Hey all,

Just wondering what the difference was between stock wrx my98 AFM and v3-4 sti AFM were?

Are there any benefits with having the v3-4 sti AFM over having the stock standard WRX AFM?

Thanks ahead for your input.

Completely different. WRX one is 80mm, STI is 90mm. They run at different voltages I believe as well.

The sti one has a pretty orange sticker.

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Straya

i just put one in my 98 wrx, reset the ecu and it runs like shit, any help would be awesome, cheers

probably a bad AFM.

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Long live the WRC

If the sticker is different, then the part number is different, not a straight bolt up job.
If the diameter of the tube is different also, it will affect the MAF scaling, eg, the voltage/airflow relationship.

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Its just the internet dude, its not real.
F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i