RB Products Circuit 11 .21 9 Port Competition 1/8 On-Road Engine (Turbo Plug)

RB Products
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
Low Price: $489.99
Discontinued Online

This is the RB Concept Circuit 11 .21 9-Port Competition 1/8 On-Road Engine. This engine was developed with all the tricks, tweaks, and RB know-how for the most demanding RC class, 1/8 on road. This engine is the pinnacle of RB performance!

The C11 is now offered with a black crankcase that has been strengthened to help prevent distortion and vibration, while increasing heat dissipation in order to provide a more reliable and powerful engine. The crankcase has also been modified for improved internal flow, providing increased power and efficiency. The enhanced 9-Port sleeve design features the exclusive RB "Multi Exhaust System" (MES), providing linear power while ensuring improved reliability and increased lifespan, while the O-Ring supported turbo combustion chamber helps to prevent vibration and dirt contamination. The 14.5mm long stroke crankshaft has been double balanced with tungsten slugs and has been silicone ramped for lightweight vibration free performance. This crankshaft rotates in a 14.5mm ceramic rear bearing and "Z Special" front engine bearing, further reducing vibration and increasing engine performance. When combined with the CNC Machined Lightweight Domed Piston the C10 produces incredible RPM's, and the "smart groove" allows easy removal of the wrist pin clips. This engine offers all of these features and more, adding up to an engine that truly has been designed for racing at the highest level!


  • 9 Port Sleeve w/Multi Exhaust System (MES)
  • CNC Machined Lightweight Domed Piston rounded with special shape and "Smart Groove" to easily remove the wrist-pin clips
  • Strengthened black coated crankcase with improved heat dissipation
  • Modified crankcase for a better internal flow
  • O-Ring supported turbo combustion chamber to prevent vibration and dirt contamination
  • 14.5mm double balanced, silicone ramped, long stroke crankshaft
  • 14.5mm Ceramic rear bearing
  • Aluminum 9mm carburetor with included 8.5mm aluminum venturi and redesigned 9mm venturi
  • Aluminum orange anodized carburetor pinch bolt
  • On-road L2G cooling head
  • Dust protection caps

Recommended Tuned Pipe:
2006 In-Line Polished Tuned Pipe
01351-05P: In-Line Medium Conical Polished Manifold 

Displacement: 3.49 cc
Bore: 16.22mm
Stroke: 16.80mm
Porting intake: 9
Porting exhaust: 3
Crankshaft: 14.5mm
Carburetor: 01256-9 Aluminum 9mm
Glowplug: TURBO 01051-7
Weight: 330g
Use: 1/8 On Road Circuit

This product was added to our catalog on March 3, 2011.

Low Siew Choon
Verified Owner
Saturday, Aug 25 2012 (about 5 years ago)
RB Products Circuit 11 .21 9 Port Competition 1/8 On-Road Engine (Turbo Plug)
Stated the RB C11come with 14.5 main bearing is ceramic bearing but open up it is not as what the website stated , so who's fault???)