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Harley-Davidson Fat Boy

The Fat Boy is Harley-Davidson's iconic muscle Softail, known for its solid disc wheels, wide stance, and heavyweight cruiser styling. This page covers confirmed-fit parts for the Fat Boy across the Twin Cam and Milwaukee-Eight Softail generations, including suspension, exhaust, intake, and tuning. Check the fitment notes on each product page before you buy. Current stock only.

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Photo - Primary Sold out

2007-2011 Harley-Davidson Softail Dynojet Power Commander 6 Fuel Tuner

Dynojet
$533.32
$533.32 - $533.32
$533.32
$479.99
$479.99 - $479.99
$479.99

The Dynojet Power Commander 6 is a plug-and-play piggyback fuel tuner that lets you optimize the fuel and ignition timing curves on your Twin Cam S...

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Photo - Primary

2011-2020 Harley-Davidson Touring/Softail Dynojet Power Vision 4 Flash Tuner

Dynojet
$533.32
$533.32 - $533.32
$533.32
$479.99
$479.99 - $479.99
$479.99

The Dynojet Power Vision 4 is a Bluetooth flash tuner that pairs with the Dynojet mobile app to write performance tunes directly to your bike's ECU...

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2021-2023 Harley-Davidson Touring/Softail Dynojet Power Vision 4 Reflash Cable

Dynojet
$77.77
$77.77 - $77.77
$77.77
$69.99
$69.99 - $69.99
$69.99

The Dynojet Power Vision 4 Reflash Cable is a replacement diagnostic cable for the Power Vision 4 tuner on 2021 and newer Harley-Davidson Touring a...

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Harley-Davidson Dynojet Power Vision ECU Cable Delphi CAN

Dynojet
$77.77
$77.77 - $77.77
$77.77
$69.99
$69.99 - $69.99
$69.99

The Dynojet Power Vision ECU Cable is a replacement diagnostic cable for connecting a Power Vision flash tuner to Harley-Davidson motorcycles equip...

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User 1

Harley-Davidson Dynojet Power Vision ECU Cable Delphi J1850

Dynojet
$77.77
$77.77 - $77.77
$77.77
$69.99
$69.99 - $69.99
$69.99

The Dynojet Power Vision ECU Cable is a replacement diagnostic cable for connecting a Power Vision flash tuner to Harley-Davidson motorcycles equip...

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2012-2015 Harley-Davidson Softail Dynojet Power Commander 6 Fuel Tuner

Dynojet
$533.32
$533.32 - $533.32
$533.32
$479.99
$479.99 - $479.99
$479.99

The Dynojet Power Commander 6 is a plug-and-play piggyback fuel tuner that lets you optimize the fuel and ignition timing curves on your Twin Cam S...

View full details
Photo - Primary

2021-2023 Harley-Davidson Touring/Softail Dynojet Power Vision 4 Flash Tuner

Dynojet
$533.32
$533.32 - $533.32
$533.32
$479.99
$479.99 - $479.99
$479.99

The Dynojet Power Vision 4 is a Bluetooth flash tuner that pairs with the Dynojet mobile app to write performance tunes directly to your bike's ECU...

View full details