Air Cleaner (21+ Size)

New improved air filter for HPI Nitro Star Big Block engines – more power and better protection

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HPI has developed a new, optimized air filter for all Nitro Star Big Block engines, delivering both better performance and longer engine life. With improved airflow and efficient two-stage filtration, your Savage gets significantly better protection against dust, dirt, and debris – without choking engine power.

This air filter is designed specifically for the HPI Savage series and fits perfectly under the roll bar, ensuring it gets fresh air while being well protected in crashes. A clear “must-have” upgrade product for anyone running a Savage XL Nitro SBK or other HPI Nitro Star Big Block models.

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Features and benefits

• Improved air supply = more power

The new design gives the engine a larger and more consistent air intake, which improves combustion and thus engine performance. You get more response, better acceleration, and a more stable engine run.

• Two-stage foam filter for maximum protection

The air filter is built with two different foam layers that work together to protect the engine:

• The outer foam layer captures larger dirt and dust particles and is easy to remove and clean.
• The inner foam layer captures the very fine dust particles and does not need to be cleaned as often, making maintenance easier.

• Large air intake in the center of the filter

The air intake is placed in the middle of the filter cylinder, surrounded by two solid nylon plates at the top and bottom. This means:

• Dust cannot penetrate directly into the intake.
• The engine is effectively protected against harmful debris.
• Air supply remains stable, even during hard driving.

• Robust and dustproof design

The combination of double foam layers and nylon plates makes the filter almost “impenetrable” to dust and dirt, minimizing the risk of engine damage – especially when driving on loose surfaces such as gravel, soil, and dust.

• Optimal placement on Savage

The specially developed brackets ensure that the air filter sits perfectly under the Savage roll bar:

• Good airflow under the body shell.
• Better protection during rollovers and crashes.
• Reduced risk of the filter hitting the body or other parts.

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Compatibility

The air filter is developed for HPI Nitro Star Big Block engines and is ideal for, among others:

• HPI Nitro Star S-25
• HPI Nitro Star 21BB
• Other HPI Nitro Star Big Block engines with corresponding air filter mounting

Fits:- Savage XL Nitro SBK

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Maintenance

• Regularly clean the outer foam layer (e.g. with filter cleaner and air filter oil) to ensure optimal airflow.
• The inner foam layer only needs to be cleaned after extended use or in very dusty conditions.
• Always ensure the filter is properly oiled so it can capture fine dust particles without restricting airflow.

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In short: This HPI air filter is a thoroughly engineered upgrade for anyone who wants more power, better filtration, and longer life from their Nitro Star Big Block engine – especially on the Savage XL Nitro SBK and other Savage models. A small investment that can save you from expensive engine damage.