SP63 Valve Cover Breather For Mazda Gen 2 - SPEED PERF6RMANC3

SP63 Valve Cover Breather For Mazda Gen 2

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SP63 Valve Cover Breather For Mazda Gen 2

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Product Description

The stock positive crankcase ventilation (PCV) system on the MZR is known to be problematic even on bone stock cars. Excessive crankcase pressure has been proven to be the #1 cause of the stock turbo beginning to smoke. On higher horsepower cars pushing 25psi or more, the dipstick will push out in order to relieve this pressure which leaves you with oil splattered all over your engine bay. Most oil catch can kits include a check valve to prevent boost from entering the crankcase but this still leaves the problem of a proper exit for all that remaining pressure.


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This valve cover breather screws directly in place of the stock oil cap and provides plenty of relief for all that excessive crankcase pressure. It has an integrated baffle and check ball which prevents unmetered air from entering the crankcase at idle.

NOTE: Currently this product is only available to cars which utilize the second generation (genpu) valve cover. A solution for the first generation valve cover will be available soon. This product is not meant to cure problems from worn piston rings or un-sealing valves resulting in excessive crankcase pressure. If your vehicle is experiencing excessive blow-by, you will see oil come out of this filter which indicates a problem. Please do a compression/leak-down test prior to installing this product to ensure your motor is healthy.

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Product Reviews

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  1. Turbo seal saver 5 Star Review

    Posted by on 28th Sep 2014

    This oil breather cap is a turbo seal saver!...In my case it relieves crankcase pressure enough to let the oil coming from my turbo to drain back into the oil pan without coming past the turbo seals! And looks great under the hood! Worth every penny!

  2. Good option 5 Star Review

    Posted by on 3rd Apr 2014

    This is the easiest way to alleviate crankcase pressure without allowing unmetered air in. I'm hoping this will reduce the oil residue in my intake.

  3. Mazdaspeed 3 Gen 2 Valve Cover Breather 5 Star Review

    Posted by on 31st Mar 2014

    A super quality made piece for sure. I would recommend using a zip tie or in my case I used 2 to make sure your filter stays onto the assembly itself. Super fast shipping as well!

  4. F*** the forums! 5 Star Review

    Posted by on 7th Mar 2014

    This product is bashed in the forums for being "too expensive"; I have to be honest, if you like good under the hood ornaments with an extremely presentable look........this thing does it. The quality is unsurpassed!! Don't go try to "Home Depot" this thing. Dipstick stays put, oil doesn't leak, hood closes, locks in tight, and extremely SEXY!

  5. good solution for crankcase pressure 5 Star Review

    Posted by on 28th Jan 2014

    Had my dipstick popping out at 26 psi and once i put this on the problem was fixed an no more oil everywhere.

Previous | Showing reviews 11-15 of 15