Running the stock airbox on your CB500 or CB550 four? This is the OEM-style replacement air filter — a direct factory-style fit that keeps your bike breathing right. Pick your model below.
On the inline-four CB500 and CB550, the airbox feeds all four carbs, so a clean, correctly-shaped filter keeps the factory jetting working the way Honda set it up. This is a direct OEM-style replacement for the stock element. The CB500 uses its own unique filter; the CB550 came in two versions that differ only in the outlet hole size — the larger hole flows a little more air, the smaller hole restricts a little more.
Which filter for your bike:
The two CB550 filters are interchangeable in a pinch — they differ only in outlet hole size — but the K3/K4 used the smaller hole from the factory. Choose your model at checkout.
Difficulty: Beginner
Keeping it clean: This is a paper element — clean it by tapping out the loose dust and blowing compressed air through from the inside. Don’t oil it.
The CB500 (1971–1973) uses its own unique filter. The CB550K and CB550F from 1974–1977 used the large-hole filter; the CB550 K3 and K4 (1977–1978) used the small-hole filter, which restricts a little more air. They’re interchangeable in a pinch, but match your model and year at checkout.
No. It’s a paper element, so clean it by tapping out the dust and blowing compressed air through from the inside — don’t oil it.
No — this is the replacement filter element, not the complete airbox.
Just the outlet hole size: the larger hole flows a little more air, the smaller hole restricts a little more. The CB550 K3/K4 used the smaller hole from the factory.
Last updated: June 2026
