FILTER MEASURING GUIDE
- DO NOT ROUND UP OR DOWN -- GIVE US YOUR MOST ACCURATE MEASUREMENT
- MEASURE FILTER THE SAME FOR PRE-FILTER WITH OR WITHOUT TOP
WHENEVER POSSIBLE PLEASE SEND A PICTURE TO SHOW FILTER PLACEMENT IN AIRBOX
STYLE EXAMPLES:
HOW TO MEASURE
MEASURE CIRCUMFERENCE (DISTANCE AROUND) WITH CLOTH TAPE, OR STRING
round
oval
