"O.S. SPEED 21XZ-B Spec. II has come back as 110% limited edition planned by Ty Tessmann!!"
In commemoration of his 1st price in ROAR NATS TRUGGY 2017, OS Engine is proud to announce OS SPEED 21XZ-B TY 110% edition with 7.0mm carb restrictor to get overall power and 90mm manifold, the longest manifold OS has ever made upon his request for consistent idling + low fuel consumption, and furthermore, 4mm lower cooling head compare to the original Spec. II for stability.
The 110% edition comes with 90mm manifold + T-2090SC (combo set, code #1217E).