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REVOLUTION Big Cooling Diff Cover for Mazda RX8 (Series 1, 2003-2008)

Finned Series 1 differential cover adds 750cc oil capacity and rigidity, helping RX8 owners manage differential heat during sustained hard use.

Mazda RX8 diff cover upright, showing deep cooling fins and blue drain plug

$690

Mazda RX8 diff cover from REVOLUTION improves oil management and housing support for Series 1 cars. This finned, high-rigidity cover adds 750cc capacity for drivers using their RX8 hard. The REVOLUTION RX8 diff cover supports a more considered rear driveline setup. It combines increased oil volume, external finning and a thicker cover construction in one component. It suits owners seeking these changes at the differential itself.

Mazda RX8 Diff Cover Features

  • 750cc additional capacity increases differential oil volume to support heat management during sustained use. The added volume is incorporated into the cover.
  • Large external fins increase surface area to support improved heat dissipation from the differential oil.
  • An average thickness of 5-10mm, versus 3mm OEM, provides greater housing rigidity at the differential cover.
  • Upgraded bolts act as knock pins for secure cover location, helping maintain side-bearing preload and gear contact.
  • Finally, the integrated service hole allows an external oil cooler to be installed if required.

For rotary enthusiasts, this Series 1 RX8 diff cover is suited to repeated spirited use. The Mazda RX8 diff cover provides extra oil volume and a more rigid housing arrangement without changing the rest of the differential package. Its thicker construction and upgraded bolt arrangement focus on cover support and location. The service hole retains a defined option for an external cooler when required.

Pair it with the CUSCO Strut Brace Type OS (Front) when planning a broader chassis-support package. Visit REVOLUTION for manufacturer information on its Japanese performance parts range.

Additional information

RX8 Model

SKU RV-DCF-S1 Categories , , Types , , Brand:

Related RX8 Upgrades

This cooling diff cover is one of the best Mazda RX-8 upgrades you can make to your Series 1 (2003-2008). Differential cooling mods are among the top Aftermarket mods you can buy from REVOLUTION for owners who want better performance and reliability from their RX8. If you are looking for rx8 diff cover for sale in Brisbane (QLD), Sydney (NSW), Melbourne (VIC), Canberra (ACT), Adelaide (SA), Darwin (NT) or Perth (WA), you’ll find high-quality Japanese Bracing upgrades at RX8 Upgrades.

Frequently Asked Questions

Will the REVOLUTION Big Cooling Diff Cover fit my Series 1 RX8?

The REVOLUTION Big Cooling Diff Cover is listed for Mazda RX8 Series 1 models from 2003 to 2008.

How much extra differential oil does this RX8 diff cover hold?

The REVOLUTION RX8 diff cover adds 750cc of oil capacity, increasing the differential oil volume to support heat management during sustained use.

How does the REVOLUTION diff cover help control differential temperatures?

The REVOLUTION Big Cooling Diff Cover uses large external fins to increase surface area for heat dissipation. Its additional 750cc oil capacity also supports more stable oil temperatures during hard or sustained driving.

Is this diff cover stronger than the OEM RX8 cover?

The REVOLUTION RX8 diff cover has an average cover thickness of 5-10mm, compared with 3mm for the OEM cover. This added material is intended to provide greater rigidity where the cover supports the differential assembly.

What do the upgraded bolts do on the REVOLUTION RX8 diff cover?

The upgraded bolts on the REVOLUTION RX8 diff cover act as knock pins to locate the cover securely. This helps maintain side bearing preload and gear contact.

Can I fit an external differential oil cooler with this cover?

The REVOLUTION Big Cooling Diff Cover includes a service hole that allows an external oil cooler to be installed if your rear driveline package requires one.