GFB EX38 External Wastegate
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GFB EX38 38mm V Band External Wastegate
GFB has built a reputation for engineering boost control components that punch above their size, and the EX38 is no exception. Designed and manufactured in Australia under ISO 9001, this external wastegate packs serious flow into one of the most compact bodies in its class, giving tuners a reliable way to manage boost without the bulk.
This listing covers the GFB EX38 38mm V-band external wastegate, SKU 7003, suited to any turbocharged application that requires an external wastegate with a 38mm valve. It's a direct fit for turbo kits built around TiAl MV-S flanges, so it drops straight into existing setups designed for that standard.
Note: the EX38 ships standard with a 10psi (69kPa) spring. Additional 5psi (34kPa) and 7psi (48kPa) springs are sold separately and let you dial in base boost pressures of 5, 7, 10, 12, 15, 17 or 22psi (34-152kPa) through different spring combinations.
Specifications
- Valve size: 38mm
- Height: 93mm (3.7 in) — shorter than comparable external wastegates
- Body: investment cast 253MA chromium-nickel stainless steel
- Valve, seat and hardware: CNC machined high-temp stainless steel
- Actuator housing: CNC machined billet 6061 aluminium
- Diaphragm: Nomex-reinforced silicone
- Mounting: V-band clamp system, compatible with TiAl MV-S flanges
- Tapered inlet flange I.D. for smoother exhaust flow transition
- Internal shroud protects valve stem from heat and carbon build-up
- Base spring supplied: 10psi (69kPa)
- Made in Australia under ISO 9001
Flange compatibility, spring options, and installation details are provided in the tabs above. Please confirm your turbo system's wastegate flange type and boost requirements before ordering.
Not sure if this wastegate suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
Universal fitment — verify dimensions before ordering.
Technical Specifications
| Spec | Value |
|---|---|
| Valve Size | 38 mm |
| Overall Height | 93 mm (3.7 in) |
| Standard Spring Rate | 10 psi (69 kPa) |
| Available Base Boost Pressures (with optional springs) | 5 psi (34.5 kPa), 7 psi (48.3 kPa), 10 psi (68.9 kPa), 12 psi (82.7 kPa), 15 psi (103.4 kPa), 17 psi (117.2 kPa), 22 psi (151.7 kPa) |
| Body, Valve, Seat & Hardware Material | CNC machined high temp stainless steel |
| Actuator Housing Material | CNC machined billet 6061 aluminium |
| Diaphragm Material | Nomex reinforced silicone |
| Mounting System | V-band clamp |
| Flange Compatibility | TiAl MV-S flange compatible |
| Inlet Flange Feature | Tapered entry I.D. for smooth transition from exhaust pipe |
| Internal Shroud | Protects valve stem from excessive heat, prevents carbon related sticking |
| Country of Manufacture | Made in Australia under ISO 9001 |
No instructions available for this product.
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