It is seriously an amazing gauge. The readings are accurate, even if you dont use the anti-buzz fitting that they give you. Also, it fits in the New South Performance steering column pod perfectly. $47 is a sweet deal for such a great gauge. Check out a quick vid that I posted up:
http://www.youtube.com/watch?v=xS9b77bS3PY
Ordered from: http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=TP&Product_Code=ATP-ACS-019&Category_Code=