In warehouse stock

S&S Cycle 129" Power Pack — 550 Chain Drive — Oil Cooled — Wrinkle Black w/Highlight Fins — 107" M8

S&S Cycle · #0904-0166 · Top End / Engine

Big-bore bolt-on kit increases 107" M8 to 129" with no case machining required
4.32" bore cylinders with 11.0:1 compression ratio forged pistons
S&S oil pump/cam plate with blue anodized finish
Passage plugs are removable for servicing
Independent scavenge sections for flywheel cavity and cam chest

$3294.95

In stock. Ships in 2–4 business days · free shipping over $150.

Can’t ship to California.

Questions? Call the shop: 801-361-3010

Real shop · real humans · 1231 N 1300 W Ste A, Centerville, UT 84014

Description & features18 features

Big-bore bolt-on kit increases 107" M8 to 129" with no case machining required
4.32" bore cylinders with 11.0:1 compression ratio forged pistons
S&S oil pump/cam plate with blue anodized finish
Passage plugs are removable for servicing
Independent scavenge sections for flywheel cavity and cam chest
Debris screen in both scavenge pickups
Magnet in cam chest to help prevent debris from entering the oil pump
Increased oil flow capacity on both the oil feed and scavenge side
Adjustable pressure relief valve can be adjusted with the unit installed in the engine
Quickee pushrods
S&S premium tappets
S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
S&S 550 cams are designed for big bore applications
S&S valve springs work with cams up to 0.605" lift
High-performance conical single wire spring design
All necessary gaskets, bearings and hardware for bolt on installation included
Made in the USA
Not for any Trike models.

Specifications15 specs

Riding Style: Street
Features: Black Pushrod Tubes
Stroke Length: 4-3/8"
Model: Power Package
Type: Engine
Color/Finish: Wrinkle Black, Highlighted Fins
Units: Kit
Displacement: 129"
Compression Ratio: 11.0:1
Cam Drive Type: Chain
Bore Size: 4.320"
Cooling System: Oil Cooled
Shipping weight: 44.5 lb
Package size: 27 × 12.3 × 20.5 in
Country of origin: USA

Fitment10 models · Harley-Davidson

Harley-Davidson10 models

FLDE Deluxe 1072018–2020
FLFB Fat Boy 1072018–2019
FLHC Heritage Classic 1072018–2021
FLSB Sport Glide 1072018–2024
FLSL Softail Slim 1072018–2021
FXBB Street Bob 1072018–2020
FXBR Breakout 1072018–2019
FXFB Fat Bob 1072018–2019
FXLR Low Rider 1072018–2020
FXST Softail Standard 1072020–2024

Fitment comes from the distributor’s catalog. Double-check your year, model and trim before you order — or call the counter at 801-361-3010 and we’ll check it with you.

Part numbers

Salto part #: 0904-0166
S&S Cycle part #: 310-1225C

Shipping

In stock at a distributor warehouse. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is re-checked with the warehouse before your card is charged.

California: this part can’t ship to a California address.

Questions4 answers

Is it in stock?: Yes — the distributor shows it on a shelf at a regional warehouse right now. We check again the moment you order, before anything is charged.
How fast will it get to me?: Usually 2–4 business days by ground.
Will it fit my machine?: The distributor lists it for the models in the Fitment section above. Not sure about your trim or year? Call the counter at 801-361-3010 and we’ll check it with you.
Is this genuine S&S Cycle?: Yes. It ships new from the same distributors the big online stores buy from — S&S Cycle part #310-1225C.