speak to your tuner as you re getting contradictive answers, if you supply a package that does not get what ever results you want, then you are responsible. for 300 F6 injectors are better than siemens 60 lb injectors the 60lb injectors are going to require rail spacers to fit the 60 lb injectors will not give as a nice idle as f6 or ID1000 injectors, not matter who tunes it many will tell you that their 60's idle fine, many have no idea about what is actually going on and it's normally fussy owners that pick up on it the f6 cooler is not great at that power level and forget about what people are saying about it being consistent from one dyno run to another, or for racing. Every time the car makes boost it is generating heat, so a blast through a couple of gears is like doing several dyno runs and fact is even with 1 dyno run if the heat is getting higher then the ecu will be pulling spark, so fact s just 1 dyno run will normally get higher rwkw numbers with a decent cooler and also be able to back it up. the car is not going to hold higher boost in the top end and fall off due to being the small turbo