S3 EXTREME Insert for Cylinder Head – 250cc or 300cc, 2017-2020 *SPECIAL ORDER

Description

LOW COMPRESSION EXTREME INSERT (works with or S3 cylinder head)
Developed for the Enduro Extreme piloting, where the power control is a must.
– More traction
– Soft Bottom
– Very easy to ride
– Made for extreme enduro riders
Don’t forget to grab an O-ring kit