Sprint Filter CM231P14 Air Filter for Royal Enfield Classic 350, Meteor 350, Hunter 350 & Bullet 350

Sprint Filter CM231P14 Air Filter for Royal Enfield J-series 350

The J-series 350 is the most common motorcycle in this catalogue and the one that sees the most dust. The Sprint Filter CM231P14 covers the whole platform. It drops straight into the factory airbox and replaces the paper element for good.

A dry filter, not an oiled one

Almost every performance air filter sold in India is oiled cotton gauze. It works, but it comes with a routine: strip it, wash it, dry it completely, re-oil it evenly, and hope you did not over-oil it.

Sprint Filter's P14 media is different. It is a dry filter: to service it you take it out, blow it through with compressed air, and put it back. No cleaning solvents, no oil, no drying time, and no risk of oil residue migrating downstream into the intake tract of a fuel-injected engine.

The numbers Sprint publishes

Sprint Filter is unusually specific about its media, which makes it possible to compare grades honestly rather than by adjective:

• Filtration: traps debris down to 14 microns
• Airflow: 1,800 litres per square metre per second
• Media: dry non-woven filtering media
• Servicing: dry, compressed air only

Which Sprint grade is right for you

Sprint make three media grades, and the trade-off between airflow and filtration is real. More airflow means a coarser weave:

• P08 — 80 micron, 5,050 l/m²/sec. Road and track use on sealed surfaces.
• P14 (this filter) — 14 micron, 1,800 l/m²/sec. Finer filtration for genuinely dusty routes and high-mileage daily use.
• T12 — 7 micron, 560 l/m²/sec. Off-road, gravel and desert conditions.

Not every grade is made for every motorcycle. If you are unsure which one suits how you actually ride, ask us before ordering and we will tell you what Sprint catalogue for your bike.

Built to outlast the service schedule

Polyester is a manmade fibre and, looked after properly, shows no meaningful loss of structure or filtering performance over time. Where a paper element is a consumable you buy again at every service, the CM231P14 is a component you fit once and clean periodically. Over the life of the motorcycle that changes the arithmetic considerably.

The element is manufactured in Italy by Sprint Filter, who supply filters into World Superbike and Grand Prix paddocks. This is the same media technology, in a road-legal replacement size.

Fitment guidance

Sprint catalogue the CM231P14 for:

• Royal Enfield Classic 350 (2022 onwards)
• Royal Enfield Meteor 350 (2021 onwards)
• Royal Enfield Hunter 350 (2022 onwards)
• Royal Enfield Bullet 350 (2023 onwards)
• Royal Enfield Goan Classic 350 (2025 onwards)

It is a drop-in replacement for the factory element and requires no modification to the airbox, no trimming and no additional hardware. If you are unsure whether this is the correct part for your bike or your model year, send us your registration details and we will help you check before you order.

Technical specifications

Brand: Sprint Filter
Part number: CM231P14
Media grade: P14
Material: dry non-woven filtering media
Filtration: down to 14 microns
Airflow: 1,800 l/m²/sec
Servicing: dry, clean with compressed air, no oiling
Country of manufacture: Italy