LEGION 409ci / 613ci

The AC-AERO Long Stroke Legion kits for the Lycoming O-360, O-540 variants.

A complete kit that comes with AC-AERO Crank, Connecting Rods, Pistons & Wrist Pins. Can also be combined with the Gladiator or Centurion Liquid cooled cylinders for even more increased power and weight savings. 

Increase your power

The Legion 409 and Legion 613 produce 228hp and 342hp respectively. This provides a significant power increase for the same packaging and with less weight. These experimental kits are available from our approved build centers. Ideal for all experimental fixed wing and rotary applications.

LEGION 409 / 613ci

Individually and custom build for each and every customer. We can recondition your existing Lycoming 360 & 540 engine and convert to a 409ci and 613ci respectively.  We can tailor to a number of budgets and performance requirements. Why not combine the Legion series products with our Gladiator of Centurion Liquid Cooled cylinders. Our kits are available exclusively through our approved build centers.

Legion™ 409 and Legion™ 613 KITS:

 

LEGION™ 613ci

342hp
$32,500
  • 613ci Crank
  • Pistons (6)
  • Compression & Oil Ring Kit
  • Circlip Kit
  • Connecting Rods (6)
  • Wrist Pin
  • Lycoming 0-540 Core used or new

CHECK AVAILABILITY>>

LEGION + GLADIATOR

The beauty of the Legion 344ci and 409ci  kit is that it can also be combined with our Gladiator Liquid cooled cylinders for even more performance and weight savings. 

REQUEST PRICING >>

LEGION + CENTURION

The beauty of the Legion 613ci kit is that can also be combined with our Centurion™ Liquid cooled cylinders for even more performance and weight savings. 

REQUEST PRICING >>