Up to 90 is good according to GPS on my phone. But my GF is following me and my cruise is set at 74 and she says she is doing 70 and GPS says I'm doing 73. So I'd say at legal speed limits and normal driving your alright.
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2008 Infiniti G37s 6mt coupe
Berk HFC, Magnaflow Catback, JWT Popchargers, H&R, Eibach, Stillen Sways, B&M short throw, 4.08 frontier gears, NST pulleys
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