Specific Product Information
GFB External Wastegate Benefits
- Most compact wastegate range on the market
- Body, valve, seat and all mounting hardware is CNC machined from
high-temp stainless steel - Actuator housing CNC machined from billet 6061-T6 aluminium
- Nomex-reinforced silicone diaphragm
- Internal shroud protects valve stem from excessive
heat and prevents carbon-related sticking - V-band clamp mounting system
EX50 50mm Wastegate Features
- 50mm valve
- V-band inlet and outlet
- 133mm overall height
- Additional springs available are 7psi (inner) and 9psi (middle)
- 38mm valve
- V-band inlet and outlet (directly compatible with TiAl MV-S flanges)
- 93mm overall height
- Supplied with 13psi (outer) spring
- Combine springs to achieve base boost pressures of 7, 9, 13, 16, 20, 22 and 29psi*
- Additional inlet weld-on available separately, to suit 2” SC40 pipe
*Spring pressure rating is a guide only. Actual boost pressure achieved may be different depending on the turbo, exhaust manifold and engine combination.
Product Dimensions
| Wastegate | Inlet size | Outlet size |
| EX38 | 1.75 inch (44.4mm) O.D pipe with a thickness of atleast 0.095 inch (2.4mm) | 1.5 inch (38.1mm) O.D thin walled tube |
| EX44 | 2 inch (50.8mm) O.D pipe with a thickness of atleast 0.120 inch (3mm) | 1.75 inch (44.5mm) O.D thin walled tube |
| EX50 | 1.5 inch (48mm) nominal bore Schedule 10 or 40 pipe. | 2 inch (50mm) O.D thin walled pipe |
Use Cases:
Most aftermarket turbocharged vehicle applications.
Self-troubleshooting steps:
After installing your wastegate, I’ve found that I’m making 0 boost. What is happening?
In most cases, it’s worth noting that it is almost impossible for a wastegate to be making 0 boost. A wastegate “seemingly” making 0 boost is not an indication that it is stuck open. In most cases, we’ve found that if you’re making 0psi worth of boost – your vehicle may be in some form of limp mode due to a possible CEL code. We would recommend using an OBD2 scanner to check for all CEL codes to see if there is an underlying code causing this limp mode to be triggered.
I think there is a genuine leak from the wastegate. What can I do?
If you do believe that there is some abnormal behaviour from your wastegate, we would recommend performing a full service of the wastegate to better determine its condition. With the wastegate uninstalled from your vehicle, carefully undo the 6 screws holding the cap into position. It’s highly recommended that a press is used to prevent the cap from flying off and causing any potential damage as the cap is spring loaded. Once the cap and springs have been removed, carefully inspect the diaphragm to look for any abnormal wear such as discolouration or tears. If in the case you have noticed some abnormal wear, please feel free to contact us at [email protected] and to send us some photos of the diaphragm in question so that we’d be able to provide relevant information and feedback.
Warranty Information
We offer lifetime warranty on all of our products, so provided that there is a genuine manufacturing or assembly fault with your product – please send us some photos of what’s going on so that we’d be able to assist with either replacement parts or components. It’s also worth noting that we our lifetime warranty does not extend to those who have purchased our parts second hand.
Next steps: https://gfb.com.au/contact-us/
If you are still having some trouble, then the next steps are to contact our Tech Support team. Videos, photos and a clear description of the symptoms you are experiencing would give us a better understanding of what is going on and how to resolve this issue as quickly as possible. Remember, we can’t see your car or product, so our diagnosis is only as good as the information you provide us.
