VR6 lumps are well worth mapping, you need to remember its not all about the peak power numbers it about the whole power curve with an NA engime. Just by having another 4bhp over the whole rpm range will transform the performance, plus just by having an extra 300rpm on the limiter with make the car feel more alive.. Before the 1.8T 20Vs came along the chipping marketwas all about the VR6.
I have many VR6 customers who feel the software remap was well worth the money.