The IWG75 7 PSI internal wastegate actuator replaces the stock unit on 2015‑2021 Subaru WRX models. It features a silicone diaphragm reinforced with Nomex for high‑temperature durability. Constructed from billet aluminum with stainless‑steel rods and a locking collar for quick spring changes. The actuator provides precise boost control, delivering a flatter boost curve and reduced turbo lag. Designed for high‑boost applications, it is compatible with any Turbosmart boost controller.

                  
                                          
                        
Actuator Type
                        
Internal Wastegate
                      
                                          
                        
Boost Pressure
                        
7 PSI
                      
                                          
                        
Diaphragm Material
                        
Silicone with Nomex reinforcement
                      
                                          
                        
Construction Material
                        
Billet aluminum with stainless steel hardware
                      
                                          
                        
Weight
                        
3.0 lb
                      
                                          
                        
Dimensions (L×W×H)
                        
6 × 4 × 4 in
                      
                                          
                        
Compatibility
                        
Subaru WRX 2015‑2021
                      
                                          
                        
Spring Adjustability
                        
Interchangeable springs for various boost levels
                      
                                          
                        
Mounting Style
                        
Locking collar design for quick spring changes