Turbosmart TS-0645-1052 IWG75 5PSI Wastegate Actuator for VW Golf R K04 2.0T

Vehicle Fitment

• K04 Turbocharger (2.0T) as used on VW Golf R, Audi S3/TTS and other VAG 2.0T platforms with K04 turbo

Features

• High-performance Turbosmart IWG75 internal wastegate actuator design
• Pre-set 5 PSI (0.35 bar) base spring matched to factory boost levels
• Increased effective diaphragm area for improved "working ratio" over stock
• Billet aluminum construction with black anodized finish for durability
• Proprietary silicone-Nomex diaphragm for heat resistance
• Stainless steel rod and clevis for strength and corrosion resistance
• Turbosmart locking collar system allows quick spring swaps
• Bolt-on upgrade for K04 turbochargers without modification

Specifications

• Brand: Turbosmart
• Part Number: TS-0645-1052
• Type: IWG75 Internal Wastegate Actuator
• Base Spring Pressure: 5 PSI (0.35 bar)
• Material: Billet aluminum body, silicone-Nomex diaphragm
• Finish: Black anodized
• Orientation: Internal wastegate application
• Fitment: Fits K04 turbochargers on VW/Audi 2.0T engines (e.g., Golf R, Audi S3, TTS)

Included Components

• 1x Turbosmart IWG75 internal wastegate actuator (5 PSI pre-set)
• Required mounting hardware and fasteners
• 1x Swivel hose barb
• 1x Installation/instruction sheet

Product Description

The Turbosmart TS-0645-1052 IWG75 5 PSI internal wastegate actuator is an upgraded performance replacement for the factory wastegate actuator on K04 turbocharged Volkswagen and Audi 2.0T engines, including the VW Golf R and Audi S3/TTS platforms. Designed to improve turbo boost response, this actuator increases the effective diaphragm area and enhances the working ratio compared with the stock unit, helping your turbo achieve and hold boost more consistently throughout the engine's power band.

Built with a billet aluminum body and finished in black anodized coating for corrosion resistance and long service life, the TS-0645-1052 also features a heat-resistant silicone-Nomex diaphragm and stainless steel rod assembly for durability. The Turbosmart locking collar system makes changing springs easy if your tuning goals evolve, and the direct bolt-on fitment to K04 turbochargers requires no fabrication. Ideal for enthusiasts seeking smoother boost delivery and improved throttle response on factory and moderately modified engines.