The maf im talking about came from a single turbo'd NA that was running fine and i took the car apart for bits. The MAF Was attached to the turbo by some stupid makeshift coupling of 3 different sizes of silicone couplers, never seen anything like it, it was ridiculous. Anyhow thats how i know the maf works - its just got the square part that would normally bolt to the filter snapped offl.