I felt the biggest performance jump of any jumps I've done when I went to stage 1+. This includes stage 1+ --> stage 2+ --> PTF 93 tune --> PTF e50 tune.
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2009 e90 335i | AT | AG M590 | Conti DW | KW V1 | Lux | Akebono
e50 PTF Protune | Cobb FMIC | aFe DCI | VRSF DPs | ER CP | Tial BOV | Alpina Flash | Fuel-It Stg1 | RB PCV | Cobb Exhaust
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