Turbosmart TS-0203-1223 34 mm Kompact Plumb-Back BOV for Evo 4-10/3000GT/Stealth

Vehicle Fitment

• 1996-2015 Mitsubishi Lancer Evolution IV-X (4-10)
• 1991-1999 Mitsubishi 3000GT VR-4 (All-wheel drive)
• 1991-1996 Mitsubishi Stealth R/T AWD
• 2008+ Mitsubishi Lancer Ralliart (4B11 Turbo)
• Universal fit: any vehicle with 34 mm Bosch/Denso bypass valve flange

Fitment Notes

• Full recirculating (plumb-back) BOV--no atmospheric venting sound
• Includes green spring rated at -15 inHg for OEM-style response
• Universal flange suits Bosch or Denso bypass valve setups

Features

• CNC billet aluminum housing--compact and durable
• Fully recirculating design retains metered mass airflow accuracy
• Matched spring kit for optimal vacuum/boost sealing
• No-drill direct replacement for factory diverter valve
• Internal piston ensures quiet operation and fast response
• No piston-sealing O-rings--oil-free for low maintenance
• Installation clamps included--fits 34 mm OE flange directly
• 1-year manufacturer warranty on materials and workmanship

Specifications

• Part Number: TS-0203-1223
• Bore Size: 34 mm; Housing: Billet aluminum
• Spring: Green, -15 inHg; Fits Bosch/Denso flange
• Function: Plumb-back recirculation loop only
• Warranty: 1 year limited

Included Components

• 1x Kompact 34 mm plumb-back BOV
• 1x Green -15 inHg spring pre-installed
• 2x Hose clamps
• 1x Turbosmart gasket
• 1x Installation instruction sheet

Product Description

The Turbosmart TS-0203-1223 Kompact Plumb-Back BOV is a direct OEM-style replacement designed for turbocharged vehicles equipped with a 34 mm Bosch or Denso bypass valve flange--stock applications like Mitsubishi Evo IV-X, 3000GT VR-4, Stealth R/T, and Ralliart, as well as universal setups. The recirculating design eliminates atmospheric noise while preserving factory MAF and boost performance.

Constructed from CNC billet aluminum, the compact Kompact housing delivers rapid piston response and quiet operation. The green -15 inHg spring ensures firm sealing and fast opening at standard boost thresholds. Clamp-on installation requires no modification and includes all necessary hardware. Ideal for enthusiasts seeking stealth performance with OEM functionality.