That is true. You will shift sooner, but in top gear you will run higher RPM's dropping milage. You may save gas around town but lose milage at a consistant speed.
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99 Mustang 3.8L, C&L mass-air system, GT dual exhust and rear bumper, Maximum Motorsports 4-point K frame brace, full length sub frame connectors and strut tower brace.
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