Reviews for O.S. Speed 21XZ-B Spec II "Tuned" Off-Road Competition Buggy Engine [OSM12175]

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Charles Mims
Wednesday, Jun 4 2014 (11 months ago)
O.S. Speed 21XZ-B Spec II "Tuned" Off-Road Competition Buggy Engine
This ENGINE IS awesome, what a power plant. I have 3 gallons through this engine. It is unbelievable . I have the 2060 pipe combo and this mill Will idle all day!!!! SMOOTH POWER Throughout the power band. Once again thanks OS for a reliable engine you can count on @race day.
Kah Chik Yong
Wednesday, May 15 2013 (about 2 years ago)
O.S. Speed 21XZ-B Spec II "Tuned" Off-Road Competition Buggy Engine
Awesome engine.. Use it with os pipe 2090. good range of power. easy to tune
Ricardo Mariani
Sunday, Jun 2 2013 (about a year ago)
O.S. Speed 21XZ-B Spec II "Tuned" Off-Road Competition Buggy Engine
Fantastic engine when equiped with 2060 pipe. A little smoother than the previous version but still very strong and reliable. For me it´s #1.