mines running 1 bar at 167bhp on these mods and it has been for a year now and had no probelms with the engine. and thats with the standard mani and the standard tmic -blitz nur r spec exhaust system -blitz dump valve -japspeed decat -blitz sus induction with reclocation kit -hks fuel cut defender -hks actuator -silcone rad hoses -A/C removed -Cusco oil catch tank -sliver fse competion rrfr -walbro fuel pump