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Today, we’re talking about Stage Kit Upgrades. If you want to add more power, torque and throttle response to your Harley, we've got your back. We use Screamin’ Eagle performance parts to maximize your performance without voiding your warranty or sacrificing reliability. For a limited time only, we're making your upgrade even better - We're giving you a FREE Dyno Tune with your Stage III or IV Upgrade, or $50 OFF a Dyno Tune with your Stage I or II Upgrade.

Wondering how to get the most performance out of your Harley, or what Stage Upgrade is right for you? Here's what you need to know:

Screamin' Eagle Milwaukee-Eight Engine Stage IV Upgrade

Our Screamin' Eagle Milwaukee-Eight Engine Stage IV Upgrade is the largest bolt-on engine upgrade available for any Milwaukee-Eight motor. “We’ve designed this amazing Screamin’ Eagle Stage IV kit for the performance fanatic,” said Harley-Davidson Senior Product Manager Scott Miller. “Big-bore cylinders, a monster throttle body, ported heads, and a high-lift cam combine to deliver stump-pulling torque throughout the rpm range and up to 52 % more power than the stock Milwaukee-Eight engine.” “The Screamin’ Eagle Milwaukee-Eight Stage IV Kit is a system-matched collection of components created by the same Harley-Davidson engineering team that designed and developed the Milwaukee-Eight engine,” said Miller. “Upgrading the engine with genuine H-D parts supports a performance gain without sacrificing warranty, drivability or reliability. There are no compromises.”

The 114CI to 131CI Stage IV Kit includes Kit includes CNC Ported Cylinder Heads with Performance Valve Springs, 64mm Throttle Body, High Flow Injectors, 4.075" Bolt-On Cylinders, 11:1 High Compression Aluminum Coated Pistons & Rings, SE8-515 Cam, Cam Bearing Upgrade, High Performance Tappets, Multi-layer Coated Head Gaskets, Top End, Cylinder Base and Cam Cover Gaskets, High Capacity Clutch Springs and Plates. The Stage IV Upgrade gives you maximum horsepower, and we’re making it even better with a FREE Dyno tune! We want you to make the very best of your Stage IV upgrade, so we’ll perform a detailed inspection and test your engine and all its components for maximum performance.

Screamin' Eagle Milwaukee-Eight Engine Stage III Upgrade

A Stage III Upgrade will take your Stage I-equipped Milwaukee-Eight 107 to 114CI, or your Milwaukee-Eight 114 to 117CI for additional horsepower throughout the entire RPM range. Behind a Stage III Kit, you'll feel like you're riding solo even when loaded up with a passenger and cargo. The Stage III Kit includes SE 4.075" Cylinders, 11:1 Coated Aluminum Pistons, High-Performance Piston Rings, SE8-498 Camshaft, SE Performance Valve Springs, SE High Performance Tappets, Multi-Layer Coated Head Gaskets, and Cylinder Base with Cam Cover Gaskets. Stage III kits feature bolt-on cylinders that can be installed without removing the engine from your motorcycle, reducing the installation time. Throw in a FREE Dyno Tune, and your Harley will be running better than ever!

Screamin' Eagle Milwaukee-Eight Engine Stage II Upgrade

Your Stage II Upgrade will feature a performance camshaft that increases air flow for greater intake and exhaust flow. There are two options for a Stage II - Torque or Power. You can choose the Torque Kit for on-demand throttle response from low to mid RPM at cruising speed. With the Torque kit, you can pass slow-moving vehicles without downshifting and compensate for the weight of a passenger and luggage. For an adrenaline-pumping speed boost, choose the Power Kit. It delivers power at 3000 RPMs and produces more than 90 rear wheel horsepower from 4,500 RPMs to redline. The Torque Kit components include a Screamin’ Eagle SE8-447 Cam, Adjustable Pushrods, Pushrod Covers, O-Rings, and a Cam Cover Gasket. The Power Kit is ideal for riding aggressively while downshifting to keep the engine operating in the higher RPM range. The Power Kit components include a Screamin’ Eagle SE8-462 Cam, Adjustable Pushrods, Pushrod Covers, O-Rings, and a Cam Cover Gasket. Whether you choose the Torque or the Power Kit, we're also giving you $50 OFF your Dyno Tune with your upgrade for a limited time only!

Screamin' Eagle Milwaukee-Eight Engine Stage I Upgrade

A Stage I Upgrade sets the foundation for future Milwaukee-Eight performance upgrades and gives you a 5-10% increase in power that you’ll feel at any RPM. With high-performance air cleaners and slip-on mufflers, a Stage I Upgrade will enhance your bike’s performance, look and sound without engine disassembly or special tools. When it comes to the air cleaners and exhaust system, you can choose your additions to customize the look of your Harley. Come to Harley-Davidson of Asheville to get some expert assistance in choosing and ordering your customizations. Take advantage with $50 OFF your Dyno Tune for maximum performance.

We hope this post helps you make sense of the Screamin' Eagle Milwaukee-Eight Engine Stage Kit Upgrades and inspires you to add more power, torque and throttle response to your bike! Give us a call at 828-581-2000 with any questions, or schedule your Upgrade Appointment online!