GFB Mitsubishi

• Blow-off & diverter valves - Hybrid Dual Port, Respons Dual Port Variable, Mach 2 recirculating plumb-back and Deceptor Pro II electronic valves listed for Evo applications.
• Wastegate actuators - GFB WGA internal wastegate actuators listed for Evo 4-8, Evo 9, Evo X and Lancer Ralliart.
• Pulleys - Lightweight underdrive crank pulley listed for Lancer Evo 7/8/9.
• Accessories - Hose blanking plugs, recirculation hose adaptors, springs and fittings are listed separately as universal items.

Mitsubishi listings are identified by generation and chassis code, so check the code on the product title against your car. Common codes include CD9A (Evo 1), CE9A (Evo 2/3), CN9A (Evo 4), CP9A (Evo 5/6), CT9A (Evo 7/8/9), CZ4A (Evo X) and CY4A (Lancer Ralliart). Valve listings may also quote an inlet size such as 33mm, so match the size to your factory valve outlet, and note whether you want a plumb-back (recirculating) or atmosphere-venting design before ordering.

Most GFB valves and actuators are supplied as direct replacements for the factory item and are fitted with basic hand tools, hose clamps and, for electronic valves, a wiring connection. Installation by a qualified professional workshop is recommended, particularly for wastegate actuators and anything that changes boost behaviour. Check local road rules and any applicable emissions or compliance requirements before fitting atmosphere-venting valves to a road-registered vehicle.

Will a GFB valve suit my Evo? Compare the chassis code in the product title (such as CT9A or CZ4A) with your vehicle's build details before ordering.

What is the difference between plumb-back and atmosphere venting? Plumb-back valves return air to the intake, while atmosphere valves vent outside; plumb-back is generally preferred on mass-airflow metered engines.

Do I need a tune after fitting? A tune is not always required for a like-for-like valve swap, but a tuner should advise if boost control components are changed.