hi all,spotted this on http://www.ebay.co.uk/itm/VR6-OBD2-HEAD-GAS-FLOWED-RACE-PREP-VALVES-/170773066070?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item27c2de3156#ht_1249wt_1054 ebay what do u guys think of it and is it worth it, after remap i made 212 bhp and 199lbs torque what extra would i get from this head