This Combo includes:1x VSB051x Tuned pipe VS Racing EFRA 21351x Manifold L50 The new and exclusive VS Racing VSB05 long stroke .21 off-road engine is based on the very powerful O.S. Speed 21XZ-B specII and is an extraction of the world famous OS Max precision and technology together with some additional 'Rody' touch and development, equipped with a VS Spec combustion chamber with o-ring to protect this area from dirt, a 5-port sleeve and additional DLC coating on the whole crankshaft, a rear-cover with "pushplate". The difference between the VSB04 is a new carburetor type OS22E which gives a better response and better fuel-milage. The VS Racing VSB05 is suited for high competition 1/8scale off-road racing.This engine is intended for "EXPIERIENCED" users. FEATURES: Long Stroke Unique and Specific 5-Ports design CNC machined flat piston 14mm turbo crankshaft, balanced, lightened and silicone paste,DLC,'Rody' Competition Conrod Turbo combustion chamber VS Spec. 14mm high-speed main bearing 7mm high-speed front bearing with rubber protection VS Spec. lightweight cooling head VS Spec. Underhead and additional o-ring VS Spec. Crankcase VS Spec. rear-cover with 'pushplate' VS spec. aluminum lightweight slide carburettor type 22E with double adjustment 6.5mm aluminum restrictor This engine is developed to find the best balance between performances/relaiability and costs. Tech: Type : Off-Road Contents : .21(3.49cc) Bore : 16.27mm Stroke : 16.80mm Crankshaft : 14mm SG/SPT (buggy) DLC Main-Bearing : 14mm HighSpeed Front-Bearing : 7mm HighSpeed Cylinder : ABC Ports Intake : 5 Exhaust Port : 1 Carburator : Neck 15mm VS Spec. Cooling-Head : Light Off-Road Underhead : VS Spec for conical(Turbo) glowplug. RMP : Max Power @ 30K RPM (4-40K RPM range) Weight : 355Gr Tuend Pipe VS 2135 EFRA by Hipex for .21 off- road engines. Quarantees progressive power delivery at low rpm and top power at high rpm.High fuel economy. Recommended for VS Racing Engines and OS based off-road engines.