by jaybags on Tue, 17 Dec 2013 8:07 +0000
Do a search mate, Steinbauer's proven, and there's 100's here that'll tell you that. Tune-it may give you slightly more power, but I gaurantee you won't get the reliability of the Steinbauer. There's a thread on here "Steinbauer facts and figures". Check it out.
Alternatively, look at the HKS unit or Unichip, they do more than just a chip, though you'll need to have your car tuned on a dyno for those.