Polini
Polini 45mm Racing Air Filter w/ Intake Cover
Description
Unlock maximum unrestricted airflow and razor-sharp throttle response with the race-bred Polini 45mm Performance Air Filter Assembly. Engineered in Italy, this high-porosity expanded foam element flows significantly more air volume than restrictive factory airboxes, allowing your engine to extract maximum peak horsepower. Equipped with a removable, impact-resistant plastic splash shroud, this kit blocks out harmful tire-flung road spray, dust, and moisture—ensuring consistent, dry airflow whether you are battling track conditions or logging daily urban commutes.
Advanced Induction Features
- High-Flow Foam Element: Maximum filtration with minimal air resistance for improved throttle response and top-end power.
- Removable Splash Cover: Black impact-resistant plastic shield protects against water and road grime — ideal for daily street use. Keep it on in wet conditions to prevent waterlogging.
- 45mm Universal Flange: Fits performance carburetors, including the Polini CP, Dell'Orto PHBG, OKO, and similar 45mm intake bells.
- Fully Washable & Reusable: Clean the foam element regularly for a lifetime of performance.
- Italian Engineering: Authentic Polini craftsmanship, proven on the racetrack and refined for street use.
Comprehensive Carburetor Compatibility Index
This filter features a 45mm (~1.75") internal mounting diameter. It is designed to clamp directly onto performance carburetors utilizing a 45mm outer diameter (OD) intake bell. Review common tuning match-ups below:
| Carburetor Family | Intake Bell Fitment Size | Common Engine Platform Applications |
|---|---|---|
| Polini CP Series | Fits 17.5mm, 19mm, 21mm, and 23mm variants | Minarelli / Jog 50, Genuine Buddy, Vespa 2T tuning builds |
| Dell'Orto PHBG | Direct match for 45mm threaded or smooth bells | High-RPM European 2-stroke performance configurations |
| OKO / PWK (Small Body) | Fits 21mm through 28mm small-body slide variants | Upgraded GY6 50cc, 139QMB, and 2-stroke stroker blocks |
| GY6 Large Performance Carbs | Fits select 30mm+ performance slide upgrade layouts | Big-bore GY6 125cc / 150cc scooter and buggy platforms |
CRITICAL TUNING REQUIREMENT: Increasing your engine's airflow demands a corresponding increase in fuel delivery. When ditching your restrictive factory airbox for this high-flow racing filter, you MUST up-jet your carburetor's main jet to prevent running dangerously lean, which can cause severe overheating or immediate top-end piston seizure.
Technical Specifications
- Internal Flange Connection Diameter: 45mm (~1.75 Inches)
- Flange Style: Straight neck with included heavy-duty steel worm-gear clamp
- Filter Material: High-performance open-cell polyurethane foam
- Shroud Material: Impact-resistant high-gloss black structural plastic
- Manufacturer Part Number (MPN): 203.0097 (2030097)
- Country of Origin: Italy (IT)
Performance Maintenance Tip: For maximum engine protection, thoroughly coat the foam element with a dedicated high-tack foam air filter oil before your first ride. Squeeze out any excess oil—never wring or twist the element, as this can tear the foam cell structure.
About Polini
Polini Motori has been at the forefront of Italian performance engineering since 1945. Every Polini component is developed through rigorous motorsport testing before being made available for street and track use — delivering race-proven performance you can trust.
California Prop 65 Warning: www.p65warnings.ca.gov
Notice: This product is intended for off-road/competition use. Not intended for use on public roads or land.
SKU: 1300-1138
Vendor: Polini
Category: Fuel System & Exhaust / Air Filters
Product Diagrams
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
