Visible carbon fibre diffuser board Mansory for Bentley Bentayga

Mansory Rear Diffuser Board — Bentley Bentayga Carbon Fiber

The Mansory Rear Diffuser Board for Bentley Bentayga is the aerodynamic counterpoint to the widebody kit — a visible-carbon-fiber rear diffuser that integrates with the OEM rear-bumper geometry and the Mansory widebody stance, channels exhaust flow in coordinated paths, and provides rear-end visual weight that balances the front widebody extension. As a part of the wider Mansory Carbon Fiber Widebody kit set for Bentley Bentayga, this is the part that closes the aerodynamic dialogue between front and rear.

Design language: rear aero integration

The Mansory diffuser is not an oversized splitter or a purely visual element — it is an integrated diffuser geometry that works with the OEM exhaust outlet positioning and the rear-bumper airflow path. The channels are dimensioned to guide exhaust gas and underbody flow, creating a low-pressure zone at the rear bumper that reduces wake turbulence. The visual result is a coherent aero programme that reads as engineered rather than as a cosmetic kit.

Construction and materials

• Diffuser board: visible-carbon-fiber weave, vacuum-sealed composite, 2.8 mm wall thickness
• Channels: 3 integrated aero channels aligned with OEM exhaust outlets
• Integration: OEM-fitment rear-bumper geometry, fastens to OEM attachment points
• Exhaust compatibility: designed for OEM Bentayga exhaust outlets (dual or quad configuration)
• Attachment: stainless-steel hardware, no cutting or modification to OEM bumper required
• Finish: factory-gloss visible-carbon-fiber weave, clear coat applied before shipment

Aerodynamic rationale

The Bentayga is a large SUV with significant underbody frontal area and a blunt rear end. The OEM rear bumper geometry creates a wake turbulence that increases aerodynamic drag at highway speeds. The Mansory diffuser board reduces this drag by 4–6% (validated in wind-tunnel testing) by creating a low-pressure zone that collapses the wake. For a car with the Bentayga's mass and frontal area, a 4–6% drag reduction translates to measurable top-speed improvement and reduced fuel consumption at sustained highway speeds.

Visual integration with the widebody

The Mansory diffuser is proportioned to balance the visual weight of the 80 mm per-side widebody fender extension. Without a matching rear-aero element, a wide-body front on a narrow-appearance rear reads as visually unbalanced. The diffuser board extends the rear bumper line and adds visual depth, creating the impression that the rear of the car is as aggressively proportioned as the front. This is the visual coherence that drives the choice to specify both parts as a pair.

Fitment and compatibility

The diffuser is designed for the first-generation Bentley Bentayga (2015–2020) and the 2020 facelift, with both dual and quad exhaust configurations. The channels are optimized for the OEM tailpipe positioning and do not require relocation or modification to the OEM exhaust system. The rear bumper fitment remains at factory spec; the diffuser mounts to the OEM attachment points with stainless-steel hardware.

Professional installation

Installation requires removal of the OEM rear bumper (30 min), positioning of the diffuser board against the bumper skin using the pre-drilled holes (15 min), fastening with stainless-steel hardware (10 min), and re-fitment of the bumper trim and sensor harnesses (30 min). Total installation time is 1.5–2 hours. No welding or OEM modification is required.

Pair with the Mansory Widebody Kit, Front Grill Masks, and Flying-B Sculpture for the complete exterior. Order via WhatsApp +44 7488 818 747 or [email protected].

FAQ

Q: Will the diffuser affect the exhaust note?
A: Slightly — the diffuser channels direct exhaust flow but do not restrict it. Most owners report a slightly deeper tone at high throttle, but OEM cruising note is unchanged.

Q: Is the diffuser road-legal?
A: Yes. The diffuser is passive aero with no moving parts and no emissions or noise impact. It meets all relevant regulations.

Q: Can I fit this without the widebody kit?
A: Technically yes, but it is visually unbalanced. The diffuser is designed to pair with the widebody for visual and aerodynamic coherence.

Q: Lead time?
A: 2–3 weeks for stocked configuration.