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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
Shop Fabrication Parts and Materials at Black Ops Auto Works for stainless steel tubing, titanium tubing, aluminum charge piping, mandrel bends, V-band clamps, flanges, merge collectors, AN fittings, PTFE hose kits, braided fuel and oil lines, heat shields, welding supplies, brackets, bungs, and hardware for building custom exhaust systems, turbo plumbing, intercooler piping, and fuel system routing. Start with tubing in stainless, titanium, or aluminum in the right diameter and wall thickness, then add mandrel bends, flanges, V-bands, and clamps to complete the joint work. Black Ops Auto Works carries 5,866 fabrication SKUs from Vibrant Performance, Ticon Industries, Stainless Bros, Radium Engineering, Fragola, DEI, and ATP Turbo. Why Custom Fabrication Custom fabrication solves fitment problems that no universal or pre-bent kit can address. Raw tubing, flanges, and fittings give the fabricator freedom to route exhaust around a turbo, snake charge pipe around accessories, hard-...
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Exhaust flanges and V-band hardware for custom fabrication and performance exhaust builds are stocked at Black Ops Auto Works. Shop laser-cut stainless steel flanges, V-band flange pairs, OEM-pattern manifold flanges, turbo outlet flanges, and flex couplings for GM LS, Ford Coyote, Chrysler HEMI, and import turbocharged platforms. Every product is filterable by inside diameter, outside diameter, flange face style, and bolt pattern so the correct flange ships the first time. Black Ops Auto Works carries 452 flange SKUs across bolt-on and V-band styles. What This Category Covers Exhaust flanges are the bolted connection points where exhaust manifolds mate to downpipes, where sections of exhaust pipe join at catalytic converters and muffler inlets, and where aftermarket headers connect to factory or custom collector sections. Flange quality and correct material specification are critical for maintaining leak-free exhaust connections under the extreme temperature cycling that perfor...
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Vibrant
Vibrant Performance parts for custom exhaust, turbo builds, and fabrication projects are stocked at Black Ops Auto Works. Shop clamps, V-band flanges, mandrel bends, silicone couplers, wideband bungs, catalytic converters, resonators, tips, mufflers, oil catch cans, AN fittings, hoses, wastegate flanges, and fuel system fittings for street, race, drift, and off-road builds. Every product is filterable by size, material, and fitting type so the correct part ships the first time. Black Ops Auto Works carries 3,096 Vibrant Performance SKUs across exhaust fabrication, forced induction plumbing, and fuel system hardware. What This Brand Covers Vibrant Performance manufactures exhaust and fabrication parts for DIY custom exhaust, turbo builds, and general fabrication work. The catalog spans stainless mandrel bends and V-band flanges for exhaust construction, silicone couplers and hump hoses for intercooler and intake plumbing, and AN fittings and PTFE hose for fuel and oil systems. Fa...
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