E85 Tune with Kooks Long tube headers advice

[Pdaddy1280]

Thinking about adding Kooks long tube headers and getting an E85 tune for my GT PP 6-speed manual and looking for advice. I know E85 is relatively hard to come by so am considering a flex-fuel kit. I’m wondering if the limited HP increase is worth the investment or if I should save up to get a supercharger later. Would a tune with headers on 93 octane give me any discernible increase at all?

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[Junkyard Dog]

Thinking about adding Kooks long tube headers and getting an E85 tune for my GT PP 6-speed manual and looking for advice. I know E85 is relatively hard to come by so am considering a flex-fuel kit. I’m wondering if the limited HP increase is worth the investment or if I should save up to get a supercharger later. Would a tune with headers on 93 octane give me any discernible increase at all?

Yes, but E85 is going to be significantly more. You can always have two tunes. If you just cannot find E85, and you are about to run out, fill it with 93 and flash the 93 tune.

It might be a little annoying, but there is no real flex fuel for the Mustang. There are tunes that adjust for ethanol content, but they are slow to adjust and you give up a lot that a real E85 tune would give you.