Denstoj Rocker Retainer Kit for FA and FB Subaru/Toyota Engine

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  • Regular price $899.00
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Don’t build a Subaru FA or FB engine without these. Rev with peace of mind!

Fits both the old and current model BRZ and 86.

Are you sick of your 86, BRZ or FR-S engine blowing up? 

We are!

It took three blown engines before realising it wasn’t a coincidence.

We have discovered that the FA & FB engines have a flaw in the valve rocker design. The rocker arm can separate from the valve assembly after a valve sticks or bounces. Once this occurs the separated rocker arm becomes a projectile inside the engine. 

As soon as the rocker finds a camshaft lobe there is a seriously high chance (note, almost certain) that it will be blown through the engine. So we created a fix by retaining the rocker arms with a clip.

This is a MUST for any Toyota 86 or any Subaru with a third-gen FA or FB engine.

We have worked with an engine performance machine shop with 25 years+ of experience manufacturing valvetrain gear to develop bespoke drop-in pivots.


16x Denstoj Bespoke Drop-in Pivots
16x Denstoj Bespoke Pivot Spring Retainers.


Engine: All third generation Subaru FA and FB (eg. FA20, FA24, FB20, FB25)
- Note: The Subaru FA20 is also known as Toyota 4U-GSE in the Toyota 86

Our bespoke pivot (engine camshaft follower) replaces:

Part Number: 13296AA100
Supersessions: 13296AA040; 13296AA050; 13296AA051; 13296AA090

Which fits the following vehicles

  • Subaru Ascent 2019-22
  • Subaru BRZ 2013-23+
  • Subaru Crosstrek 2013-23
  • Subaru Forester 2011-22
  • Subaru Impreza 2012-23
  • Subaru Legacy 2013-23
  • Subaru Outback 2013-23
  • Subaru WRX 2015-22

Part Number: SU00306140
Supersession(s): SU003-06140; SU00300283; SU00304520

Which fits the following vehicles:

  • Scion FR-S 2013-16
  • Toyota 86 2012-21
  • Toyota GR 86 2022-23+

Although they are OEM drop-in, whenever valavetrain work is being done, clearances must be set for your specific engine with our custom pivots.

We are the original designers of this rocker retainer system and have been manufacturing them since 2019. We have been informed of inferior copies on the market. If you find any, please email us. 

Who's running Rocker Retainers?

Our kits are now installed in 100's of vehicles. See how people like you have improved the reliability of their engines with our Rocker Retainer Kit here.

Testimonial 1


Testimonial 2



Fitting Instructions

See this page on our website here.

Please note. Install at your own risk. Clips must be installed correctly as to not place any load on the clip except under preventative circumstances where the rockers are unloaded.

Want the installation done for you?

Get the experts who designed the Rocker Retainer Kit to install it for you. All you have to do is drop your car or engine off!

For full details see Install FA & FB Denstoj Rocker Retainer Kit in Toyota 86/Subaru BRZ

Are you an engine builder?

If you're an engine builder or you would like to stock our kits, please email

Do you ship to the United States?

Yes! We ship worldwide. Please see Shipping for full details.


Please see the Frequently Asked Questions (FAQ) page.

Customer Reviews

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