum alloy, this manifold is designed to connect compatible large-displacement engines with the NIBBI PWK34 carburetor. Its smooth internal passage, secure connection design, and optional vacuum pulse port make it a practical solution for performance-focused engine builds.
The Connection Behind Your Performance
A dependable intake connection is essential for consistent engine operation. The NIBBI Intake Manifold Adapter Kit creates a connection between your carburetor and engine, helping deliver the air-fuel mixture through a smooth, securely sealed intake passage.
Smooth Intake Passage
The precisely machined internal passage is designed to minimize unnecessary intake restrictions and support smooth air-fuel mixture delivery to the engine.
Strong Aluminum Construction
Built from high-strength aluminum alloy with a black anodized finish, the manifold offers durability, corrosion resistance, and reliable performance in demanding engine environments.
Ready for Custom Builds
A pre-drilled vacuum pulse port supports compatible pulse-type fuel pump installations, while the removable brass plug allows the port to remain sealed when not in use.
Precision-Machined.
Built to Last.
The NIBBI intake manifold features solid billet aluminum construction, shaped through precision CNC machining for a clean and consistent finish.
Its smooth internal surface helps reduce unnecessary airflow resistance, while carefully machined mating surfaces support proper sealing when installed with compatible components.
The black anodized finish provides an additional layer of corrosion resistance and gives the manifold a sleek, performance-inspired look.
Engineered for Demanding Builds
- ✓ High-strength billet aluminum construction
- ✓ Precision CNC-machined surfaces
- ✓ Smooth internal intake passage
- ✓ Black anodized protective finish
- ✓ Corrosion and heat-resistant construction
- ✓ Designed for secure, leak-resistant installation
DESIGNED TO WORK WITH NIBBI PWK34.
Take your intake upgrade further with the NIBBI Racing PWK34 Carburetor. This manifold adapter kit is designed to provide a compatible mounting connection for the PWK34's 40 mm engine-side spigot.
Together, the manifold and carburetor create the foundation for a customizable intake setup on compatible engines. Carburetor tuning and additional installation adjustments may be required depending on your engine build.
34 mm Bore | 40 mm Engine-Side OD
PWK34 carburetor sold separately.
Built for Popular Engine Platforms
Designed for selected Predator, Honda GX-Series, and Briggs & Stratton engines, this intake manifold adapter offers a convenient starting point for carburetor upgrades on mini bikes, go-karts, and other compatible small-engine applications.
Predator Engines
- Predator 301cc (8 HP)
- Predator 420cc (13 HP)
Honda Engines
- Honda GX240
- Honda GX270
- Honda GX340
- Honda GX390
Briggs Engines
- Briggs 1450 Series
- 305cc Engine
Compatibility Reminder: Please verify your engine model, intake mounting pattern, carburetor connection dimensions, and available installation clearance before purchasing.
Pre-Drilled Vacuum Pulse Port
The integrated vacuum pulse port adds flexibility for custom fuel system installations. Designed to provide an intake vacuum signal where compatible, this port can support certain pulse-type fuel pump configurations without additional manifold drilling or tapping.
Standard Setup — Port Sealed
When a pulse-type fuel pump is not being used, install the brass plug to securely seal the vacuum port. Proper sealing prevents unwanted air from entering the intake system and helps maintain consistent engine operation.
Pulse Fuel Pump Setup
For a compatible pulse-type fuel pump installation, replace the brass plug with the vacuum barb fitting and connect the appropriate pulse hose. Confirm that your fuel pump supports an intake-manifold vacuum signal.
Secure Fit.
Reliable Connection.
A properly sealed connection between the carburetor and engine is essential for predictable throttle response and reliable engine operation.
The high-temperature-resistant silicone coupling provides a flexible connection between compatible intake components, while the stainless steel clamp helps maintain a secure fit during operation.
Together with the precision aluminum manifold, these components support a stable intake connection with reduced risk of air leakage when correctly installed.
Reliable Connection Details
- ✓ High-temperature-resistant silicone connector
- ✓ Corrosion-resistant stainless steel clamp
- ✓ Secure carburetor-to-manifold connection
- ✓ Precision-machined surfaces for proper mating
- ✓ Designed to help minimize intake air leaks
Straightforward Installation. Built for Your Next Upgrade.
With the correct engine mounting pattern and compatible intake components, the NIBBI manifold offers a practical solution for custom carburetor installations.
Mount the Manifold
Position the intake manifold against the engine's intake mounting surface. Use the appropriate gasket and mounting hardware, ensuring correct alignment and sealing.
Connect the Carburetor
Attach the compatible carburetor using the silicone coupling. Secure the connection with the appropriate clamp and confirm the carburetor is properly supported.
Check & Fine-Tune
Seal or connect the vacuum port as required. Inspect all connections for leaks, verify throttle operation, and tune the carburetor for your engine configuration.
Technical Specifications
| Product Name | Intake Manifold Adapter Kit |
|---|---|
| Brand | NIBBI Racing |
| Manifold Material | CNC-Machined Aluminum Alloy |
| Surface Finish | Black Anodized |
| Compatible NIBBI Carburetor | PWK34 — 40 mm Engine-Side Spigot Outer Diameter |
| Coupling Material | High-Temperature-Resistant Silicone |
| Clamp Material | Stainless Steel |
| Vacuum Port | Pre-Drilled Port for Compatible Pulse-Type Fuel Pump Applications |
| Vacuum Port Options | Brass Sealing Plug / Vacuum Barb Fitting |
| Compatible Engine Families | Predator 301cc / 420cc; Honda GX240 / GX270 / GX340 / GX390; Briggs 1450 Series 305cc |
| Potential Applications | Mini Bikes, Go-Karts, and Other Compatible Small-Engine Equipment |
Check Your Setup Before You Order
While this manifold is designed for selected popular engine platforms, successful installation depends on the specific engine configuration and the components used in your intake system.
Before Purchasing
1. Confirm Your Engine Model
Check your exact engine model
and compare the intake flange
mounting pattern with the
original manifold.
2. Verify Carburetor Dimensions
This kit is designed for the
NIBBI PWK34 carburetor with
a 40 mm engine-side spigot.
Other carburetors require
dimensional verification.
3. Check Installation Clearance
Ensure sufficient clearance
for the carburetor, air filter,
throttle cable, frame, and
surrounding engine components.
4. Configure the Vacuum Port
Use the brass sealing plug
when no compatible pulse
fuel pump connection is
required. Never leave the
vacuum port open.
Frequently Asked Questions
Find answers to common queries regarding product, installation, services, and more.
How can I identify a genuine NIBBI Racing product?
All genuine NIBBI Racing products are packaged in official NIBBI Racing branded boxes. To ensure authenticity and after-sales support, please purchase through the NIBBI Racing official website or authorized dealers.
Does Nibbi offer installation instructions for products?
Yes, we provide installation instructions for most of our products. If you need further assistance, our support team is available for guidance.
Can I return or exchange my order?
Yes, we accept returns and exchanges within 30 days. The product must be unused and in its original packaging. For more details, please refer to our "Refund Policy" page.
What should I do if my product arrives damaged?
If your product arrives damaged, please contact our customer service team immediately. We’ll guide you through the return or replacement process. Make sure to provide clear photos of the damage for a quicker resolution.
What is the warranty policy for Nibbi products?
We offer 90-day warranty on all of our products, covering manufacturing defects. The warranty does not cover damage from misuse, accidents, or wear and tear. For warranty claims, please contact our customer service team with proof of purchase.
Does Nibbi offer any discounts or promotions?
We offer periodic promotions and discounts throughout the year. Subscribe to our newsletter or follow us on Instagram #nibbiracing for the latest offers and updates.
How do I contact customer support?
You can reach our customer support team via the contact form on our website, email us at customer@nibbiracing.com, or call us at our customer service number +1 (510)230-7223.
