In this forum there's a battle between SF kits and C2power kits. Use the search function to see what others are saying between these kits. Last time I check, they say SF is good but delivery is a prob because it takes few months after your kit to be shipped out most of the people who ordered the kit are still in the waiting list. C2power was nothing but promising results, but the kit came from Europe and you have to deal with international transaction and shipping. It's your money, It's your call..you decide. For a mod that will cost you 3000-5000 (parts and labor), I say research first..