I was on SLP's site and to do the stage 4 kit it will cost around $2,500 after all said and done. I was curious about just doing a head and slp pipe set with programer. Im curious how much clutching will need to be done after than or if I could just add two grams of wieght and be good to go. Or would i need to change out springs and what not? also on the stage 4 kit that envolves porting. curious how much the porting would benifit? Doing just heads, programer and pipe set would cost around $1,500 would it be worth the extra $1000 for porting and springs?