Best Upgrades for a 2020 Heritage Classic
Ask five people what to put on a 2020 Heritage Classic first and you'll get five different answers, mostly guesses. Here's ours, and it isn't a guess — every part below is verified to fit this exact bike.
The Softail platform hides its rear suspension inside the frame, so from twenty feet it reads like a hardtail — but every version rides like a modern bike. It's the lineup's most personalized family: Fat Boy, Street Bob, Low Rider S, Breakout, Heritage Classic, and more all share the same bones — riders take them everywhere from clean OEM+ builds to full club-style customs, and no two end up looking alike.
A verified starting build
Generated by the same verified-fitment engine that powers the builder — refreshed as the catalog grows, priced from real listings.
Arlen Ness Method Clear Sucker Air Cleaner Kit
$449.96Air Intake
One of the most common first upgrades on any M8 — a freer-breathing intake pairs naturally with a cam or exhaust change later.
Zippers Performance Zipper's M8 128" Cylinder Kit, -6.12cc Dished Pistons
$1,529.00Big Bore Kits
A larger-displacement cylinder and piston kit — real horsepower and torque gains, and real engine work to install.
⚙ Designed for stock heads - the piston dome volume determines which. Zipper's states the head requirement per kit, so choosing the wrong dome for the rider's heads changes compression.
⚠ Closed-course/race product — confirming legal use for your riding is on you.
Feuling REAPER M-Eight Cam - 538 Grind (Chain Drive)
$329.95Cams
The heart of an M8 performance build — cam choice shapes where the engine makes its power.
⚠ Closed-course/race product — confirming legal use for your riding is on you.
Fuel Moto Fuel Moto Chain Drive Conversion - M8 Softail
$299.95Clutch
Clutch upgrades change lever pull and engagement feel — a common pairing with a performance build that's added more power than the stock clutch was sized for.
Bad Dad Competition Series 2-into-1 Exhaust
$1,095.00Exhaust
The most-heard upgrade on any build — tone, weight savings, and the foundation most performance work builds on.
⚠ Closed-course/race product — confirming legal use for your riding is on you.
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Frequently asked questions
What's the most popular first upgrade for a 2020 Heritage Classic?
Exhaust, almost always — usually paired with an air intake and a tuner so the sound and the breathing change together. See the build above for what that combination actually costs and fits on your 2020 Heritage Classic.
Will a part fit my 2020 Heritage Classic without anything else changing?
If it's shown in your build above, yes. Every part on this page is checked against your 2020 Heritage Classic's exact fitment data before it's ever recommended — and if something needs a companion part to work right, like a tuner with certain cams, that's called out on the item itself, not left for you to find out after it arrives.
How much does a typical first build cost for a 2020 Heritage Classic?
It depends on what you're after. Your build above shows one real, verified option priced from actual listings — click through to personalize it to your own budget and see it change in real time.