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

Displaying reviews 1 to 5 of 5
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Charles Mims
Wednesday, Jun 4 2014 (about a year 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 2 years 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.
tj saunders
Wednesday, Jul 1 2015 (3 weeks ago)
O.S. Speed 21XZ-B Spec II "Tuned" Off-Road Competition Buggy Engine
OS Engines lives up to their rep with this engine, I run it in my truggy with the 2090 pipe and have had the best performing engine ever, highly recommended.
Alonso Diez Canseco
Wednesday, Jun 17 2015 (5 weeks ago)
O.S. Speed 21XZ-B Spec II "Tuned" Off-Road Competition Buggy Engine
How many ports does this engine has?.Can sombody tell me?.