Originally Posted by homemade wrx

unless they have the recirculating fitting coming off of the end and returning to the inlet pipe, it isn't recirculating...it will make the car run rich...that and 13psi is about 5 less than factory...Might explain why it feels as slow as an ITR...?
You can probably pick up a less screwed with 05 for about the same...the 05's are better anyhow too.