We recommend you replace your intake filter at least every 12 months or 10,000 miles. This will vary depending on type of use and other environmental factors.
 
Please note that there are two options for a replacement filter. 

(OFI-100145) TY-SUP01/TY-SUP01L - For the V1 & V2 Intakes
 
(OFI-152115) TY-SUP05 - For the V3 Intake