Ferrari 458 Speciale Rear Diffuser / Aerodynamic Extractor 85794900
Genuine Ferrari rear aerodynamic extractor / rear diffuser assembly for the Ferrari 458 Speciale, referenced by OEM part number 85794900. Ferrari parts diagrams identify 85794900 as the complete aerodynamic extractor in the rear-bumper assembly. Ferrari 458 Speciale Rear Diffuser
Product Specifications
- Brand: Ferrari
- Model: 458 Speciale
- Product: Rear Diffuser / Aerodynamic Extractor
- Position: Rear
- OEM Part Number: 85794900
- Part Description: Complete Aerodynamic Extractor
- Quantity: 1
- Condition: Confirm actual condition
- OEM Status: Genuine Ferrari part
- Fitment: Ferrari 458 Speciale 2013–2015
- VIN Verification: Recommended
Rear Diffuser
The 85794900 assembly forms part of the 458 Speciale rear bumper aerodynamic package. Ferrari parts catalogues list it as the complete aerodynamic extractor, while used-parts listings identify it specifically as the rear diffuser/rear valance for the 458 Speciale. (Eurospares Ltd)
The component is positioned underneath the rear bumper and contributes to the aerodynamic design of the Speciale’s rear underbody.
Fitment
Designed for the:
- Ferrari 458 Speciale
- Ferrari 458 Speciale 2013–2015
Parts catalogues specifically associate 85794900 with the 458 Speciale rear-bumper diagram.
Verify the VIN and OEM part number before ordering.
Construction & Configuration
The 458 Speciale rear-bumper diagram shows 85794900 as the standard complete aerodynamic extractor, alongside a separate carbon-fiber aerodynamic extractor option 70003289 and carbon diffuser reference 85916400. (Ferrari Parts)
Therefore, the exact material and finish should be confirmed from the physical component before listing it as carbon fiber.
Condition Inspection
For a used diffuser, inspect:
- Main diffuser structure
- Aerodynamic fins
- Mounting points
- Screw holes
- Panel edges
- Heat exposure
- Scratches
- Cracks
- Distortion
- Previous repairs
- Surface finish
A used 85794900 assembly has been listed as a genuine Ferrari OE rear diffuser for the 458 Speciale. (Ricardo)
Package Contents
- 1 × Ferrari 458 Speciale Rear Aerodynamic Extractor / Diffuser
- OEM P/N: 85794900
Fasteners and separate aerodynamic fins should only be considered included if specifically supplied with the unit.
Installation
Professional installation is recommended.
- Verify the vehicle VIN.
- Confirm part number 85794900.
- Compare the replacement diffuser with the original.
- Inspect all mounting points.
- Check the rear bumper configuration.
- Test-fit the diffuser.
- Install the required fasteners.
- Check alignment with the rear bumper.
- Check exhaust and underbody clearance.
- Complete a final inspection.
Important Fitment Notice
85794900 is catalogued as a complete aerodynamic extractor for the Ferrari 458 Speciale rear bumper. It should not be confused with Ferrari 85916400, which is separately catalogued as a carbon diffuser. (Eurospares Ltd)
Confirm the exact part number, material and configuration before purchase.
Buyer Checklist
- Brand: Ferrari
- Model: 458 Speciale
- Position: Rear
- Product: Rear Diffuser / Aerodynamic Extractor
- OEM P/N: 85794900
- Condition: Confirm
- Material: Confirm
- Carbon: Not assumed
- Quantity: 1
- VIN Compatibility: Recommended
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