Quote:
Originally Posted by 904FRSlow
I usually do 80 on the highway. What rpm range are you at there and around what mpg? I'm still on the fence about this because my commute will be mostly highway soon. Also, I have an AT as well with lots of NA bolt ons.
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Don't remember exactly but around 3000 rpm at 78 to 80 mph. Gas millage drops a bit. I see 28 to 30 at 77 mph, 30 to 32 at 70 mph.
A bit of loss of economy is well worth the performance gained with the 4.88s.