• 15+ Years of Performance Parts, Tuning & Installation

Denstoj Rocker Retainers for FA/FB Subaru Engine

  • Backed by real installs and tuning experience at FAST of West Chester
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$695.00
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Don’t build a Subaru FA or FB engine without these. Rev with peace of mind!

The Subaru FA & FB engines (eg. FA20 in the Toyota 86) have a fatal flaw. When a valve spring loses pressure, the rocker arm assembly can fall out. If it's picked up by the camshaft, it gets shot out the tappet cover, causing oil to spill onto the exhaust headers, potentially catching fire. 

Now, without the rocker, the valve can drop inside the cylinder and destroy the piston. Yes, sometimes it’s an over rev but it can happen across the rev range even on your daily driver.

So if you drive a Toyota 86, or any Subaru with an FA or FB engine, this IS the most important upgrade you can do to save you an expensive engine rebuild. It’ll give you peace of mind when driving.

YES it's the same on the 2022 GR86 and NO the spring recall has not fixed this.

Why Choose Our Rocker Retainer Kit?

Engine rebuilds can cost thousands of dollars, often ranging between $5,000 to $10,000, depending on the extent of the damage. Parts alone, such as pistons, valves, gaskets, can add up quickly. Our Rocker Retainer Kit, is a fraction of that cost and offers peace of mind by preventing a potential catastrophic failure that could leads to an expensive rebuild. 

Protect your investment and drive with confidence knowing your engine is safeguarded.

  • Earn FAST points on this part!
  • Backed by real-world installs
  • FAST WC Team Approved
Denstoj Rocker Retainers for FA/FB Subaru Engine

$695.00

Why Drivers Choose FAST of West Chester

  • I can't recommend this place enough. Being able to trust a shop in the performance world is big. The 2hr drive to get there, is worth knowing the job will be done right. Very happy to have found this shop, to
    support my builds going forward.

    Donald Wojnar

  • I recently had the pleasure of working with FAST of West Chester for some performance upgrades on my 2022 WRX, and the experience was nothing short of exceptional. I opted for a Borla S-Type exhaust and Cygnus Coilovers, and the team at FAST nailed the installation, fitment, and setup to a T.

    Adam Cranston

  • The team at FAST are excellence in every way. First, I consulted with Dave on mods for my HPDE track car. He listened and advised me on the best parts & mods to achieve my goals. He was patient & gave me space to research the options presented & worked with me through several changes before we built. Second, the build execution was flawless, proper heat shielding, bracing and poly everywhere. All components worked as advertised.

    Bryce Budd

  • This place has been my go to shop for all things Subaru. From simple service to performance parts and tuning, they have been top notch.

    William Brunell

  • Excellent shop. They installed a Cobb Stage 2 DP and Whiteline Sway bars and end links on my 2013 WRX. The work was done right and clean. The estimate was accurate. They were very knowledgeable, friendly and gave me the straight scoop on exactly what I was getting for the money
    and what I needed to get where I want to be with it. I'd recommend them
    to any car enthusiast.

    Devin Greco

Does it come with a warranty?

Most products we carry include a manufacturer warranty. Since we work with top performance brands, warranty coverage can vary by product. If you have questions about a specific item, reach out — we’re happy to help.

Do you offer installation help or advice?

Yes — we don’t just sell parts, we install and tune them too. FAST of West Chester is a real performance shop, and we’ve worked hands-on with many of the products we carry. If you have questions about fitment, installs, or building your setup, our team can point you in the right direction.

How fast is shipping?

Many of our products ship the same day or next business day, depending on availability. We work hard to get parts out fast so you can get your build moving without delays.

What’s your return policy?

Returns for exchange or refund are accepted within 30 days of receiving your order. Items must be in new, unused condition and in original packaging. If you have any questions, our team will help make the process easy.

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