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I have the 4.0 bar FPR, it pulls a bit harder in the mid range, I didn't notice any different towards the redline.
2001 S with 76mm Throttle body, ebay headers, UDP and modified stock muffler.
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RoW M030 shocks and sway bars, H&R springs, UD-Pulley, chinesium headers, 76mm TB, 4.0 bar FPR
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