O.S. Speed 21XZ-GT OS L-OS1AS00 ompetition engine that has developed for 1/8 scale GT touring car racers. Thanks to a 7mm carburettor restrictor it meets the USA ROAR racing class regulations.
The performance has been tailored to excel in medium and high speed ranges by adopting a 5 port scavenging layout and a 3 exhaust ports. The crankshaft is optimised to give an emphasis on power delivery then exiting corners as demanded in GT car racing. As you would expect from an OS.SPEED engine the 21XZ-GT utilises DLC coating & tungsten balance weights for the best performance available. The carburettor also includes reducers to comply with ROAR regulations.
• New scavenging 5 port + 3 exhaust port layout that matches the ROAR regulations.
• Adjustable carburettor with 7mm reducer to meet ROAR regulation.
• Low center of gravity, thanks to a modified lightweight head design
Note: The product in the pictures is a prototype and may be changed without notice.
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