The Forge Motorsport actuator is designed to replace the original actuator on the TD04 turbocharger in the Volvo V40. The original part numbers are 49377-06351 and Volvo 8627991.
It enables more precise adjustment and control of the required boost pressure, which can improve turbocharger response and boost pressure control. A spring suitable for the factory boost pressure or slightly higher values is fitted as standard. A stronger spring is also available for vehicles with more extensive modifications.
- Spring selection according to the vehicle and intended use
- Made from 6026-grade aluminium
- Application-specific design for the vehicle and turbocharger
- Option to operate with a piston or diaphragm mechanism on most actuators
- Diaphragm made from Nomex-reinforced fluorosilicone
- Laser-cut stainless steel brackets where specified
- Adjustment and service kits are available
Diaphragm-sealed internals are the standard configuration for this actuator. Piston-sealed internals are also available, providing equivalent performance and less maintenance thanks to the durable piston design.
The actuator is fitted as standard with a green-coded spring. To use the FMPACTUN spring adjustment kit, the Diaphragm Type 2, 049 version must be selected.
All actuator rods are made from 303-grade stainless steel.
The stated spring pressures represent the minimum regulated pressures. On older turbocharged engines without regulation via the ECU or a solenoid valve, the colour codes refer to the mechanical part of the operation. On modern engines with regulation via the ECU or a solenoid valve, the mechanical spring specification does not necessarily correspond to the target boost pressure. The correct spring should be selected by a qualified tuner according to the vehicle and the planned level of modification.
The kit includes:
- 1 × FMACV40 actuator
- 1 × Forge sticker
Suitable for: Volvo S40 I (644), Volvo V40 I (645).
Compatible vehicles (manufacturer data)
| Vehicle | Chassis | Years | Engine |
|---|---|---|---|
| Volvo V40/S40 T5 | V40/S40 | 1996–2000 | — |
Before ordering, check that the product matches your vehicle (model, year and engine). If in doubt, write to us — we will check for you.

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