This tiny little bugger can be quite a pain to install, and make sure you have a rag underneath it to catch some of the risidual fuel in the fuel rail when you pop the old one off. A very important part if your tune is high enough to utilize it. not sure what the differenc it made in and of itself, but when it went in along with my stg 4 SW I was very happy.

Rating: [5 of 5 Stars!]