1. Fit for Subaru engines. 2. Compresses valve springs with the head on the bench or on the engine in the car. 3. Allows easy replacement of valve stem seals, valves, springs, and retainers. 4. Will not slip or damage head like universal clamp compressors. 5. Roller ball thrust bearing provides smooth operation even with uprated performance valve springs. 6. Aplication: For 02+ Subaru Impreza WRX and WRX STI with 2.0L or 2.5L DOHC Turbo engines (EJ205, EJ207, EJ255, EJ257) For 04-11 Subaru Forester XT with DOHC Turbo engines For 05-10 Subaru Legacy GT with DOHC Turbo engines For 05-10 Subaru Outback XT with DOHC Turbo engines For 05-06 Saab 9-2X Aero with DOHC Turbo engines For 04-06 Subaru Baja with DOHC Turbo engines For 96-98 2.5L DOHC Phase 1 N/A Subaru engines
