The new Thunder Stroke® 116 ci Stage 3 Big Bore Kit contains everything needed to completely transform your Thunder Stroke® 111 into a high-performance powerhouse. You’ll experience quicker acceleration and significantly increased torque – without sacrificing reliability.

This kit was developed by the Indian Motorcycle® engineering team to provide riders with a high-performance experience on every ride.

Thunderstroke 116


  • 20% more horsepower than the stock engine
  • 15% more torque than stock
  • Significant improvement in quarter-mile ETs
  • Increased compression ratio, from 9.5:1 to 11:1


The kit includes everything needed for this high-performance transformation, including:

  • NEW cylinders
  • NEW Big Bore pistons and rings
  • 60mm throttle body (6mm larger than stock) for enhanced air flow
  • A high-flow intake manifold to match the larger 60mm throttle body
  • Stage 3 cams with increased lift and duration developed specifically for the Big Bore Kit
  • Stage 3 ECM calibration included with a performance throttle map (not shown)
  • High-performance valve springs designed for the aggressive cam profile
  • Heavy duty clutch springs designed to handle the significantly increased torque
  • 116 badging kit including primary and cam cover to let people know what you’re running

Thunderstroke 116

Dealer installation required. Also requires Thunder Stroke® Stage 1 Slip-On Exhaust Kit, (2879768-156/266 or 2879769-156/266), Exhaust Tips (part numbers vary) and Stage 1 Performance Air Cleaner (2881779-156/521) or Thunder Stroke® High Flow Air Cleaner (2880654-156/266), each sold separately. Deaer installation required. Installation does not void warranty. Kit warranty is 1 year from date of purchase.