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Denstoj Rocker Retainers – Subaru FA / FB Engines (Toyota 86 / GR86 / Subaru BRZ / WRX)
Denstoj

Denstoj Rocker Retainers – Subaru FA / FB Engines (Toyota 86 / GR86 / Subaru BRZ / WRX)

SKU: RR-FAFB
$879 AUD · Insured freight · Special order · usually dispatched within 5–14 business days
Not sure it fits your car? Call +61 461 324 537

Fits: Subaru FA and FB engines, including the Toyota 86 / GT86 (ZN6), Subaru BRZ (ZC6 and ZD8), Toyota GR86 (ZN8), Scion FR-S and Subaru WRX (FA20DIT / FA24DIT). Not for the Toyota GR Yaris / GR Corolla (G16E). See the Denstoj G16E kits for those.

The FA and FB engines have a known weak point. If a valve spring loses pressure, through an over-rev or even in normal driving, a rocker arm can drop out. The cam can then throw it through the tappet cover and dump oil onto the exhaust, and the valve can drop into the cylinder and destroy the piston.

The Denstoj rocker retainer kit holds the rocker arms in place so this can't happen. It's one of the most important upgrades for any FA/FB engine, stock or built, and a fraction of the cost of a rebuild. This still applies to the 2022+ GR86 / BRZ, and the factory valve spring recall doesn't fix it.

Brand Denstoj
Part number RR-FAFB
Suits Subaru FA20 / FA24 / FB engines

Installation: fitted with the camshafts out. Best done during a head build, cam or spring upgrade.

Usually dispatched within 5-14 business days. Fitment advice available. Contact us before ordering.

FAQ

Do I need these on a stock engine?
They're recommended on any FA/FB engine. Rocker arms can drop out across the rev range, not only on an over-rev.

Does the valve spring recall fix this?
No. The recall doesn't stop the rocker arms dropping out.

Do they work with aftermarket cams and springs?
Yes. They're commonly fitted alongside upgraded cams and springs during a head build.

Do they fit the GR86 / new BRZ (FA24)?
Yes. The FA24 uses the same rocker design.

Real-World Tested · Developed On Street And Track
12 Month Warranty · Insured Freight, Worldwide Shipping
Fitment Guarantee · We Confirm Fit Before You Buy
Shipping (Australia & international)
Items marked In stock are usually dispatched within 1–2 business days. Special order items (ordered in from our supplier for you) are usually dispatched within 5–14 business days. We'll email you a confirmed dispatch date within 24 hours of ordering. Australia (flat rate, tracked, shown at checkout before you pay): parts, axles and single turbochargers $22.99–$40, Kelford Cams parts $22.99–$89, cat-back exhausts $99, turbo kits $237, Turbo Stage 1 & 2 packages $277, transmissions from $334 and engines from $366. New Zealand: small parts $49, mid-size parts and axles $99, cat-back exhausts $179, turbochargers $185 and engine short blocks $399. Other countries (tracked): general parts and axles $150 (axles to the UK $537 by DHL Express), BMW parts $149.99 to North America and $249.99 elsewhere, turbochargers $275 to the US, Canada and China and $470 elsewhere. Turbo kits and Stage 1 & 2 packages ship with DHL Express, priced at checkout. Engines, short blocks and transmissions going overseas are quoted after you order. Shipping prices here are in AUD; checkout shows them in your currency. International orders don't include Australian GST. Import duties and taxes are paid by the buyer: for New Zealand, orders over NZ$1000 are charged 15% GST plus any duty and customs fees by NZ Customs before delivery. Want an exact price first? Use the quote request below.
Fitment guarantee
Send us your VIN or your car's model, year and engine before you order and we'll confirm the part fits. If we confirm it fits and it doesn't, we'll take it back at no cost to you – even on special order items. Email sales@boostedengineering.com.au or use the contact page.
Returns
Changed your mind? In-stock items can be returned within 30 days of delivery if they're unopened, not test fitted and in their original packaging. Choose a refund to your original payment method (20% return fee, plus 3% for PayPal or 6% for Afterpay/Zip) or 100% store credit with no fee. Special order and built-to-order items can't be returned for change of mind once dispatched. Cancelling one before dispatch has a 20% restocking fee, or you can take 100% store credit. Fitment guarantee: if we confirmed fitment before you ordered and the part doesn't fit, we take it back at no cost to you. Contact us first for a return (RMA) number. Return shipping is paid by you and original shipping isn't refunded, except under the fitment guarantee. Faulty, damaged or incorrect items are covered by our warranty and the Australian Consumer Law at no cost to you. Report shipping damage within 48 hours of delivery. Full details: returns and refund policy.
Warranty
12 month warranty on everything we sell – our own Boosted Engineering parts and the brands we stock. If something is wrong with your part, contact us and we will look after you.
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Stage packages for your car

Every part for each stage in one cart, for less than buying them separately.Tap a stage to see exactly what is included.

Toyota 86 / Subaru BRZ (FA20)

Stage 1 Turbo Kit + Clutch $8,643Save $455 Stage 2 Turbo Kit + Clutch & Flywheel + Fuel System + Axles $11,492Save $605 Stage 3 Turbo Kit, Fuel, Clutch, Axles, Forged Short Block $20,583Save $1,084 Stage 4 Turbo Kit, Fuel, Twin Disc Clutch, Axles, Forged Long Block $25,333Save $1,334

Toyota GR86 / Subaru BRZ (FA24)

Stage 1 Turbo Kit + Fuel System + Clutch & Flywheel $9,599Save $998 Stage 2 Turbo Kit + Fuel System + Clutch & Flywheel + Axles $12,379 Stage 3 Turbo Kit + Fuel + Twin Disc Clutch & Flywheel + Axles + Forged Short Block $21,319Save $209

Not sure which stage suits your build? Email sales@boostedengineering.com.auAll packages

Customer reviews

What our customers say

Real feedback from real builds
Boosted Engineering’s turbo kits are next level! The craftsmanship, design and attention to detail are outstanding. From the quality of the welds to the overall fit and finish, everything is exceptionally well engineered. Easily some of the best turbo kits on the market!
Oliver
Best place for getting your ride tuned. Very helpful and professional will be going back after doing some upgrades down the track
Tim
I’m so thankful for the quality work performed on my M2, Ben’s workmanship has been like no other. If you need a turbo kit Boosted Engineering has you covered!
Nick · BMW M2

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