ITG Air Filters Explained: Maxogen Kits & Profilter Upgrades Guide

October 30, 2026

If you want to extract more power from a tuned engine, increasing airflow is the mandatory first step. Factory intake systems are designed with NVH (Noise, Vibration, and Harshness) in mind, heavily prioritizing a quiet cabin over engine breathing efficiency. As a result, factory paper filters restrict airflow and choke the turbocharger, especially when pushing higher boost pressures.

ITG Filters is a legendary UK based manufacturer specializing in high performance air filters and induction kits for both road and motorsport applications. Operating from their base in Northamptonshire, ITG hand builds every filter to incredibly strict quality standards. Their hardware is trusted globally by professional racing teams across Formula 1, touring cars, and rally, proving their ability to handle demands far higher than any standard OEM filter.

This guide breaks down the technology behind ITG’s signature foam element designs and explains why they consistently outperform conventional paper and cotton gauze filters.

The ITG Advantage: Tri-Foam System

Most aftermarket intake brands rely on pleated cotton gauze. While cotton flows better than OEM paper, it has limitations regarding dust retention and airflow consistency as it gets dirty.

ITG takes a completely different approach with their patented Tri-Foam System. Instead of cotton, ITG uses a bespoke, multi layered reticulated polyurethane foam.

Maximum Airflow: The unique open cell structure of the foam allows a significantly higher volume of air to pass through compared to cotton or paper. This means your turbo can spool faster and hit peak boost with less restriction.
Superior Dust Load Capacity: The Tri-Foam design captures heavy dust on the coarse outer layer while trapping microscopic particles in the finer inner layers. Because the dirt is suspended within the depth of the foam, the filter can hold a massive amount of debris before airflow is actually restricted.
Lifetime Reusability: Unlike factory paper filters that are thrown away at every service, ITG foam filters are fully washable and reusable, making them a cost effective lifelong upgrade.

ITG Profilter Panel Filters (OEM Replacement)

For drivers who want to keep the factory airbox aesthetic while unlocking better performance, the ITG Profilter is the ultimate drop in solution.

These flat panel foam filters are designed to perfectly replace the restrictive factory paper filter inside the OEM housing. By dropping in a Profilter, you immediately reduce the pressure drop across the intake system. This is a highly recommended first modification for lightly tuned cars, like a BMW M240i running an MHD remap, where the stock airbox itself flows well, but the factory paper filter creates a bottleneck.

ITG Maxogen Induction Kits

When pushing Stage 2 power and beyond, the physical volume of the factory airbox becomes the restriction. This is where the ITG Maxogen induction kits come into play.

Maxogen kits completely replace the factory airbox with a massive, free flowing foam cone filter, often paired with mandrel bent aluminum pipework and custom heat shields.

Cold Air Feed: By relocating the filter and utilizing aluminum heat shielding, Maxogen kits prevent the engine from inhaling hot, power robbing air radiating off the engine block.
Unmatched Induction Noise: Removing the baffled factory plastic airbox unleashes the raw sound of the turbocharger spooling and the diverter valve dumping pressure, drastically improving the driving experience.

ITG Platform Spotlights

Find the exact hand built ITG filtration hardware engineered for your specific chassis by linking directly to your filtered category pages:

Ford ST & RS: Maximize the turbo spool on your Fiesta ST (Mk7/Mk8) or Focus RS with full Maxogen induction kits via the links below:

Shop ITG Air Filters & Induction Kits for Ford ST & RS

VAG (VW, Audi, Cupra): Replace the restrictive paper filter on your EA888 engine (Golf GTI/R, Audi S3) for better airflow and throttle response below:

Hyundai N Division: Feed the i20N and i30N cold air with bespoke Maxogen intake kits and heat shields via the links below: