Im planning on using the teraflex fiberflex kit. If you have never used a mono leaf before dont be so fast to dissmis it. Skyjacker and teraflex have spent alot of time on these lifts and I know teraflex is lifetime against sag. Is your spring pack? Any way im just saying that for a company to put these products out they do alot of testing, just because they are new and there are few writeups on them does not mean there are not quality.