S&S 128" Power Pack M8 '17-'19 4.500" Gear

Buy all of the matched parts in one kit and save $$$!

Big Bore Kit:

• 107" to 124" Big Bore Kit
• Winkle Black Finish with Fin Highlighting
• Bolt on kit. No case machining required
• 4.250" bore
• Forged Pistons
• 11:1 Compression Ratio

Oil Pump/Cam Plate

• Precision Machined from Billet Aluminum
• Blue Anodized Finish
• Passage Plugs Removeable for servicing
• Independant Scavenge Sections for Flywheel Cavity and Cam Chest
• Debris Screens in both scavenge pickups
• Magnet in Cam Chest to help to stop debris from entering oil pump
• Increased Flow Capacity on both Feed and Scavenge side
• Adjustable Pressure Relief Valve is adjustable with unit installed in engine

Pushrods:

• Quickee Pushrods
• Chrome pushrod tubes

Tappets:

• S&S Precision Tappets

Tappet Cuffs:

• Hard Anodized Black Coating
• Billet Aluminum Construction
• Stronger than Stock Material eliminates Distortion
• Improve tappet stability in high lift and high rpm situations

Cam:

• S&S 550 Cam- Designed for Big Bore Applications
• 550C Chain Drive

Valve Springs:

• Work well with cams up to .605 lift
• High Performance Conical Single Wire Spring

MADE IN USA

S&S does not recommend compression ratios higher than 10:1 for Tri Glide® or other three wheel models (including conversions) due to extra loads caused by the lugging nature of these bikes. Detonation and subsequent engine damage may result.