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Need your educated guesses on my performance increase...
OK folks!
I have ordered my TPIS FastPak and my PowerEffects exhaust for my '91 C4. I am tempted to drop the $75 on the dyno before to see what I get after, but not sure I want to spend the $150 for both ends to be disappointed on the performance increase.
Anyone have any guesses on what I will really see?
Im with the rest of them, probably 20-25 and mostly from the PEs. How about taking it to the track before and after, you can sorta kinda measure gains that way too and have some fun.