Reinforced urethane mounts that eliminate diff movement under load, sharpening rear-end feel and reducing axle tramp on corner exits.
$250
Polyurethane RX8 differential mounts replace the factory rubber bushes at the differential mounting points. The OEM rubber softens with age and heat, allowing the differential to shift under braking, acceleration and cornering loads.
The result is axle tramp on corner exits, a vague rear drivetrain feel, and a rear end that can feel unsettled over mid-corner bumps. These ODULA mounts remove that movement at the source, giving the diff a firm, consistent location.
For RX8 enthusiasts building a more responsive chassis, the shift in rear-end cohesion after fitting urethane diff mounts is immediately noticeable. The car responds more predictably on corner exits and feels less nervous mid-corner.
The drivetrain behaves like a single unit rather than a collection of parts with play between them. That cohesion makes every subsequent suspension and bracing upgrade work more effectively, and it sharpens rear-end composure under braking.
With the differential properly located, the logical next step is front chassis structure. The CUSCO Strut Brace Type OS (Front) with Brake Cylinder Stopper addresses the front upper structure for sharper turn-in. The AUTOEXE Lower Arm Bar (Front) adds front lower rigidity to complete the pairing. Owners driving hard should also consider the REVOLUTION Big Cooling Diff Cover, which manages differential temperatures once the unit is working harder under a more planted rear end. For more on the brand behind these polyurethane RX8 differential mounts, visit the ODULA official website.
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Related RX8 Upgrades
Yes, the ODULA polyurethane differential mounts suit all RX8 models from 2003 through to 2012, covering both Series 1 and Series 2. There is no need to distinguish between series when ordering - one set covers the full production range.
The factory rubber mounts soften progressively with age and heat exposure. That softening introduces movement at the differential mounting points, which shows up as axle tramp under load, a vague feel through the rear drivetrain, and a rear end that can feel nervous over mid-corner bumps.
Because these are locating mounts rather than chassis braces, the character change is notably smooth. The rear end feels quieter, calmer and more tied together over rough surfaces rather than simply stiffer, making them a practical choice for road-driven RX8s as well as track-focused builds.
These mounts belong at the beginning of a staged chassis build. Locating the differential mounting point firmly before adding upper or lower bracing means you are tightening what moves first. Any subsequent brace or bar then works against a stable foundation rather than a floating reference point.
Polyurethane resists the heat and age-related softening that gradually degrades standard rubber mounts. On a high-revving rotary application where rear-end response is closely felt by the driver, maintaining a consistent, firm mounting location pays dividends in predictability on corner exits and during load transitions.
With the differential properly located, front upper and lower chassis rigidity becomes the logical next focus. A front strut brace with brake cylinder stopper addresses the front upper structure, while a front lower arm bar adds rigidity at the lower front. Owners pushing the drivetrain harder should also consider a performance differential cover to manage temperatures under the more planted rear end.
The ODULA mounts are designed as direct replacements for the factory differential mounting rubber, fitting the existing mounting locations on all RX8 models. No modification to the vehicle is required.
