hi guys im new to this forum and i have a 12 v engine i heard the best performance for the 12v v6 is the s3 velocity maf where can i buy it ? and how many horsepower gain do i get please tell me all about it i relli wanna buy it and install it ...

greatly apriciated

That's Mance. He used to make and sell those. I don't know if he's got any left. You'll definitely want the velocity stack (sold separately from the Stage 3 MAF.) Without the VS, you're going to get a CEL since the air flow past the sensor isn't smooth.

As for horsepower... hard to say. It's noticeable... so I'm guessing at least 5 horsepower. Between a bored throttle body and the Stage 3 MAF, you're going to notice a noticeable increase in power.

Bob

made a few tenths of a sec faster accel from 20-60mph... def a noticable improvement in the higher RPMs... but no HP numbers for me.