In stock

S&S Cycle 129" Power Package — HPT496 — Gear Drive — Oil Cooled — Black with Highlights — 107" M8

S&S Cycle · #0904-0185 · Complete Engines & Rebuild Kits / Engine

Big bore bolt-on kit increases 107" M8 to 129" with no case machining required
Big bore 4.320" cylinder with 11.0:1 forged pistons
S&S oil pump/cam plate
Passage plugs are removable for servicing
Independent scavenge sections for flywheel cavity and cam chest

$3497.95

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

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Description & features23 features

Big bore bolt-on kit increases 107" M8 to 129" with no case machining required
Big bore 4.320" cylinder with 11.0:1 forged pistons
S&S oil pump/cam plate
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 with pushrod tubes
S&S premium tappets
S&S hard anodized, black coated tappet cuffs are billet aluminum construction
S&S valve springs; work with cams up to 0.605" lift
High performance conical single wire spring design
HPT496 cam designed for big bore applications
MLS (multi-layered steel) head gasket
Includes 129 cam cover badge
Made in the USA
Retains stock engine height.
Works with stock crankcases.
Works with the stock and S&S roller rocker arms.
Original engine serial numbers are retained.
Compatible with the stock valve springs, both first generation (round port) and second generation (oval port).

Specifications15 specs

Type: Engine
Style: HPT496 Series
Cam Drive Type: Gear
Bore Size: 4.320"
Cooling System: Oil Cooled
Model: Performance Kit
Color/Finish: Highlighted Fins, Black
Compression Ratio: 11.0:1
Units: Kit
Displacement: 129"
Features: Chrome Pushrod Tubes
Riding Style: Street
Shipping weight: 44.9 lb
Package size: 27.3 × 12.3 × 20.5 in
Country of origin: USA

Fitment47 models · Harley-Davidson

Harley-Davidson47 models

Electra Glide Police FLHTPI2017–2025
Electra Glide Police FLHTP2025
FLDE Deluxe 1072018–2020
FLFB Fat Boy 1072018–2019
FLFBS Fat Boy 1142018–2024
FLH Electra Glide Revival2021
FLHC Heritage Classic 1072018–2021
FLHC Heritage Classic 1172025
FLHCS Heritage Classic 1142018–2024
FLHFB Electra Glide Highway King2023
FLHR Road King2017–2022
FLHRXS Road King Special2017–2025
FLHT Electra Glide Standard2019–2022
FLHX Street Glide2017–2025
FLHXS Street Glide Special2017–2023
FLHXST Street Glide ST2022–2023
FLI Hydra-Glide Revival2024
FLRT Freewheeler2017–2025
FLSB Sport Glide 1072018–2024
FLSL Softail Slim 1072018–2021
FLTRT Road Glide 32023–2025
FLTRX Road Glide2017–2025
FLTRXS Road Glide Special2017–2023
FLTRXST Road Glide ST2022–2023
FXBB Street Bob 1072018–2020
FXBBS Street Bob 1142021–2024
FXBR Breakout 1072018–2019
FXBR Breakout 1172023–2025
FXBRS Breakout 1142018–2020
FXDRS FXDR 1142019–2020
FXFB Fat Bob 1072018–2019
FXFBS Fat Bob 1142018–2023
FXLR Low Rider 1072018–2020
FXLRS Low Rider S 1142020–2021
FXLRS Low Rider S 1172022–2025
FXLRST Low Rider ST 1172022–2025
FXRST Low Rider El Diablo 1172022
FXST Softail Standard 1072020–2024
Road Glide Custom FLTRX2025
Road Glide Police FLTRXP2024–2025
Road King Police FLHP2017–2025
Softail Breakout FXBR2025
Softail Fat Boy FLFB2025
Softail Low Rider S FXLRS2025
Softail Low Rider ST FXLRST2025
Softail Street Bob FXBB2022, 2025
Street Glide EFI FLHX2025

Fitment comes from the catalog data for this part. 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 #: 0904-0185
S&S Cycle part #: 310-1399

Shipping

In stock. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is checked again before your card is charged.

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

Questions4 answers

Is it in stock?: Yes — it’s in stock 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?: It’s listed 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’s new and genuine, straight from Salto — S&S Cycle part #310-1399.