Subaru advises 93 octane, as well.
As far as the MAF is concerned, a lot of intake modification information involving MAFs and custom work, although conducted on more modern MAF NA Subarus, can be found <
here>. You really want to duck removing any Helmholtz hardware if you can, all told.
Odd, because he agrees with the results of removing the anti-resonance hardware, but that should make it run rich, yeh?
