New here. Just rebuilt raptor 660 with wiseco 9:1 and rebuilt head with kibblewhite kit. Everything else is stock. I now want a new exhaust and filter. I was looking at ct exhaust and going with the K&N pro design. I'm not sure what to go about rejetting. I ride around 7,000'-8,000' ive seen people go with dynojet stage 2 but have problems with high altitude. I'm new to rejetting so any guide on what to do would be great. THANKS!