Subaru WRX Forum banner
blow of valve
1-2 of 2 Results
  1. Tuning: Electronic Engine Management
    Hello everyone! I'm new to this forum and i was hoping i could get some advice and maybe i could learn a thing or two while im here. To start with i have a; 2007 wrx wagon 2.5L dohc H4 current engine mods are; Stage 1 cobb OTS tune STI lower block GFB blow off valve catless downpipe and...
  2. Engine Modifications
    Any pros and cons?
1-2 of 2 Results
Top