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RX8 OEM Aftermarket Parts: Upgrades, Replacements and Performance Options

RX8 OEM aftermarket parts are the non-genuine replacements and performance upgrades Mazda RX8 owners reach for when they want reliable, purpose-built alternatives to stock components. Whether you are refreshing a worn component or building toward a specific performance goal, this range gives you considered options across cooling, drivetrain, handling and more.

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$ 20 — $ 13000

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GREDDY TRUST Comfort Sports GT Slash Exhaust System for Mazda RX8 (Series 1, 2003-2008)

Stainless cat-back exhaust made in Japan, tuned to 92dB for a genuine sporting note with minimal cabin drone on the daily commute or back-road run.

$1,800

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BRIDE Zeta IV Low Max Fixed-Back Bucket Seats (Red) inc Rails & Airbag Adapter for Mazda RX8 (Series 1 & 2, 2003-2012)

Genuine BRIDE Zeta IV Low Max bucket seat in red, with RX8-specific rails and airbag adapters included for a complete cabin conversion.

$3,940

BRIDE Zeta IV Low Max Fixed-Back Bucket Seats (Black) inc Rails & Airbag Adapter for Mazda RX8 (Series 1 & 2, 2003-2012)

Complete RX8 bucket seat rails package with genuine BRIDE Zeta IV Low Max shell and airbag adapter. Drops the driver lower, locks them in, and installs without a dashboard warning light.

$3,940

AUTOEXE x KOYORAD High-Capacity 48mm Aluminium Radiator for Mazda RX8 (Series 2, 2009-2012)

Swap the ageing OEM unit for a 48mm aluminium core that pulls heat from the Renesis significantly faster, with a direct factory-fit drop-in for Series 2.

$950 inc GST

GP SPORT Exas High-flow Power Catalyser for Mazda RX8 (Series 1 & 2, 2003-2012)

Swap the restrictive factory cat for a freer-flowing performance catalytic converter that retains emissions equipment across the full 2003-2012 RX8 range.

$1,650 inc GST

Mazda RX8 licence plate bolts with black APEXi caps and hex key

APEXi Licence Plate Bolt Set (4pc) for Mazda RX8 (Series 1 & 2, 2003-2012)

Replace mismatched fasteners with matching red heads and stainless collars for a neater exterior finish. A four-piece set covering both RX8 generations.

$30

Four black Mazda RX8 racing lug nuts, including one shown with internal thread

APEXi Racing Wheel Lug Nut Full Set (20) for Mazda RX8 (Series 1 & 2, 2003-2012)

Uniform, purpose-made wheel hardware in a full 20-piece M12 x 1.5 set. SCM435 chromoly construction and a 40mm shank length suit both OEM and aftermarket RX8 wheels in black or bronze.

$150

Red Mazda RX8 brake fluid cap with AutoExe logo shown from above

AUTOEXE Brake Fluid Cap for Mazda RX8 (Series 1 & 2, 2003-2012)

Swap the factory plastic brake reservoir cap for a red anodised aluminium piece that adds a deliberate colour accent to an often-overlooked engine-bay detail.

$80

Mazda RX8 shift knob with AutoExe badge, black leather and carbon-look base

AUTOEXE Nappa Leather Gearknob (Round Shape, Black Stitch) for Mazda RX8 (Series 1 & 2, 2003-2012)

Upgrade your Mazda RX8 shift knob to Nappa leather with adjustable height and black stitching for a more refined, tailored manual driving feel.

$180

RX8 leather gearknob front view showing red stitching and AutoExe top badge

AUTOEXE Nappa Leather Gearknob (Round Shape, Red Stitch) for Mazda RX8 (Series 1 & 2, 2003-2012)

Nappa leather and red stitching transform the most-touched cabin control on every drive. Adjustable height lets you dial in exactly the right hand position.

$180

Two red RX8 screw type oil caps showing top logo and threaded underside

AUTOEXE Oil Filler Cap (Screw Type) for Mazda RX8 (Series 1, 2003-2008)

Machined red anodised aluminium cap lifts the most-handled service point on a Series 1 engine bay from functional to finished.

$60

RX8 twist oil cap shown open beside its red anodised sealing section

AUTOEXE Oil Filler Cap (Twist Type) for Mazda RX8 (Series 2, 2009-2012)

Red anodised aluminium twist oil cap built for Series 2 filler points, adding a machined, purposeful look to a regularly handled engine-bay detail.

$60

Close-up of grey RX8 rear side cowl installed ahead of rear wheel

AUTOEXE Rear Side Cowl Set for Mazda RX8 (Series 2, 2009-2012)

Adds colour-matched definition behind the rear doors, refining the Series 2 side profile with a clean, factory-sympathetic finish.

$600

RX8 passenger footrest plate shown loose with circular grip holes and silver finish

CAR SHOP GLOW Passenger Footrest Plate (Aluminium) for Mazda RX8 (Series 1 & 2, 2003-2012)

Solid 3mm aluminium footrest plate with anodised sandblasted finish upgrades the passenger footwell with a purposeful metal accent in four colour options.

Price range: $259 through $309

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RX8 carbon footrest plate shown loose with three raised traction strips

CAR SHOP GLOW Passenger Footrest Plate (Carbon) for Mazda RX8 (Series 1 & 2, 2003-2012)

Adds a dedicated foot support surface to the passenger footwell, finished in 2mm carbon for a clean, coordinated cabin upgrade.

$309

Two angled white RX8 80W-140 gear oil bottles with FORTEC Racing Gear labels

FORTEC Full Synthetic Differential Oil SAE 80W-140 GL-5 (2 x 1L Bottles) for Mazda RX8 (Series 1 & 2, 2003-2012)

Full synthetic GL-5 lubricant in the correct 80W-140 grade for RX8 rear differential servicing. Two 1-litre bottles supply the full service quantity.

$100

Mazda RX8 gearbox oil in two FORTEC Spec R 75W-90 bottles

FORTEC Full Synthetic Gearbox Oil Spec R SAE 75W-90 GL-5 (2 x 1L Bottles) for Mazda RX8 (Series 1 & 2, 2003-2012)

Fresh Mazda RX8 gearbox oil in a two-litre service pack. Full synthetic 75W-90 GL-5 formula for smooth shifts and lasting gearbox protection.

$100

RX8 carbon side mirrors installed on white door, showing driver-side housing detail

GANADOR Aero Side Mirrors for Mazda RX8 (Series 1 & 2, 2003-2012)

Carbon housings and blue 600R wide-angle glass sharpen the RX8 door line while broadening rearward vision beyond flat OEM glass.

Price range: $1,100 through $1,600

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Mazda RX8 valve caps in two HASEPRO retail packs

HASEPRO Air Valve Cap and Stem Cover Set (Black, 4pc) for Mazda RX8 (Series 1 & 2, 2003-2012)

Swap tired valve hardware for black anodised aluminium caps with carbon fibre detailing. A neat finishing touch for any RX8 wheel.

$20

Mazda RX8 oil additive HKS ADD-II 200ml silver can with black cap

HKS ADD-II Engine Oil Additive 200ml for Mazda RX8 (Series 1 & 2, 2003-2012)

Organic molybdenum treatment that reduces friction and targets dry-start wear in the Renesis rotary. A considered addition to any RX8 oil service.

$45

What owners are saying

CAR SHOP GLOW Passenger Footrest Plate (Aluminium) for Mazda RX8 (Series 1 & 2, 2003-2012) CAR SHOP GLOW Passenger Footrest Plate (Aluminium) for Mazda RX8 (Series 1 & 2, 2003-2012)

Well I broke down and bought this since I didn't want the girlfriend putting her feet up on the dash on long trips or when she can't sit still. This is still set up for the RHD cars, but with a little rigging you can get it to work. It took me about an hour to put in the illuminated shifter, and about 3 hours to figure this out and put it in place. I had to replace the bolts it came with sheet metal screws and a few lock washers, but its in. Its actually pretty comfortable, and I just hope it helps keep the feet off the dash.

GREDDY TRUST Aluminium Racing Radiator TW-R for Mazda RX8 (Series 1, 2003-2008) GREDDY TRUST Aluminium Racing Radiator TW-R for Mazda RX8 (Series 1, 2003-2008)

Huge shout out to RX8 Upgrades for all the bling bits he's supplied so far for my series 1 Steering wheel , GReddy Radiator , Odula intake , Extractors , OMP sheild , Brass gear stick bush , Alternator , GReddy pulley set , New gear stick boot , Magnetic sump plug with a lot more to come ! One of the nicest guys to deal with as well for parts and knowledge on Mazdas is next level !

RX8 OEM aftermarket parts are the non-genuine replacements and upgrades built to a documented application, chosen by owners who want a reliable alternative without compromising on fit or purpose. Therefore, consider where each part sits in your build and what standard you want the car to meet.

This collection spans straightforward replacements for worn components through to purposeful upgrades. For example, these improve response, cooling, control and everyday drivability. Every part listed here has a documented application. Also, check individual product compatibility before ordering, particularly if your car has already been modified.

Mazda RX8 aftermarket parts for every stage of ownership

Owners searching for RX8 aftermarket parts Australia-wide will find a specialist catalogue here, not a general-purpose parts site. That distinction matters. For example, the rotary engine has specific demands around cooling, oil management and airflow. A generic catalogue does not account for those demands. Therefore, the options in this range are selected with those requirements in mind.

What this range covers

  • Maintenance and replacement: A new aftermarket component fitted to a known specification is more dependable than a used genuine part. Moreover, an unknown service history adds risk across cooling hoses, filters, sensors and seals.
  • Mazda RX8 upgrade parts: Where a stock component is functional but limiting, an upgrade part helps. For example, it can improve throttle response, reduce heat soak or tighten handling consistency. Therefore, target the area that matters most to how you drive.
  • RX8 performance parts work best as part of a coherent plan. For instance, an intake upgrade pairs naturally with an exhaust improvement. Similarly, a handling change often calls for complementary tyre and alignment work. Think in systems, not individual items.
  • Fitment confidence: Always confirm the stated application and series compatibility before purchase. In addition, fitment details are listed per product and are the reliable reference point.

Aftermarket versus genuine: choosing the right approach

The decision between genuine and aftermarket components is not always straightforward. Genuine Mazda parts remain the factory-correct choice where original calibration and fit are non-negotiable. In addition, for some safety-critical or emissions-related components, that is clearly the right call.

However, for the broader range of RX8 OEM aftermarket parts, a quality aftermarket alternative can match or exceed the original. This applies particularly to performance, cooling, suspension and interior upgrades.

Finally, browse with a clear idea of the job each component needs to do. Select on documented purpose, confirmed fitment and how each part contributes to your build. As a result, the right RX8 OEM aftermarket parts keep your car consistent, whether as reliable daily transport, a refined weekend driver or a car built to perform.

Frequently Asked Questions

What is the difference between genuine Mazda parts and aftermarket parts for the RX8?

Genuine Mazda parts are factory-original components made to the exact specification the car was built with, which matters where precise calibration or OEM fit is critical. Aftermarket parts are non-genuine alternatives that may suit owners seeking a specific replacement solution, a performance upgrade, or a component that better fits their build direction. The right choice depends on the part's role and your priorities for the car.

Are aftermarket parts suitable for a standard RX8 that just needs a repair?

Yes, many aftermarket parts are a practical choice for straightforward repairs or component replacement on an otherwise standard RX8. Choosing a quality new aftermarket part avoids the uncertainty of fitting a used component with an unknown service history. Always check the individual product's stated compatibility before ordering.

How do I know if an aftermarket part will fit my RX8?

Check the fitment and compatibility information listed on each individual product page before purchasing. The RX8 was produced in two series with some differences between them, so confirming your car's series and build details is important. If you are unsure, the product description will specify which variants or model years the part suits.

Can aftermarket parts be used as part of a performance build on an RX8?

Aftermarket parts are commonly used in performance-focused RX8 builds to refine specific areas such as response, cooling, control or power delivery. The key is selecting components that work together as part of a considered plan rather than fitting them in isolation. Review each part's intended application and how it interacts with the rest of your setup.

Is it safe to use aftermarket parts on a rotary engine like the RX8?

Rotary engines have specific operating characteristics that make part selection particularly important, and quality aftermarket components from reputable manufacturers are widely used on RX8s without issue. The critical step is ensuring the part is appropriate for its intended application and compatible with your car's current state of tune or modification. Always review individual product specifications and, where relevant, consult a specialist familiar with rotary engines.

Do aftermarket parts void my RX8's warranty?

Warranty implications depend on the age of your vehicle, the nature of the warranty in question, and Australian consumer law as it applies to your situation. Most RX8s in circulation are well beyond their original manufacturer warranty period. For any vehicle still under a dealer or extended warranty, it is worth confirming with that provider before fitting non-genuine components.

Are RX8 aftermarket parts available for both Series 1 and Series 2 models?

Availability varies by part and category. Some aftermarket components are compatible across both RX8 series, while others are specific to Series 1 or Series 2 due to differences in engine management, body panels or other specifications. Each product listing will state which series or model years it suits, so always verify fitment before ordering.