Best Upgrades for a 2021 CVO Road Glide
Ask five people what to put on a 2021 CVO Road Glide 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 Touring family is built for the miles that actually add up — full fairings, real storage, and a chassis tuned for hours in the saddle, not just the ride to the coffee shop. Street Glide's handlebar-mounted batwing fairing gives it its signature silhouette; Road Glide's frame-mounted sharknose does the same job with a steadier feel at highway speed. Together they're Harley's best-selling family by a wide margin — most Harley riders on the highway are riding one of these two.
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 Monster Sucker Air Cleaner Chrome
$314.95Air 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.
⚙ Not for VVT engines - excludes 117 VVT and 121 VVT trims
⚠ Closed-course/race product — confirming legal use for your riding is on you.
Fuel Moto Fuel Moto Chain Drive Conversion - FLH Touring
$749.95Clutch
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 True Dual Headers
$800.00Exhaust
The most-heard upgrade on any build — tone, weight savings, and the foundation most performance work builds on.
Prefilled, no signup needed.
Frequently asked questions
What's the most popular first upgrade for a 2021 CVO Road Glide?
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 2021 CVO Road Glide.
Will a part fit my 2021 CVO Road Glide without anything else changing?
If it's shown in your build above, yes. Every part on this page is checked against your 2021 CVO Road Glide'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 2021 CVO Road Glide?
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.