Hey guys. I think I have a boost leak since my engine sounds slightly different. The car doesn't feel as if it pulls as hard as it used to. And I've noticed a drop in MPG. I've been reading that you can make your own cap to run the boost leak test. Just wondering if anyone has done this on their 09 or 08 wrx with stock intercooler. Where do you place the cap? right behind the air filter? or right behind the turbo?