Chinese 6 Pin High Performance CDI Version 38 Chinese 6 pin high performance, no-rev limit CDI, AC (alternating current) power fits many 4-stroke models of scooters, and mopeds. Many size engines require this style CDI, so go a step higher with a high performance part! High performance CDI has no rev limiter. Verify the number of pins and style of plug for best match of your CDI. CDI description: AC 6-pin 2-plug rounded (plug as pictured) High performance 74mm long (2.9 in) 41mm wide (1.6 in) 23mm thick (.90 in) Fits many GY6 scooters and with 50cc, 125cc and 150cc engines in 152QMI, 152QMJ, 157QMI, 157QMJ, 139QMB 4strokes. Shipping details: Do you need your CDI fast? If you order before 3:00 pm CST, Monday thru Friday, your order goes out the same day. Buy now! Electrical parts are not returnable. Please double check before ordering.