Internal Heat Shield Helps Protect the Valve Stem
One of the key features of the EX44 is its internal shroud, which protects the valve stem from excessive exhaust heat and helps prevent carbon-related sticking.
That design is particularly relevant for turbocharged applications exposed to high exhaust temperatures and repeated thermal cycling.
Adjustable Base Boost Spring Configuration
The EX44 is supplied with 10 psi outer and 5 psi inner springs, which can be used individually or together to provide base boost settings of 5, 10, or 15 psi.
A separate 7 psi middle spring is also available. With different spring combinations, GFB lists possible base boost settings of:
- 5 psi
- 7 psi
- 10 psi
- 12 psi
- 15 psi
- 17 psi
- 22 psi
Spring ratings are a starting point rather than a guarantee of actual boost pressure. GFB notes that the resulting boost can vary depending on the turbocharger, exhaust manifold, and engine combination.
Compact 100mm Design
The EX44 measures approximately 100mm in overall height, giving it a compact footprint for turbo manifold installations where clearance can be a major concern.
That compact design can make packaging easier without moving to a smaller wastegate valve.
Product Specifications
| Specification | Details |
|---|---|
| Brand | Go Fast Bits |
| Model | EX44 |
| Part Number | 7002 |
| Product Type | External Wastegate |
| Valve Diameter | 44mm |
| Mounting | V-Band |
| Inlet | V-Band |
| Outlet | V-Band |
| Overall Height | 100mm |
| Body Material | 253MA Chromium-Nickel Stainless Steel |
| Valve | One-Piece Stainless Steel |
| Actuator Housing | 6061 Aluminum |
| Diaphragm | Nomex-Reinforced Silicone |
| Internal Shroud | Yes |
| Standard Springs | 10 psi Outer + 5 psi Inner |
| Optional Middle Spring | 7 psi |
| TiAL Compatibility | MV-R flange compatible |
| Manufacturer | Go Fast Bits |
| Country of Manufacture | Australia |
Specifications verified against GFB’s current product information.
What’s Included
According to the GFB installation documentation, the EX44 package includes:
- Assembled EX44 wastegate
- 10 psi spring
- 5 psi spring
- Two V-band clamps
- Two 1/8-inch BSPT hose tails
- Inlet weld-on flange
- Outlet weld-on flange
- Valve seat
The supplied springs are installed in the wastegate when supplied.
Installation & Fitment Considerations
The EX44 is an external wastegate, so installation requires an appropriately designed turbo exhaust manifold and exhaust routing.
The supplied inlet and outlet weld-on fittings are intended to be incorporated into the exhaust system, with the wastegate secured using the supplied V-band clamps. GFB’s installation documentation recommends positioning the inlet where exhaust flow can reach the wastegate smoothly after the exhaust runners have merged.
This is a performance turbo component rather than a universal bolt-on replacement. Confirm your manifold design, flange configuration, available clearance, exhaust routing, and boost-control setup before installation.
Frequently Asked Questions
What size is the GFB EX44?
The EX44 uses a 44mm wastegate valve.
What is the GFB EX44 part number?
The EX44 is Go Fast Bits part #7002.
Is the EX44 an internal or external wastegate?
The EX44 is an external wastegate designed to be installed separately from the turbocharger’s internal wastegate mechanism.
What type of flange does the EX44 use?
The EX44 uses V-band inlet and outlet connections and is directly compatible with TiAL MV-R-style flanges.
What springs come with the EX44?
The standard configuration includes a 10 psi outer spring and 5 psi inner spring. Used together, they provide a nominal 15 psi base spring combination; used separately, they can provide 5 or 10 psi base spring settings.
Can the EX44 run other spring combinations?
Yes. GFB lists an optional 7 psi middle spring and various combinations that can produce nominal base spring settings from 5 through 22 psi. Actual boost can vary with the complete turbo system.
How tall is the EX44?
The EX44 has an overall height of approximately 100mm.
Is the EX44 suitable for every turbo setup?
No. The EX44 must be matched to the turbo manifold, exhaust plumbing, flange configuration, desired boost-control strategy, and available installation space.
Upgrade Your Turbo Boost-Control Hardware
The Go Fast Bits EX44 44mm External Wastegate combines a compact 100mm package with a 44mm valve, V-band mounting, high-temperature stainless-steel construction, and configurable spring combinations.
For turbo builds where exhaust-flow control, compact packaging, and durable high-temperature components are priorities, the EX44 provides a purpose-built external wastegate solution.
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