FYI: the difference is GREATER between the stock 87 tune and the custom 87 tune than it is between the custom 87 tune and custom 93 tune. And my custom 89 and 93 tune's each have their own different characteristics; the 89 pulls harder in the mid RPM range whereas the 93 pulls harder up top.
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Rick 07 GT Prem: Alloy, MT, 3.55's, Steeda CAI w/Brenspeed tunes, FRPP Stingers, 275/40/18 Goodyear Eagle F1 A/S on SVT Cobras (OE GT500's), 14" shorty, Wheelskin side scoops & qtr window louvers, A-H rear window louvers, SHR honeycomb blackout panel, Sequentials, Hella Optilux Extreme XY fogs, Silverstars 06 V6: Legend Lime, Pony Package, 14" shorty, Sequentials, Hella Optilux Extreme XY fogs, Silverstars
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