Originally posted by Seraph
Well if you have a few hours, just take it off and find out, I'd imagine that the results are similiar between the wrx and the STi. I did it to my wrx, no need to do it to the STi just yet
The engine/exhaust is a little more pronounced, and you can hear the recirculating valve go. I believe when i did it the turbo spooled up 200-400 rpms or so quicker.
Any actual power gain was not discernable by buttdyno.
Few hours??? It took me less than 15 minutes and I'm not mechanically inclined at all. I think it's worth it so you can hear the turbo and stock bov a lot better. I don't see any major downsides, unless you submerge the car in deep water.
If you check out scoobymods.com, they tell you exactly what to do and what tools to use. It's worth a try since it's so quick and easy to do. If you don't like it put it back on.