Front bonnet II Mansory Carbon for Lamborghini Aventador S

Mansory Carbon Front Bonnet II for Lamborghini Aventador S

The Front Bonnet II is the more sculptural of the two carbon frunk-lid options inside the Mansory Body Kit for Lamborghini Aventador S. Where the plainer Bonnet I keeps a calmer, almost factory silhouette, the II goes overtly motorsport: a raised central spine bisects the panel, twin strakes flank it with a deeper draw, and the rear extraction lip stands proud of the cowl line. On the LP740-4 S the front compartment houses the luggage bay, brake-cooling plenum and the radiator crossover — venting that volume properly turns front-axle stability from a static spec into something the driver feels at 250+ km/h. The naturally aspirated 6.5 V12 sits behind the cabin, scissor doors hinge clear of the spine, and rear-wheel-steering tightens the platform from the back; this bonnet sharpens the front. Aluminium-CFRP monocoque hardpoints are untouched and the pre-SVJ bumper geometry below it is preserved.

Construction & Materials

The II is moulded as a single autoclave-cured prepreg shell with a bonded inner frame, then trimmed and pressure-tested before lacquer. The geometry is harder to lay than the I: the central spine and the strake walls demand careful ply orientation around three different draft angles, and Mansory choreographs the layup so that the visible 3K twill on the spine reads continuous from leading edge to trailing edge with no break across the vent shoulders. Below the cosmetic skin sits a structural sandwich tuned for impact at the leading-edge stone-strike zone.

• Outer ply: 3K twill prepreg, 2x2 weave, alignment tracked across spine and strakes
• Sub-skins: unidirectional carbon for torsional stiffness around the duct cut-outs
• Cure: autoclave at 120 C, ~6 bar, post-cure dwell for resin cross-link stabilisation
• Wall thickness: 1.6-2.1 mm cosmetic skin, 3.2 mm at strake walls and spine root
• Inner reinforcement: bonded glass-CFRP frame with stainless threaded inserts
• Approximate weight: ~5.6-6.4 kg vs OEM aluminium frunk lid (savings depend on hinge variant)
• Mounting: factory hinges, OEM gas struts, OEM latch interface
• Finish: high-gloss UV-stable lacquer, matte 2K, satin, or raw weave with sealer

Design & Visual Function

The II is a vent-led design rather than a styling flourish. The two strakes draw a wider footprint than the I — they sit further outboard and dig deeper into the panel, so the underlying mesh sees a larger column of air column above it. At motorway pace the static-pressure cap that builds over the leading edge of any front bonnet is exactly what stops front-bumper intakes from breathing properly; raising the spine and dropping the strakes behind it creates a low-pressure shadow that pulls air up and out of the front compartment, which in turn lets the brake-cooling plenum and radiator volume swallow more cold air at the bumper. It is the same trick GT3 cars use, scaled for a road bonnet.

Visually the II rewrites the front of the Aventador S. The central spine continues the line of the windscreen header and pulls the eye forward; the strakes echo the hexagonal cues Lamborghini uses on intake nostrils and tail-light grates. Reflections behave very differently than on the I — light travels along the spine instead of across a flat panel, so even on cloudy days the bonnet looks active. Owners who want the most theatrical front silhouette without going to the SVJ-style snorkel skin pick the II.

Extracted air simply rises into the boundary layer above the cowl and is shed past the windscreen base. Mansory tunes the trailing-lip height to keep the wiper sweep clean and avoid pulling debris onto the screen, and the spine angle is set so the rising column does not foul the air-conditioning intake at the base of the screen.

Compatibility & Fitment

Lamborghini Aventador S (LP740-4 S, coupé and Roadster, 2017-2021). The II uses the OEM frunk hinge points, factory gas struts and the original latch, and it sits over the unmodified front trunk volume. Pre-SVJ bumper geometry below it is untouched. Lower-side exhaust outlets at the rear are unaffected. Parking sensors, washer plumbing and any forward camera ducting carry over unchanged. The II is interchangeable on the same hinge set as Bonnet I — owners sometimes start on I, then upgrade to II once the rest of the kit is fitted.

Installation & Reversibility

Plan a working day. Realistic time on the bench is 4-6 hours: remove OEM frunk lid by uncoupling gas struts and lifting from hinges (two technicians), transfer hardware (latch striker, weather-strip channel, wiring grommet for any ambient sensors), trial-fit the II, set hinge shims so the spine sits flush with the windscreen header line, then torque mounting hardware to spec. The II requires more attention to gap-set than the I because the raised spine throws optical lines further if shut-line is off — budget extra time on the rear panel gap to the cowl. Reversibility is total: the OEM lid can be re-fitted with no trace. On the Aventador's CFRP/aluminium monocoque the surrounding methacrylate-bonded panels must not be loaded; never use the bonnet as a leverage point during fitment. Mansory-trained installers, or Lamborghini-certified body shops, are the recommended path. Paint prep when colour-matching: full sand, two-stage etch primer for carbon-to-paint key, base, clear; cure 16 h before refit.

Pairing within the Mansory Aventador S programme

The II is a deliberately bolder front statement, so Mansory generally pairs it with the upper-end aero on the rest of the car rather than the calmer trim parts. Three sibling cards tie in directly. The plainer Front Bonnet I is the alternative inside the same hinge envelope — owners debating spine-led drama versus a quieter cosmetic upgrade should read both pages side by side. The Bonnet Air Outtake is sometimes specified alongside the II to add a smaller extractor inboard of the strakes for cabin-HVAC heat shedding on track days, although on most road builds the II handles all the extraction the front compartment needs. The Trunk Carbon Cover finishes the inside of the frunk in matching weave so when the II is opened, the bay reads visually consistent rather than showing OEM grey trim against the carbon underside of the new lid.

Maintenance & Durability

Lacquered carbon on a forward-facing horizontal panel sees the harshest UV load on the whole car. Wash with pH-neutral shampoo and two-bucket method, dry with a plush microfibre, and apply a SiO2-based ceramic sealant every 6-9 months — the spine and strake walls receive a thicker pad of product because they catch the most direct sun. Avoid alkaline wheel cleaners drifting onto the bonnet during a wash, ammonia-based glass cleaners on the lacquer, and any abrasive sponge or clay-bar grade above ultra-fine. For the V12 thermal load there is no engine-bay heat directly under this panel — the V12 sits at the rear — so the II does not see the same heat-soak as the engine bonnet at the back of the car, but the radiator vent column does pull warm air up through the strakes during low-speed running and the lacquer near the trailing lip should be inspected annually for micro-cracking. Stone-chip on the leading edge can be repaired with a localised strip-and-respray inside Mansory's network; deep delamination is rare given the autoclave cure, but if it appears after impact, the panel is replaced rather than re-laminated.

Lead Time & Warranty

Production runs 4-8 weeks under Mansory's bespoke programme. Custom finishes, exposed-weave skins or paint-matched colours add about 2 weeks for prep and curing. Mansory's 12-month manufacturing-defect warranty covers delamination, lacquer failure under specified care, and hardware corrosion under normal use; collision damage and impact chips fall outside the warranty but inside Mansory's repair network.

FAQ

Q: How is the II different from Bonnet I on the same car?
A: The II has a raised central spine, deeper strake walls and a larger extraction footprint over the front trunk; the I keeps a calmer silhouette closer to OEM line. Visually the II changes the whole front of the car; functionally the II vents more air at speed.

Q: Does the II affect the front-bumper intakes or the radiator?
A: It improves them. By letting hot air leave the front compartment more freely, the bumper intakes feed cold air to the brake-cooling plenum and radiator with less pressure backup at speed.

Q: Does the II fit the Roadster as well as the coupé?
A: Yes — the front bonnet geometry is identical between Aventador S coupé and Roadster, the difference is at the rear targa structure not the frunk lid.

Q: Can I switch from Bonnet I to Bonnet II later without re-engineering the hinges?
A: Yes. Both bonnets share the OEM hinge envelope and the same gas-strut interface, so a I-to-II swap is a bench job, not a structural rework.

Q: Does the spine create wiper issues or screen turbulence?
A: No. Mansory tunes the trailing-lip height so extracted air rises cleanly past the cowl without disturbing wiper sweep or pulling debris onto the windscreen.

Q: Will paint-matched colour read the same as the OEM bonnet next to it?
A: Yes when prepped through Mansory's network — the carbon substrate is sealed and base-coat keyed so colour match against the OEM panel is metameric across daylight and tungsten.

Pair the Front Bonnet II with the wider Aventador S Mansory carbon programme for a fully sharpened front-end signature. Discuss spec, finish and lead time on WhatsApp +44 7488 818 747 or by email at [email protected].