SKU: 12676
Vibrant Performance 4in HD Clamp to 4.25in Throttle Body Transition Flange
This CNC-machined aluminum flange adapts a 4-inch heavy-duty clamp intake tube to a 4.25-inch throttle body diameter creating a seamless transition for unrestricted airflow. It suits custom intake systems on turbocharged supercharged or high-flow naturally aspirated engines delivering quicker throttle response and power gains. Perfect for fabrication projects needing precise leak-free connections.
Key Features
- 6061-T6 Aluminum Construction: Lightweight durable material resists corrosion and withstands high heat pressure in performance applications
- Precise 4in to 4.25in Transition: Smooth mandrel-bent design eliminates turbulence maintains velocity for optimal air intake efficiency
- HD Clamp Compatibility: Designed for Vibrant heavy-duty V-band clamps ensuring secure airtight seal under boost
- CNC Machined Port Matching: Factory-precision ports align perfectly with throttle body gasket reducing leaks and setup time
- Universal Fabrication Fit: Versatile for custom manifolds plenums or piping in various engine builds
Product Notes
- Pair with Vibrant 4in HD clamps and silicone couplers for complete assembly
- Inspect throttle body outer diameter to confirm 4.25in match before purchase
- Packaged to prevent shipping damage arrives ready for immediate fabrication
Installation Notes
- Professional installation recommended.
- Clean all mating surfaces with isopropyl alcohol for maximum seal integrity
- Use provided gasket or high-temp RTV torque HD clamp to 8-10 ft-lbs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Custom | Fabrication | Intake Systems |
| 1997-2023 | GM | LS-Series | All (w/4.25in TB) |
| 2004-2023 | Ford | Modular 4.6/5.4 | All (w/4.25in TB) |
| 1986-2023 | Universal | 4.25in TB Engines | Turbo/Supercharged |
Why Choose Vibrant Performance?
- Trusted brand for exhaust intake components used in racing dragstrip builds
- Manufactured with tight tolerances for reliable performance under extreme conditions
- Engineered in USA with focus on airflow dynamics and durability
Frequently Asked Questions
-
Q: Does this flange fit 4.25-inch throttle bodies from Holley FAST or Accufab?
A: Yes it matches 4.25in outer diameter throttle bodies from major brands like Holley Accufab and OEM upgrades with precise port alignment -
Q: What material and finish does it have?
A: Made from 6061-T6 aircraft-grade aluminum with natural machined finish for heat dissipation and long-term durability -
Q: What warranty covers this part and install tips?
A: Vibrant offers limited lifetime warranty against defects use anti-seize on clamp bolts and check boost levels post-install
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective box 6in x 6in x 1in
- Weight: 0.5 lbs
Fabrication
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Vibrant
Shop premium Vibrant Performance parts at Black Ops Auto Works, your trusted source for Vibrant exhaust components, resonators, mandrel bends, silicone couplers, hump hoses, AN fittings, PTFE hose ends, fabrication parts, fuel system fittings, and performance plumbing components. Vibrant Performance is known for producing high-quality exhaust fabrication and fluid transfer products engineered for fitment, durability, airflow, and race-ready reliability. Whether you are building a turbo setup, custom exhaust, intercooler piping system, fuel system, hot side charge pipe, or full race car, Vibrant products deliver the precision and performance serious builders demand. Shop Vibrant Exhaust, Fabrication & Performance Plumbing Parts At Black Ops Auto Works, we carry a wide selection of Vibrant Performance fabrication parts and plumbing components for street, race, drift, off-road, and custom builds. Popular Vibrant Product Categories: Exhaust Components & Resonators – Stainless ...
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