Welcome to the Z club and nice color choice might I add! I didn't notice any increased gas mileage after my break in period. However, this is probably because during my break in period, I drove like a granny, then after I was quick to test the car's power.
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CY 370z |Sports Package| Berk CBE| Berk High Flow Cats (awaiting install)|BBS LM|Eibach Pro-Kit Springs|Stillen Sway Bars|TWS Shift Knob|B&M Short Shifter
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