Air outtake splitter for rear bumper Mansory Carbon for Rolls-Royce Dawn

Air Outtake Splitter (Rear Bumper) — Mansory Carbon Dawn

The Mansory carbon air outtake splitter for the rear bumper is a fin-set finisher that lives on the outboard outlets of the Rolls-Royce Dawn rear bumper, sitting beside the exhaust-blind apertures and reading directly into the rear diffuser zone. It is a quiet sculptural detail rather than a placard — designed to deepen the rear three-quarter view of the drophead, give the twin-turbocharged 6.6-litre V12 a more architectural exhaust frame and pull the eye along the lower bodywork toward the diffuser. As a member of the wider Mansory Body Kit for Rolls-Royce Dawn programme, this part is specified by owners who already run a Mansory rear bumper variant — chrome or black exhaust blinds — and want the missing line of carbon between blind and diffuser to read with the same theatre as the bonnet bar, A-pillar cover and Pantheon grille frame.

Construction & Materials

The splitter is laminated as a single piece per side from aerospace-grade pre-impregnated carbon fibre. Mansory's body shop in Brand cures each fin set in autoclave under controlled ramp-and-soak conditions so the resin matrix locks dimensionally to the OEM bumper geometry — critical, because this part hugs a curved cut-line and a painted bumper edge for several hundred millimetres without play. Standard finish is deep-gloss lacquer over 3K twill, matched to the Rolls-Royce coachwork; a 2K plain weave and Mansory's signature forged-look composite are equally available for owners commissioning a more contemporary read.

• 3K twill carbon fibre standard; 2K plain weave or forged-look composite to bespoke order
• Pre-impregnated lay-up, autoclave-cured under vacuum bag at controlled ramp and soak
• Wall thickness ~1.6–2.0 mm in the show face, ~2.5 mm at the mounting tabs and clip lands
• Per-side mass approximately 0.45–0.6 kg depending on weave density and lacquer build
• OEM-style hidden fixings: stainless studs, encapsulated nuts, butyl tape on the seal face
• Deep-gloss UV-stable lacquer as standard; satin-clear or pigmented coachwork-tone lacquer optional
• Hand-polished edges; weave alignment matched to the diffuser extension and exhaust-blind frame
• Underside finished to the same tolerance as the visible face — important on a drophead seen from low angles

Design & Visual Function

On a Dawn, the rear three-quarter is one of the most photographed views — soft top down, coach door almost out of frame, the long rear deck falling toward the bumper. Until you add this splitter, the area between the exhaust blind and the diffuser extension is bodywork: painted, smooth, slightly anonymous. Mansory's fin set fills that vertical gap with a stack of thin carbon blades that catch low light, throw subtle shadow and give the eye a rhythm to follow as it moves from blind to diffuser. The blades are intentionally short on the leading face and taller toward the wheelhouse, so the silhouette grows — almost imperceptibly — toward the rear arch, supporting Mansory's wider Dawn theme of widened, broader-shouldered haunches.

The aerodynamic role is modest and honest: at speed the splitter cleans the airflow leaving the rear bumper relief, slightly ordering the wake between the wheel and the diffuser strakes. It is not a downforce device and is not pretending to be. The Dawn is a 2.56-tonne drophead built for waftability, not a wing-and-canard car, and Mansory's design language for this bumper region is specifically about presence rather than racetrack signalling.

Visually the part also resolves an awkward paint-break problem. The OEM rear bumper carries a wide painted area beside the exhaust outlet that, on darker coachwork, can look heavy. With the carbon splitter in place, the lower bumper reads in three layers — carbon blind, carbon splitter, carbon diffuser extension — separated by the existing paint. On lighter coachwork the lacquered weave glows; on Diamond Black or Madeira Red it reads as a deep, almost liquid frame around the chromed (or blacked) exhaust apertures.

Compatibility & Fitment

Designed for Rolls-Royce Dawn from 2015 to 2023, including Black Badge and all standard trims. Drophead convertible only — there is no coupé Dawn — and the splitter respects the soft-top stowage path, the OEM rear parking sensors and the bumper's lower seal face. It locates against the existing fixings of the Mansory rear bumper variants (chrome or black exhaust blinds) and against the OEM bumper edge for owners running carbon as a standalone accent without the full Mansory rear bumper. Although the Dawn shares much DNA with the Wraith, the rear deck, soft-top mechanism and bumper geometry are Dawn-specific — this splitter is not a fit for Wraith, Ghost or Phantom. Reverse cameras, parking radar and any factory-fitted rear-impact sensors continue to operate exactly as before, with no harness modification.

Installation & Reversibility

Per-side installation typically runs 45–75 minutes in a clean bay; both sides plus tape-on protective film and final detail work add up to roughly 2–3 hours. The bumper does not need to come off the car for this part. Workflow: thorough panel wipe with isopropyl, dry-fit each splitter to confirm gap and weave alignment, mark and apply 3M VHB or butyl tape per Mansory's pattern, set the captive studs into their lands, torque to spec, then walk the panel-gap with a feeler and re-seat as required. The splitter is fully reversible — removal leaves OEM clip lands and tape residue only, both of which a Rolls-Royce-trained body shop can clean back to factory in well under an hour. For owners who prefer not to handle the cure-time of structural tape, we recommend a Rolls-Royce-certified body shop or a Mansory-trained installer; for confident DIY enthusiasts, the part is genuinely accessible.

Pairing within the Mansory Dawn programme

The splitter is rarely specified alone. The natural rear-end pairing is with one of the Mansory rear bumper variants and with the diffuser extension — together they make the rear of the car read as a single coachbuilt sculpture rather than a series of accessories. Owners who want OEM-faithful theatre tend toward Rear Bumper with Chrome Exhaust Blinds, where the polished blind frames echo the Spirit of Ecstasy mascot and the front Pantheon surround. Owners building a more contemporary, monochrome read tend to Rear Bumper with Black Exhaust Blinds, where the splitter fins disappear into a single graphite mass with the blinds and roll-bar cover. In either case, the third element that closes the composition is the Extension for Rear Diffuser — its strakes pick up the rhythm of the splitter blades and carry it inboard toward the centreline. We tend to recommend specifying these three together; commissioning the splitter alone is perfectly possible, but it reads best as the connective tissue of a complete rear treatment.

Maintenance & Durability

A Dawn lives outside more than most Rolls-Royces. The soft top is down, the lacquered weave faces the sky, and over a season UV will work on any clear coat that has not been protected. Mansory's lacquer is UV-stable but a top layer of ceramic coat — a 9H-class quartz product applied by a detailer who understands clear-on-clear bonding — is the single best investment an owner can make. Carnauba is acceptable for show prep but should not be the long-term shield on a drophead. For day-to-day care, a pH-neutral shampoo, a lambswool mitt and a soft drying towel are all the splitter needs. What kills lacquered carbon is alkaline cleaners, ammonia-based glass sprays migrating onto the panel, abrasive sponges and uncovered washes at automated tunnels with rotating brushes — all to be avoided. If a fin chips at the leading edge, it is repairable: a Mansory-trained body shop can lift the lacquer locally, build the fibre with matched-weave patch, re-lay the lacquer and polish back without replacing the part. With reasonable care the splitter will outlast several detail cycles on the rest of the car.

Lead Time & Warranty

Lead time is typically 4–8 weeks from confirmed specification, reflecting Mansory's bespoke production schedule and the cure window required for autoclave-grade laminates. Each splitter pair carries a 12-month warranty against manufacturing defects from delivery, with full traceability of weave batch, resin lot and cure cycle on the production card. Bespoke weave choices and pigmented lacquers may extend the lead time slightly; the order desk confirms an exact week at deposit.

FAQ

Q: Will this splitter fit a Black Badge Dawn?
A: Yes. The rear bumper geometry is shared across Standard and Black Badge Dawn, and the splitter locates against the same OEM clip lands. Black Badge cars often pair the splitter with the black-exhaust-blind rear bumper for a cohesive monochrome read.

Q: How much weight does it add?
A: Per-side mass is roughly 0.45–0.6 kg depending on weave density and lacquer build — measured against the no-trim baseline. On a 2.56-tonne drophead the weight delta is rounding error; the part is specified for visual presence, not weight saving.

Q: Can I run the splitter without a Mansory rear bumper?
A: Yes. The splitter is engineered to locate against the OEM bumper edge as well as against the Mansory rear bumper variants. Owners who want a single carbon accent on an otherwise OEM rear can absolutely specify it standalone.

Q: Does the splitter clear the soft-top stowage and the parking sensors?
A: Yes. The geometry was developed specifically to respect the Dawn's soft-top stowage path and to leave the OEM parking radar and reverse camera fully unobstructed. Sensor coverage and warning patterns remain identical to factory.

Q: Lacquered weave or raw clear matt — which ages better on a drophead?
A: Lacquered weave with deep-gloss UV-stable clear is the longer-lasting choice on an open-top car, especially under intense summer light. Raw matt finishes are visually striking but require more disciplined ceramic protection to keep their depth over years.

Q: Will it fit a Wraith?
A: No. Despite shared underpinnings, the Dawn's rear bumper, deck and soft-top hardware are unique to the drophead. This splitter is engineered for Dawn only.

Specify this splitter alongside the chrome- or black-blind rear bumper and the diffuser extension to close the rear three-quarter as a single coachbuilt composition. Bespoke weave, lacquer and timing — WhatsApp +44 7488 818 747 or [email protected].