S&S Cycle 124" Power Package Engine Kit

Elevate your motorcycle's performance to an exhilarating new level with the S&S Cycle 124" Power Package. This comprehensive engine kit is engineered for a straightforward bolt-on installation, eliminating the need for complex case machining, making a significant power upgrade more accessible than ever before.

Description

Unleash the full potential of your Harley-Davidson VVT model with this meticulously designed performance kit. The S&S Cycle 124" Power Package transforms your engine, boosting displacement to a massive 124" (4.250" bore x 4.375" stroke) and achieving a robust 11.1:1 compression ratio for incredible torque and horsepower. At its heart are durable forged pistons and the renowned S&S 550 camshaft, providing an aggressive powerband suitable for both street and track.

The advanced oil pump and cam plate are precision machined from billet aluminum, featuring independent scavenge sections for superior oil management in the flywheel cavity and camchest. With a 44% increase in supply flow and a 58% increase in scavenge flow, along with removable passage plugs for servicing, your engine receives optimal lubrication. Debris screens and a camchest magnet further protect vital components. The pressure relief valve is conveniently adjustable while installed.

This kit also includes S&S Quickee pushrods for rapid, hassle-free installation, paired with S&S premium tappets housed in hard anodized, billet aluminum, black coated tappet cuffs. These components ensure exceptional tappet stability even under high lift and high RPM conditions. The included valve springs are engineered to work seamlessly with camshafts up to 0.605" lift, ensuring reliable valve train operation. Proudly made in the USA, this S&S Cycle big bore kit represents the pinnacle of American engineering and performance for your motorcycle.

Features & Highlights

• Massive 124" Displacement: Transform your engine with a substantial increase in displacement, bore (4.250") and stroke (4.375"), paired with an aggressive 11.1:1 compression ratio for dramatic gains in power and torque.
• Effortless Bolt-On Installation: Designed as a complete kit, this power package requires no case machining, offering a direct and simplified upgrade path for enhanced performance.
• Advanced Billet Oil Pump & Cam Plate: Experience superior lubrication and engine protection with a precision-machined billet aluminum oil pump offering 44% increased supply and 58% increased scavenge flow, adjustable pressure relief, and integrated debris management.
• High-Performance Internals: Equipped with durable forged pistons, S&S Quickee pushrods, S&S premium tappets with billet cuffs, and an S&S 550 camshaft, ensuring reliability and peak performance under demanding conditions.
• Optimized Valve Train: Includes high-quality valve springs, top collars, keepers, valve seals, and bottom collars, compatible with camshafts up to 0.605" lift for robust and stable valve operation.
• American Made Quality: Manufactured in the USA, guaranteeing exceptional craftsmanship, precise engineering, and a product built to withstand the rigors of high-performance riding.

Technical Specifications

• Product Name: Performance Kit / Power Package
• Model: Power Package 550C
• Displacement: 124"
• Bore Size: 4.250"
• Stroke Length: 4.375"
• Compression Ratio: 11.1:1
• Cam Drive Type: Chain
• Cooling System: Oil Cooled
• Color/Finish: Highlighted Fins, Wrinkle Black
• Included Components: Oil pump/cam plate, Quickee pushrods with gloss black covers, S&S premium tappets, tappet cuffs, S&S 550 camshaft, valve springs (with top/bottom collars, keepers, valve seals), cam chain tensioner, forged pistons.
• Units: Kit

Important to Know

• Compatibility: Will fit VVT models.
• Exclusions: Not for any Trike models.
• Not Included: Intake/rocker cover gaskets are not included and must be purchased separately.