Forge Motorsport Adjustable Diaphragm Actuator for Subaru TD04/TD05 Turbochargers

Forge Motorsport pioneered the billet aluminum turbo actuator, setting the standard for performance with our original designs for:

• Cosworth performance engines

• Renault 5 GT Turbo

• Lancia Delta Integrale

Performance Advantages

• Precise boost pressure adjustment capability

• Improved turbo response and control

• Standard spring optimized for factory/slightly elevated boost levels

• Optional high-performance springs available for tuned applications

Technical Specifications

• CNC-machined from 6026 aircraft-grade aluminum

• UK manufactured with hand-finished polishing

• Dual sealing technology options:
  • Standard Nomex-reinforced diaphragm
  • Piston-sealed option for extreme durability

• Laser-cut stainless steel mounting hardware

Package Includes

• 1 × FMAC4SUB Turbo Actuator

• 1 × Forge Motorsport decal

• Lifetime warranty coverage

Important Notes

• Base unit includes factory-equivalent spring pressure

• Higher boost requires appropriate engine management

• Professional installation recommended

• Product appearance may vary due to continuous improvements

Application Support
Contact our technical team for:

• Spring rate selection

• Installation guidance

• Boost tuning recommendations

British-engineered performance components for Subaru enthusiasts worldwide.

(Note: This version maintains all critical technical information while improving readability. Key features are bulleted for clarity, and the dual sealing options are prominently displayed. The warranty and manufacturing details remain clearly stated while being more visually accessible.)