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  • Extreme power output
  • 60% more peak horsepower than the TRX 2.5
  • Nearly 50% more total power under the curve
  • Consistent and smooth throughout the entire power band
  • Straight-through exhaust flow
  • TRX composite slide carburetor
  • Push-button EZ-Start® electric starting system
  • TRX IPS crankshaft
  • Knife-edged connecting rod
  • Long rod design
  • Offset wrist pin
  • Smooth tubular header
  • Large aluminum blue-anodized cooling head
  • Molded head protector protects the cooling head from damage
  • Head protector is securely fastened with screws
  • High-volume air filter does not restrict air intake
  • O-ring exhaust gasket
  • Super-light piston and rod
  • Square reciprocal geometry
  • High-performance ball bearings
  • 100% drop-in compatibility with TRX 2.5 equipped models
  • Backed by Traxxas Lifetime Engine Replacement Plan.
Part # Available Engines  
5407 TRX 3.3 Engine, IPS shaft with recoil pull starter
For use in all Traxxas TRX 2.5 and TRX 3.3 equipped vehicles. Pull starter can be removed to install the Traxxas EZ-Start® system (sold separately).		  
5409 TRX 3.3 Engine, multi-shaft with recoil pull starter
Includes threaded crankshaft inserts for "short" and "standard" applications. Pull starter can be removed to install the Traxxas EZ-Start system (sold separately).		  
5404 TRX 3.3 Engine, IPS shaft without starter
For use in all Traxxas TRX 2.5 and TRX 3.3 equipped vehicles with flywheel access. Requires use of an electric bump starter or starter box. Does not accept a pull start or the Traxxas EZ-Start system.		  
5406 TRX 3.3 Engine, multi-shaft without starter
Includes threaded crankshaft inserts for "short" and "standard" applications. Requires use of an electric bump starter or starter box. Does not accept a pull start or the Traxxas EZ-Start system.		  
5270R EZ-Start 2 electric starting system
Includes EZ-Start controller, drive unit with high-torque motor, wiring harness, and mounting hardware. Requires a 7.2V battery pack (sold separately).