The Sirio S30RS is the perfect upgrade to any "Big Block" powered monster truck. The 3 port, ABC piston and sleeve produce tons of stump pulling bottom end to get any heavy weight truck up and going.

The S30RS features ABC construction on the piston and sleeve. An SG shaft which is standard on Big Block trucks. All aluminum single adjust carburetor (lowend and high speed) and an included roto-start back plate.

Get your Big Block monster truck flying by replacing the standard engine with this 4.9cc monster!

 

Displacement:	4.9 cc
Stroke:	18.5mm
Bore:	18.3mm
Ports:	3
Piston:	CNC
Sleeve:	ABC
Exhaust:	Rear
Weight:	397 grams
Crankshaft:	14.20mm SG Type
Carburetor:	Aluminum / Slide / Single Adj.
Plug Type:	Standard