if your not going to have a PC3 with a map on it, go stock. my bike before had the K&N and gutted cat, Ivan said i was a little lean. With a PC3 and his tune i was golden and boy that tune made a big diff up top, i could tell immediatly. So, if you plan to keep it stock, stay stock, if your gonna do a PC3 and maybe a slipon, go K&N, i did the K&N just simiply so i only paid $40 one time and was done with buying airfilters.
"Lead, Follow, or get the hell outta my way!!"
Blue 2004 ZX-10R
- 152.5rwhp 77.6rwtq - more than I need
Red 2003 Jack ROUSH Classic #8 of 50
- 375rwhp 381rwtq