stock merc. 502efi manifolds mods.?
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stock merc. 502efi manifolds mods.?
what if any performance gains would you get by modifying the stock merc. manifold on a 502 efi? az speed and marine sells a "short runner " manifold which is a stock manifold with machining work done to it ? i already have the az speed and marine "super tune kit" (ecu re-prog. , adj fuel reg, k+n filter, msd ignit.) plan to add rev. marine exhaust and was wondering if this modified manifold would benefit. also was told the ecu would have to be re-programmed slightly by az speed and marine to compliment the change.
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