little gain!? you must not have tuned it correctly... my dyno graph before and after produced a 20rwkw gain, alot of people with SAFC's have said they have achieved similar gains. I think its a good mod if you dont plan on doing extensive work. If you do the basic things like me; pod, exhaust, cooler, fuel pump, boost... then its perfect, i was able to get 192rwkw with the SAFC and 170 or so before it was installed.