First mod will be JB4 stage 2 and charge pipe. Advertised gains w/ dyno's to back it up +60hp +80tq on a stock 135i. Stock dyno's w/ the JB4 are consistently 280hp/280tq (bmw underrated the HP numbers). The JB4 has maps for most bolt on's which makes 400whp and 450tq well within grasp. I already have the two on their way and will install during the 5 day return period from carmax. I paid 500$ for the two, not a bad deal dollar for hp.
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