Originally Posted by Matt Monson
The other thing is that a stock WRX uppipe doesn't clear them properly, so you are left to manipulate things quite a bit or do something other than use a turbo crossmember and factory style uppipe and downpipe pieces. But again, for a creative and resourceful person, it's not a bit deal.
I just cut off the heat shield and used the heat wrap on the stock WRX UP with my SOHC heads. It cleared fine after that.