OSMG2057 OS 21VG (P) ABL Series .21 Offroad Engine. You have to be ready for all types of tracks when you race...and with a 21VG (P) engine, you are. 21VGs are designed to deliver speed at need or power on demand — and that makes them ideal choices for buggies, truggies and trucks alike.
 Drop in a 21 VG and you have a power plant that can meet — and beat — the competition now and famous O.S. durability to make sure you'll keep doing it for a long time to come.

 - A great choice for new vehicles and a low/no-mod retrofit for many RTR big-block engines
 - 1/4 -28 1-piece pilot (SG) crankshaft perfect for Centax-type clutches
 - 8-fin, machined aluminum “Tornado” cylinder heat for high-capacity cooling
 - ABL (Advanced Bi-Metallic Liner) for tighter seals, less wear and longer life
 - Machined aluminum piston
 - 3-port cylinder liner
 - Double-bushed, knife-edged conrod
 - Dual-needle, 21F slide-valve carb for easy adjustment and smooth, linear acceleration
 - Rear exhaust design

Displacement: 0.211 cu in (3.46 cc)
Bore: 0.654 in (16.6 mm)
Stroke: 0.630 in (16.0 mm)
Practical rpm: 3000-36000
Output: 1.97 hp @ 30,000 rpm
Weight: 12.2 oz (347 g)
Includes: #8 glow plug & exhaust seal ring
Requires: Manifold and muffler or tuned pipe, fuel with 10-30% nitro and at least 16% oil content