This Thunderstroke® Stage 3 116 ci Big Bore Kit delivers approximately 20% more horsepower than a stock 111 ci engine along with significantly improved throttle response and proven reliability and ride quality. This kit is also an outstanding performance value as it contains fewer components than earlier Stage 3 kits. Dealer installation is required, as your dealer will replace several internal engine components with high-performance Stage 3 equipment. The dealer will also upload revamped fuel mapping to tune the Stage 3 116 ci engine for optimal performance. This accessory is not compliant on 2022 Chief, Chief Bobber and Super Chief for use in California. Important Regulatory InformationThis item is only available for purchase and installation at your dealer. To find your dealer, click here.
One Thunderstroke ® 116 ci Stage 3 Big Bore Kit20% more horsepower15% more torqueKit includes everything needed for engineDealer installation requiredRequires Stage 1 Exhaust, Exhaust Tips, and Stage 1 Performance Air Cleaner or Thunderstroke ® High Flow Air Cleaner
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