LRD's f'n kick ass. Ive had numerous sets of pipes, from T-5's, T-6's, CPI's and now LRD's. Im running a 4mill stock cylinder bike. I tried 5 sets of pipes in one day (shearer, CPI, T-5's, LRD's, T-6's, and even some out of frame drag pipes. With the CPI's and Shearers I lost a lot of bottom end. With the toomey's, they "flattened" out and ran outta power in the higher rpm. With the LRD's, I had all the mid and low end power of the t-5's but a ton more top end like a CPI. I had two sets of LRD's and I recently just sold a set. The ones on my bike now are LRD's and It will be hard for me to go to another pipe. Im curious as to what a CPI or even a trinity pipe would do on my build. If you have further questions, PM me and Ill give ya my cellphone # and you can ask all the questions you want. I'd love to talk more about em and and answer ur questions. They are awesome pipes and kinda hard to find actually. I'd sell mine, but im def not gonna give em away since they are in such good shape.