I have seen a lot of people that puts the RX-7 AFM in the pros, Is this mod increase something? If does, what improbe? and of what year AFM I have to put on my pro 91 LX?

 

First of all, what does improbe mean?

The stock AFM is quite a restriction. It has a small square opening. The RX7 unit has a larger, more rectangular opening. The main advantage with the RX7 one, is less of an intake restriction. Other people have only made gains above 6000RPM, but I made some gains throughout the entire rev range. It's best when tuned on a dyno. Here's my before and after dyno of the RX7 AFM.

 

Sorry for the spelling!


What is an srew that has in the OEM AFM that when your looking at the front youll see a oval screw at the left of the AFM?

 

you'll want to use the 86-88 AFM off a rx7