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- Emissions System
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This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
Modern day emissions regulations require the use of a closed crankcase ventilation (PCV) system to recirculate combustion blow-by gases from the crankcase back in to the intake to be burned. Unfortunately, these blow by gases contain water vapor (which is a byproduct of combustion) and pick up oil mist from and the windage cloud and cam lubrication system as they travel through the crank case. Due to less than 100% effective air/oil separation in the stock PCV system, some oil mist and water vapor gets carried back to the intake tract and over time cause oil deposits in the intake manifold, intake ports, and on the back of intake valves. All will eventually lead to poor performance and reduced fuel economy, and the presence of this oil mist in the intake charge may even increase the risk of engine-damaging detonation.
With forced induction, track use, and/or extended high RPM usage, these symptoms increase as the factory PCV system is overwhelmed, and a catch can becomes a must for your E46 M3. This kit is a direct fit making this an easy reversal if desired as well as maintaining a clean appearance by utilizing the open "smuggler's compartment" on the passenger side of the engine bay.
*Click here for catch can instructions*
Features:
This product was last offered at the strikethrough price on
11-07-2026
This product was last offered at the strikethrough price on
11-07-2026
When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem.
The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking.