Radium Fluid Lock Crankcase Catch Can Kit - Ford Focus ST LZ 2015-2018

Radium Fluid Lock Crankcase Catch Can Kit - Ford Focus ST LZ (2015-2018)

Suits:

• 2015-2018 Ford Focus ST — LZ (EcoBoost)

⚠️ Important: Focus ST installations require the Radium 20-0356 Sound Symposer Delete Kit (or equivalent) to be installed before fitting this catch can.

The Radium Engineering Fluid Lock Crankcase Catch Can Kit addresses the crankcase vent side of the crankcase ventilation system on the Ford Focus ST LZ. The PCV and crankcase side catch cans function completely independently of each other and are sold individually or together.

This is a closed loop system — it does not vent to atmosphere (VTA), making it emissions compliant and track legal. The catch can features large 10AN ORB ports, a 4AN ORB drain port, 2-step oil separation baffling, and an O-ring sealed dipstick for easy fluid inspection. Mounts on the rear LH side of the engine bay using factory holes with no cutting, drilling, or permanent modifications required.

Note: The Focus RS uses a different kit (20-0316-FL) due to subtle engine bay differences requiring a different mounting bracket design.

Crankcase Catch Can - How It Works

Runs inline with the crankcase breather port. At low loads it experiences atmospheric pressure, but at high load (WOT) it captures high crankcase blow-by flow that would otherwise accumulate as oil and sludge in the intake pipe and intercooler — reducing thermal efficiency and performance over time.

Kit Includes

• Anodised oil catch can with integrated condenser and dipstick
• Anodised laser-cut Focus ST specific mounting bracket
• Anodised aluminium AN adapter fittings and hose ends
• PCV hose for custom applications
• Stainless steel mounting hardware

Part Numbers:

• 20-0357-FL — Radium Fluid Lock Crankcase Catch Can Kit (Ford Focus ST LZ 2015-2018)
• 20-0356 — Radium Sound Symposer Delete Kit (required, sold separately)
• 20-0316-FL — Crankcase Catch Can Kit for Focus RS (sold separately)

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ CNC-machined billet aluminium components built for performance and longevity
• ✅ Trusted by high-power build tuners and race teams worldwide
• ✅ Bolt-on fitment — no cutting, drilling, or fabrication required
• ✅ Closed loop design — emissions compliant, track legal, and compatible with E85 and flex fuel builds