In January my old Beta blew up and I picked up a new-old-stock 19 CRF450R. On the Beta I was running the C3 Motorsports intake with just a prefilter. The dealership I got the Honda at (which also sells Timbersled completes) said they throw a thermo on there but they don't make any changes to the stock airbox other than throwing a prefilter over the stock filter. That's what I did and I rode it out for the rest of the season that way, didn't notice any issues. I'm curious if anyone else with a CRF has made changes, or if that's working for them as well. Wanna make sure I'm not screwing myself longer term.