Can anybody tell me how much changing the cdi box on a TRX 450r makes a difference? Is it alot better?

 

yes big difference... being able to run the gears out farther then stock will let you is a big difference!!! also in cornering and faster accelleration. hotter spart. very nice ! but i wouldn't spend any more then 150 for this part. but if you got the money do it!