STI engines feature serialized crankshafts, cases and rods for better quality control. Each crankcase is hand selected and blue printed for the best tolerances. The sleeve is hand matched to the case to improve the flow through all the ports. The connecting rod features a surface treatment that ensures maximum strength. The crank shaft has an aerospace coating to improve durability and performance. Premium bearings are hand matched to the crank shaft and case tolerances. Add this all up and you have true factory team performance. The STI engine also features a ceramic rear engine bearing, to provide maximum performance!

Features

• Front bearing has a rubber seal to keep out dirt
• Ceramic rear engine bearing for maximum performance!
  
• Aerospace coating on the crank decreases wear and increases strength
• ABC sleeve has extra work done outside the sleeve to increase flow through the intake ports

Specifications:
Displacement: 3.5 cc
Stroke: 16.90mm
Bore: 16.20mm
Ports: 5+2
Piston: CNC
Sleeve: AAC
Exhaust: Rear
Weight: 322 grams
Crankshaft: 14.20mm SG Type
Carburetor: Composite / Slide / Single Adj.
Plug Type: Turbo