15s engine w/rotary carb and side exhaust power your rc10gt and other vintage nitro platforms with this exclusive team associated small block nitro engine supplied by team associated with a full line of parts support. This small block engine features a side exhaust, rotary carb and standard threaded crankshaft (non sg shaft). Features high quality abc piston / sleeve material standard threaded crankshaft (non sg shaft) high compression tapered piston / sleeve rotary carb for vintage platforms side exhaust machined blue engine head high quality bearings installed tunable 3 needle carb (top end, bottom end, idle) stroke volume: 2. 49cc piston diameter: 15. 00mm piston stroke: 14. 00mm speed: 28000rpm horsepower: 0. 85hp weight: 203g (ass29029)