The RB N54 External PCV Kit is finally available after over 1 year of usage from dedicated N54 enthusiasts. This product we have found does wonders in eliminating vulnerabilities in the OEM PCV system, beyond that of what only a simple Internal PCV Valve replacement can accomplish.

With high performance always comes finding a systems weak links, and when you combine that with component degradation over the years you often end up with problems. Problems such as oil consumption, smoking out the exhaust, etc.; we have heard it all from all types of customers with a variety of mileage and turbo combinations. We have found this solution in some cases cures these problems, or mitigates them, many of times. What this means is that your OEM PCV system is not up to the task of the performance you are subjecting it to, or the components on your vehicle are less than healthy (ie. Clogged valve cover ports, Hardened/Cracked valve cover gaskets/etc). When using this kit to the full potential you would ideally plug the head ports, which positively rules out vulnerabilities in the valve cover gasket and valve cover itself meaning it is no longer a "worry"; but plugging the head ports is NOT required - but once again we suggest considering it as soon as possible to get the full benefits.

Another big perk of running an external PCV system is that you can finally eliminate the constant "building up" on your intake valves by inserting an Oil Catch Can into the low load system which is now finally possible. Most of the contamination found on intake valves is in fact due to low load oil collections in everyday usage through the Internal PCV valve and into head ports, which builds up as gunk on your intake valves over time. This is best done by adding in your own Oil Catch Can (not included) and you’ll see first hand this accumulation building in your can rather than on your valves, which you will need to drain at a mileage interval.

The RB External PCV kit we consider most applicable towards the dedicated, high performance, and maintenance savvy N54 consumer; and for those looking for the easiest and quickest PCV valve replacements we still highly recommend our original RB PCV Valve (Internal plug and play setup) for your maintenance or high performance needs. The kit comes optioned as an "A" or "C" in effort to minimise excess parts and costs for the consumer as they may have their own methods of handling the install; but our Option "A" is the most comprehensive kit that is recommended.

You may also wish to consider the RB BMW N54 335i Oil Catch Can Struct Bar Mount Bracket to install the oil catch cans.

Option A - With Earls Pro-Lite 350 -6AN (~3.3ft) Hose

• Custom RB Vacuum Reference Throttle Body adaptation assembly
• Custom RB External PCV Valve adaptation (with new PCV Valve and grommet)
• Custom RB Mishimoto bung interface adapters (Qty 2)
• 10-32 Head plugs (Qty 6)
• Constant-Tension Spring-Band Hose Clamps (Qty 4)
• Earls Pro-Lite 350 -6AN (~3.3ft) Hose

Option A - With Gates 4219XL PCV Hose (Recommended)

• Custom RB Vacuum Reference Throttle Body adaptation assembly
• Custom RB External PCV Valve adaptation (with new PCV Valve and grommet)
• Custom RB Mishimoto bung interface adapters (Qty 2)
• 10-32 Head plugs (Qty 6)
• Constant-Tension Spring-Band Hose Clamps (Qty 4)
• Gates 4219XL PCV/EEC (5/16”) Hose

Option B

(Without Hose)

• Custom RB Vacuum Reference Throttle Body adaptation assembly
• Custom RB External PCV Valve adaptation (with new PCV Valve and grommet)
• Custom RB Mishimoto bung interface adapters (Qty 2)
• 10-32 Head plugs (Qty 6)
• Constant-Tension Spring-Band Hose Clamps (Qty 4)

Option C

• Custom RB Vacuum Reference Throttle Body adaptation assembly
• Custom RB External PCV Valve adaptation (with new PCV Valve and grommet)
• 10-32 Head plugs (Qty 6)

This is not compatible with our standard RB PCV Valve and Cap as that is an internal arrangement thus they must be removed in order to run the RB External PCV hardware.

We recommend the usage of Mishimoto Oil Catch Can to be used with this kit. 

Fits all N54 twin turbo engine

• E82/E81 135i
• E90/E91/E92/E93 335i
• E60/E61 535i
• E89 Z4 35i

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 

E-N54-PCV-EXT-A (Option A with Earls Pro-Lite 350 -6AN (~3.3ft) Hose)

E-N54-PCV-EXT-A-Gates (Option A with Gates 4219XL PCV/EEC 5/16” Hose)

E-N54-PCV-EXT-B (Option B)

E-N54-PCV-EXT-C (Option C)

Manufactured by

Rob Beck (RB)