Radium Engineering .75" Air Filter (18-0042)

A breather filter only works while its element still breathes.

The Radium Engineering 75mm Air Filter is the small breather-style filter Radium uses on vented configurations: paired with the 10AN ORB air filter fitting on atmosphere-vented catch can setups, it lets crankcase pressure escape while keeping dust and debris out. Available here individually as a replacement or for custom vent builds.

What You'll Feel

• Free-flowing venting restored on a breather that has loaded up with grime
• Dirt kept out of the catch can and crankcase on open-vent configurations
• A clean, purposeful look on vented ports

Features

• 75mm breather-style air filter
• Pairs with the Radium 10AN ORB to air filter fitting (20-0050)
• Suitable for atmosphere-vented catch can and breather configurations

The Details

Breather filters live in dirty air by definition, sitting in the engine bay filtering everything the vent line exhales and inhales, and an element that has gone dark with oil mist and dust flows less in both directions. Swapping the element restores the vent path. The usual caveat for open systems carries over from Radium's guidance: vented configurations are for off-road and race use, are not smog legal, and give up the slight crankcase vacuum sealed systems maintain, so this filter belongs on builds that chose the open route deliberately. Sold individually.

Kit Includes

• 1x 75mm air filter (18-0042)

Applications

• Radium vented catch can and breather setups, including the 20-0050 air filter fitting
• Off-road and race use; open systems are not smog legal