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SP63 Valve Cover Breather For Mazda Gen 2


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.


Check out our video under product videos!

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.

Product Videos



Product Reviews

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Showing reviews 1-10 of 14 | Next

  1. great product!

    Posted by reyesc24@yahoo.com on 2nd May 2017

    Great cap to help with the crank case pressure and help the oil to essentially "breathe"

  2. Great Product!

    Posted by Mat on 7th Jun 2016

    Fit perfectly, and looks amazing! Engine seems to sound quieter as weird as it sounds and it feels like the acceleration is smoother. Went with A BNR S4 so it's not knowing there is the pressure in the crank case! Only thing is I wish the breather came with a clamp to hold it in place better, maybe a black one so it looks nice and sleek.

  3. awesome product

    Posted by Arnold on 1st May 2016

    Since I install this the first thing ive notice was my engine got quieter
    Smooth acceleration..since im goin for big turbo this will help alot from building crank pressure

  4. Excellent product, easy install, and a lot of complimants

    Posted by Alaskazero on 16th Dec 2015

    Besides paying for next day air shipping to Alaska, and getting the product a week and a half later, I was very please with the engineering design that went behind this product. Great fitment, straight forward installation & tons of compliments as well. Thanks for the great product speed performance!

  5. Always a good Experience with SP63!!!

    Posted by Justin Bray on 11th Oct 2015

    Fast Shipping, Great experience as always, second to none.
    Thanks guys for everything, your the best!!

  6. Well designed, fuctional product

    Posted by Mike on 1st Oct 2015

    Everything I've come to expect from SP63 when it comes to quality and attention to detail.

  7. Awesome Product!

    Posted by Dustin on 6th Jul 2015

    Great quality product that has a function as well as adds some style under the hood. Very satisfied and shipping was very fast!

  8. Beautiful, functional and bling!

    Posted by Unknown on 18th Nov 2014

    Delivery was super fast and packaged well. On first impressions this piece is excellent quality and a simple way to brighten the bay. I didn't have vent issues before but feel confident I won't in the future as psi increases.

  9. Nice quality

    Posted by Kevin Z on 26th Oct 2014

    This breather is very nicely made. Great addition to the engine bay also.

  10. Turbo seal saver

    Posted by Unknown 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!

Showing reviews 1-10 of 14 | Next