Don't take this the wrong way! I know you get what you pay for but, unless you race or just have a big ego that engine is not for most! I know that a C5 or WS7 will smoke my truck running a cheap ***** .21 but it does the trick for me probably because there is not anyone else out here that runs MT's so, I don't have the keep up with the Jones complex!LOL Now if I raced I would want the best thing I could drop in there and cost would not be an issue but, when your like me and just bash around the local BMX track or the street or backyard I don't think I would get my money Worth out of a C5! JMHO