Tracy Lewis Clean Side Separator

Tracy Lewis Clean Side Separator

Keep oil vapor out of your intake and your MAF readings dead accurate — the Tracy Lewis Clean Side Separator is the clean-side solution your catch can setup has been waiting for.

Why It Works

Crankcase blow-by gases carry oil vapor that coats your MAF sensor, gunks up your intake tract, and throws off air-fuel readings over time. The Tracy Lewis Clean Side Separator mounts directly in place of your factory oil fill cap and tackles the problem at the source.

As air moves in and out of the crankcase, the internal filter media captures oil vapor before it ever reaches the intake — then lets it drain right back down into the crankcase where it belongs. Your engine breathes freely, your MAF sees 100% clean, metered air, and your intake tract stays exactly where it should: clean.

What Sets It Apart

• All-billet construction — Machined aluminum body and billet barb fitting, zero plastic anywhere on the unit
• Oversized vents — Larger vent openings than competing designs mean better crankcase airflow, not a bottleneck
• 100% MAF-safe — Every cubic inch of air stays properly metered; no signal contamination, no check-engine headaches
• Oil fill cap replacement — Installs without permanent modifications; drop it in and you're done
• Signature Series matched — Designed to pair directly with Tracy Lewis Signature Series Catch Cans for a complete, cohesive system
• RX-level performance — Internally identical to the legendary RX Clean Side Separator, badged to match the Tracy Lewis Signature Series

If clean crankcase ventilation and intake protection matter to you, this is simply the best drop-in upgrade you can bolt on today.

FAQ

What does the Tracy Lewis Clean Side Separator do?

It replaces the factory oil fill cap and uses internal filter media to capture oil vapor as air moves in and out of the crankcase, helping keep that vapor from reaching the intake.

How does it help protect MAF readings?

By capturing oil vapor before it reaches the intake tract, it helps the MAF see clean, properly metered air and helps prevent signal contamination from oil vapor buildup.

How does the Tracy Lewis Clean Side Separator install?

It mounts directly in place of the factory oil fill cap and installs without permanent modifications.

What is it made from?

It features all-billet construction, including a machined aluminum body and billet barb fitting, with zero plastic anywhere on the unit.

What catch can system is it designed to match?

It is designed to pair directly with Tracy Lewis Signature Series Catch Cans and is badged to match the Tracy Lewis Signature Series.