Harley-Davidson CVO ROAD GLIDE ST Big Bore Kits

Genuine Harley-Davidson

For the rider demanding no-compromise performance. This is the most displacement, and the most power, ever created by Harley-Davidson for a street-compliant crate performance engine. Engineered by the pros at Harley-Davidson and built from the bottom up in Milwaukee, this street-tuned 135-cubic-inch Screamin' Eagle Crate Engine is designed to run with a wide-open throttle at high engine speeds and provide instant passing power from cruising speed. Made for riders seeking maximum displacement, compression, and flow, it delivers 144 horsepower and 149 ft-lb of torque to the rear wheel. The 135ci engine compression ratio is 11.6:1. Exclusive 135 and Stage IV badging on the cylinder heads and timer cover highlight the powerplant. This street-ready performance motor features the finest Screamin' Eagle components. Many of these new components were informed by extensive testing by the Harley-Davidson Factory Racing Team for the King of the Baggers racing series. The 135ci Crate engine consists of: all-new Screamin' Eagle Extreme CNC-ported cylinder heads, new SE8-550 high-lift cam, new high-compression forged pistons, 68mm throttle body and new CNC-machined Extreme Flow 68mm intake manifold, high-performance cam bearing, high-performance tappets, new patent-protected 4.31" steel sleeve cylinders, 4 5/8" flywheel, 6.8 g/sec fuel injectors, and Screamin' Eagle Pro Billet Cam Plate and Oil Pump. Black Granite / black finish. Engineered and tested as a complete collection of high-performance components by the Screamin' Eagle pros at Harley-Davidson. This combination is designed for wide open throttle along with high end RPMs and a significant torque increase from a cruising speed. Ready for bolt-in installation in the Original Equipment-style chassis of your Touring bike. For models originally equipped with Variable Valve Timing (VVT), VVT will not be retained with this performance crate engine. No special fabrication or engine-mount relocation is required. Factory assembled at the Powertrain Operations facility in Milwaukee, Wisconsin.

Genuine Harley-Davidson

Screamin' Eagle Stage III - 121ci to 125ci

Genuine Harley-Davidson

For the rider demanding no-compromise performance. This is the most displacement, and the most power, ever created by Harley-Davidson for a street-compliant crate performance engine. Engineered by the pros at Harley-Davidson and built from the bottom up in Milwaukee, this street-tuned 135-cubic-inch Screamin' Eagle Crate Engine is designed to run with a wide-open throttle at high engine speeds and provide instant passing power from cruising speed. Made for riders seeking maximum displacement, compression, and flow, it delivers 144 horsepower and 149 ft-lb of torque to the rear wheel. The 135ci engine compression ratio is 11.6:1. Exclusive 135 and Stage IV badging on the cylinder heads and timer cover highlight the powerplant. This street-ready performance motor features the finest Screamin' Eagle components. Many of these new components were informed by extensive testing by the Harley-Davidson Factory Racing Team for the King of the Baggers racing series. The 135ci Crate engine consists of: all-new Screamin' Eagle Extreme CNC-ported cylinder heads, new SE8-550 high-lift cam, new high-compression forged pistons, 68mm throttle body and new CNC-machined Extreme Flow 68mm intake manifold, high-performance cam bearing, high-performance tappets, new patent-protected 4.31" steel sleeve cylinders, 4 5/8" flywheel, 6.8 g/sec fuel injectors, and Screamin' Eagle Pro Billet Cam Plate and Oil Pump. Black highlights & black finish. Engineered and tested as a complete collection of high-performance components by the Screamin' Eagle pros at Harley-Davidson. This combination is designed for wide open throttle along with high end RPMs and a significant torque increase from a cruising speed. Ready for bolt-in installation in the Original Equipment-style chassis of your Touring bike. For models originally equipped with Variable Valve Timing (VVT), VVT will not be retained with this performance crate engine. No special fabrication or engine-mount relocation is required. Factory assembled at the Powertrain Operations facility in Milwaukee, Wisconsin.

Genuine Harley-Davidson

For the rider demanding no-compromise performance. With the largest displacement and the most power of any Harley-Davidson Stage Kit, this 121ci to 135ci Stage IV Kit was engineered by the pros at Harley-Davidson to deliver instant arm-stretching torque through the entire rpm range. Made for riders seeking maximum displacement, compression, and flow, it delivers 144 horsepower and 149 ft-lb of torque to the rear wheel. This Stage IV Kit features the finest Screamin' Eagle components. Many of these new components were informed by extensive testing by the Harley-Davidson Factory Racing Team for the King of the Baggers racing series. The Stage IV kit consists of all-new Screamin' Eagle Extreme CNC-ported cylinder heads, 68mm throttle body and new cast 68mm intake manifold, new SE8-550 high-lift cam and 6.8 g/sec fuel injectors that work together to feed the engine large volumes of air and fuel to help maximize power. New forged high-compression pistons and rings are designed to withstand increased combustion forces. Also includes high-performance tappets, new patent-protected 4.31" steel sleeve cylinders, and Screamin' Eagle Pro Billet Cam Plate and Oil Pump. Screamin' Eagle and Stage IV badging on the cylinder heads and timer cover highlights the powerplant. Black Granite. Engineered and tested as a complete collection of high-performance components by the Screamin' Eagle pros at Harley-Davidson. This combination is designed for wide open throttle along with high end RPMs and a significant torque increase from a cruising speed. Provides thrilling acceleration when twisting the throttle. Can be installed without removing the engine from chassis. For models originally equipped with Variable Valve Timing (VVT), VVT will not be retained with this performance Stage IV kit. Race only.

Genuine Harley-Davidson

For the rider demanding no-compromise performance. This is the most displacement, and the most power, ever created by Harley-Davidson for a street-compliant crate performance engine. Engineered by the pros at Harley-Davidson and built from the bottom up in Milwaukee, this street-tuned 135-cubic-inch Screamin' Eagle Crate Engine is designed to run with a wide-open throttle at high engine speeds and provide instant passing power from cruising speed. Made for riders seeking maximum displacement, compression, and flow, it delivers 144 horsepower and 149 ft-lb of torque to the rear wheel. The 135ci engine compression ratio is 11.6:1. Exclusive 135 and Stage IV badging on the cylinder heads and timer cover highlight the powerplant. This street-ready performance motor features the finest Screamin' Eagle components. Many of these new components were informed by extensive testing by the Harley-Davidson Factory Racing Team for the King of the Baggers racing series. The 135ci Crate engine consists of: all-new Screamin' Eagle Extreme CNC-ported cylinder heads, new SE8-550 high-lift cam, new high-compression forged pistons, 68mm throttle body and new CNC-machined Extreme Flow 68mm intake manifold, high-performance cam bearing, high-performance tappets, new patent-protected 4.31" steel sleeve cylinders, 4 5/8" flywheel, 6.8 g/sec fuel injectors, and Screamin' Eagle Pro Billet Cam Plate and Oil Pump. Black highlights & chrome finish. Engineered and tested as a complete collection of high-performance components by the Screamin' Eagle pros at Harley-Davidson. This combination is designed for wide open throttle along with high end RPMs and a significant torque increase from a cruising speed. Ready for bolt-in installation in the Original Equipment-style chassis of your Touring bike. For models originally equipped with Variable Valve Timing (VVT), VVT will not be retained with this performance crate engine. No special fabrication or engine-mount relocation is required. Factory assembled at the Powertrain Operations facility in Milwaukee, Wisconsin.

Genuine Harley-Davidson

For the rider demanding no-compromise performance. This is the most displacement, and the most power, ever created by Harley-Davidson for a street-compliant crate performance engine. Engineered by the pros at Harley-Davidson and built from the bottom up in Milwaukee, this street-tuned 135-cubic-inch Screamin' Eagle Crate Engine is designed to run with a wide-open throttle at high engine speeds and provide instant passing power from cruising speed. Made for riders seeking maximum displacement, compression, and flow, it delivers 144 horsepower and 149 ft-lb of torque to the rear wheel. The 135ci engine compression ratio is 11.6:1. Exclusive 135 and Stage IV badging on the cylinder heads and timer cover highlight the powerplant. This street-ready performance motor features the finest Screamin' Eagle components. Many of these new components were informed by extensive testing by the Harley-Davidson Factory Racing Team for the King of the Baggers racing series. The 135ci Crate engine consists of: all-new Screamin' Eagle Extreme CNC-ported cylinder heads, new SE8-550 high-lift cam, new high-compression forged pistons, 68mm throttle body and new CNC-machined Extreme Flow 68mm intake manifold, high-performance cam bearing, high-performance tappets, new patent-protected 4.31" steel sleeve cylinders, 4 5/8" flywheel, 6.8 g/sec fuel injectors, and Screamin' Eagle Pro Billet Cam Plate and Oil Pump. Black Granite / Chrome finish. Engineered and tested as a complete collection of high-performance components by the Screamin' Eagle pros at Harley-Davidson. This combination is designed for wide open throttle along with high end RPMs and a significant torque increase from a cruising speed. Ready for bolt-in installation in the Original Equipment-style chassis of your Touring bike. For models originally equipped with Variable Valve Timing (VVT), VVT will not be retained with this performance crate engine. No special fabrication or engine-mount relocation is required. Factory assembled at the Powertrain Operations facility in Milwaukee, Wisconsin.