Quote:
Originally Posted by daemon1957
You are right about the tune not being needed. It would give you a bit more if you did plus other maps for valet and low octane or anti-theft. If you had replaced your cats, it would be best to get the tune. You just have to weigh the cost to power gains.
Cheapest gains IMO are drop-ins w/ MAF tubes and lightweigh underdrive pulleys.
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UD pullies sometimes do not (always?) have the best damping system, and this can cause a voided power-train warranty, if nothing else.