So if you've got an STI running an fmic and you are going to go huge turbo, you need a big MAF and I need a stock diameter intake. The Perrin big MAF has <1k miles. As mentioned in the title, straight trade so you get a good deal.

Why? Well I've found out the WRX ECU intake tables max out at the same airflow as a stock diameter MAF so there's absolutely no point in running a big MAF - it'll just mess up the car so I can't drive well after putting it in.

Thanks,
Ambert
(925)-548-4331