Mitsubishi Evolution Wastegate Actuator – Go Fast Bits (GFB) Internal Wastegate Actuator for 2003–2005. This bolt-on replacement sharpens boost control and response on your Lancer Evolution without adding bulk.

Engineered for compact power, the WGA uses a Silicone/Nomex diaphragm with a bead-retention design to maximize effective area while keeping size to a minimum. An 18 mm stroke gives the actuator more authority over the wastegate flap, supporting larger internal gates or added boost headroom. A pivoting spherical rod guide machined from PEEK reduces friction and wear, and the short-body housing helps packaging. Three stainless springs cover 5–22 psi base pressure, and the integrated turnbuckle lets you fine-tune preload in minutes—often without swapping springs—so you can dial in stable, repeatable boost with factory or electronic control.

Features

• Direct bolt-on for 2003–2005 Mitsubishi Lancer Evolution (Evo 8) with internal wastegate
• Silicone/Nomex diaphragm with high effective area in a compact housing
• 18 mm stroke for greater control authority and boost headroom
• PEEK spherical pivoting rod guide for low friction and durability
• Three stainless springs included (5–22 psi) with turnbuckle preload adjustment
• Improved spool, more stable boost, and reduced high‑rpm boost taper

Perfect for Evo 8 owners seeking consistent, tunable boost, this GFB WGA delivers precise control in a tidy package. Have questions or need fitment advice? Call our Austin, TX shop at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer professional installation and customization at our Austin, Texas and Los Angeles, California locations.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

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