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The CMST carbon fibre aero kit for the Porsche 911 covers five pieces: a front lip, rear lip, side skirt lips, vented carbon fibre bonnet, and a fixed rear wing — all manufactured from carbon fibre and designed to fit the 911's factory body mounting points. Each exterior piece installs without structural modification to the 911's body, and the kit is available to order with individual pieces or as a complete set. The carbon fibre bonnet is a full panel replacement for the factory steel piece, while the front lip, rear lip, and side skirts are additive pieces that mount to existing bumper and sill structures.

• Vehicle: Porsche 911 (confirm generation compatibility at time of order)
• Pieces: Front lip, rear lip, side skirt lips, carbon fibre bonnet, rear wing
• Material: Carbon fibre (all pieces)
• Finish: Gloss 2×2 twill-weave carbon, exposed
• Bonnet: Full panel replacement with integrated vent
• Fitment: Direct bolt-on to existing body mounting points (bonnet: hinge transfer required)

Carbon Fibre Front Lip

The CMST front lip for the 911 installs beneath the factory front bumper's lower valance. The 911's front end geometry varies significantly across generations — the 991 (2012–2019) and 992 (2019-onward) carry different bumper profiles, and the front lip is generation-specific. The piece extends the front fascia's lower edge forward, adding a splitter element that sharpens the car's approach angle and creates the visual shadow line associated with competition-derived front ends. On the standard 911 Carrera, where the factory front end is clean and conservative relative to the GTS and Turbo models, the front lip makes the most visible impact.

Carbon fibre construction here matters because the 911 is a car where mass distribution is critical. Porsche's rear-engine layout is famously demanding of precise weight balance, and adding mass to the front end — even a small amount — slightly alters the car's polar moment of inertia. An FRP or polypropylene front lip weighs modestly more than a carbon equivalent. On a track-driven 911, the lighter carbon piece is the correct specification. On a road-driven car, the difference is negligible in practice but directionally sound. Browse the full CMST front lip range for Porsche for generation-specific fitment options.

Carbon Fibre Side Skirt Lips

The side skirt lips mount to the underside of the 911's factory sill panels. The 911's sill structure is relatively narrow compared with a GT car or a mid-engine sports car — the rear-engine layout means no large tunnel or sill-mounted components intrude, and the sill itself is a clean structural box. The CMST skirt lips follow this sill profile, extending the lower body outward and downward to create visual width and lower the car's apparent centre of mass from the side.

On the 911, where the car already sits relatively low on factory suspension, the side skirt lips provide the visual benefit of further lowering the perceived roofline-to-sill ratio without any suspension modification. This is particularly noticeable on the 992's standard body — which, compared with the wide-body Carrera 4S, GTS, or Turbo variants, can appear narrower than its wider siblings. Side skirt lips partially compensate for this optical difference, making the standard-body 911 read as broader from a straight-on view. For skirt options across Porsche models, the CMST Porsche side skirt collection covers current availability.

Vented Carbon Fibre Bonnet

The carbon fibre bonnet is a complete replacement for the 911's factory steel front bonnet — the frunk lid, which covers the front luggage compartment on this rear-engine car. The CMST bonnet incorporates an extraction vent positioned toward the rear of the panel. On a rear-engine car, the front compartment does not contain an engine, so the thermal management argument for a vented bonnet differs from a front-engine application. The vent on the 911 bonnet is primarily a design element, though it does allow warm air from brake cooling ducts and front radiators (on Carrera 4 and Turbo variants that carry front-mounted heat exchangers) to exit the front compartment rather than building up under the panel.

The weight saving from a carbon bonnet on the 911 is particularly worthwhile given Porsche's rear-weight-bias architecture. The front bonnet sits directly over the front axle — the lightest point on a rear-engine car's weight distribution. Removing mass here shifts the weight distribution fractionally toward the front axle, which counteracts the 911's natural rear-heavy tendency. The gain is small but directionally desirable for owners who use their 911 on a circuit. A carbon bonnet can save 5–10 kg over a factory steel panel depending on thickness and layup, and on a car weighing approximately 1,450–1,600 kg, that saving at the front axle is more significant dynamically than the same saving from a rear panel.

For the bonnet in the context of the broader CMST Porsche range, see the CMST carbon fibre bonnet range for Porsche.

Carbon Fibre Rear Lip

The rear lip attaches to the lower edge of the 911's rear bumper. The 911's rear end carries the engine and typically the factory active rear spoiler — one of the most recognised aero features on any production sports car. The CMST rear lip positions itself below the bumper line, beneath the factory spoiler's operating zone, so the two elements work together without conflict. The carbon rear lip adds a horizontal ledge element to the rear bumper that increases the visual depth of the rear end and complements the factory spoiler above it.

On 992-generation cars without the optional rear spoiler upgrade, the CMST rear lip and rear wing combination creates an aftermarket solution that provides both lower-bumper definition and upper-bootlid aerodynamics in a coherent package. On cars with the factory active rear spoiler, the CMST rear lip adds visual definition to the lower bumper while the factory spoiler handles the bootlid aero function.

Carbon Fibre Rear Wing

The CMST carbon rear wing mounts at the trailing edge of the 911's engine cover. The 911's rear architecture — rear-mounted engine with the engine cover doubling as the aerodynamic surface above the rear axle — means a rear wing has an unusually direct relationship with the rear suspension and tyre contact patches. A wing that generates downforce at the 911's rear axle is applying load directly above the drive and steering surfaces.

CMST's rear wing for the 911 is a fixed-element design. It does not replicate the 911's factory variable-angle active rear spoiler, which adjusts angle automatically based on speed and driving mode. The CMST wing sets a fixed angle, providing consistent downforce at speed. Owners who retain the factory active spoiler mechanism should confirm whether the CMST wing mounts at the same location or alongside it — on most 911 variants, a fixed aftermarket wing replaces rather than supplements the factory spoiler mounting.

To compare wing options for the 911, including fixed spoilers and full GT-style wings, see the CMST rear wing collection for Porsche. For the complete picture of CMST pieces available for the 911, the CMST Porsche body kit page lists all available configurations.

Choosing Between Carbon and FRP on a 911

The CMST 911 kit is offered in carbon fibre across all pieces. For owners who want body-colour exterior aero rather than exposed carbon — a common choice on 911s in Chalk, Crayon, or Pastel Yellow — some pieces can be ordered in FRP for paint. However, the bonnet is most commonly specified in exposed carbon regardless of body colour; on a 911, a carbon bonnet is one of the most immediately recognisable modifications and is rarely painted over.

Front and rear lips in body colour on a darker 911 (Jet Black, Basalt Black, Dark Olive Metallic) creates a sleaner, blended look where the aero pieces read as factory GT options rather than obvious aftermarket additions. Exposed carbon on those same lips creates explicit contrast and signals the modification. Neither approach is wrong; they suit different ownership philosophies. Owners who drive their 911 aggressively and use it on circuit tend to prefer exposed carbon, which also shows the lightweight material intent. Owners who want a clean OEM-plus aesthetic more often choose body colour for the lips and skirts.

Frequently Asked Questions

What 911 generation does the CMST kit fit — 991 or 992?

The CMST 911 aero kit is generation-specific. The 991 (2012–2019) and 992 (2019-onward) have different bumper profiles, bonnet dimensions, and rear end proportions. Confirm your exact 911 model year and variant (Carrera, Carrera S, Carrera 4, GTS, Targa, Turbo) with AME Motorsport before ordering, as the correct piece depends on both generation and body width variant.

Will the CMST vented carbon bonnet affect the 911's frunk storage space?

No. The CMST carbon bonnet is a replacement for the factory bonnet panel and attaches to the same hinge points. The internal volume of the front luggage compartment is determined by the structural front body, not by the outer bonnet panel, so storage capacity is unchanged. The vent is an external surface feature only and does not penetrate the compartment lining.

Does a carbon fibre front lip on the 911 require modification to the factory front bumper?

No structural modification to the factory bumper is required. The CMST front lip clips and bolts to existing lower bumper mounting points. In some applications, a small number of holes may be drilled into the underside of the bumper's lower valance to accommodate additional fixing points; this is reversible and does not affect the bumper's structural function or appearance when the lip is installed.

How does the CMST carbon rear wing affect the 911's factory active spoiler?

On 911 variants with the factory active rear spoiler (standard on many 991 Carrera S, Turbo, and Turbo S models), the CMST fixed rear wing typically replaces the factory active spoiler at its mounting position. The factory spoiler's actuator mechanism would need to be deactivated. Owners who want to retain the factory variable-deployment spoiler should not install the CMST fixed wing in the same location. Discuss mounting options with your installer before proceeding.

Are the CMST 911 aero pieces road-legal in Australia?

Carbon fibre aero pieces that do not extend the vehicle beyond the 2,500 mm maximum width, do not create exposed sharp edges that could injure pedestrians in a collision, and are securely mounted pass Australian state vehicle standards. All CMST pieces are designed for road use. Owners in states with periodic roadworthy inspections should retain installation records and confirm fitment details with a registered vehicle examiner if required.

Can I start with just the bonnet and add the remaining pieces later?

Yes. Each CMST 911 piece is sold and fitted independently. The carbon bonnet is the most frequently fitted first piece on this car — it is the most visually prominent individual modification and the one that most directly benefits from the weight saving. Front and rear lips, side skirts, and the rear wing can be added subsequently in any order, as no piece depends on another being present first.

For the full CMST carbon fibre range for the Porsche 911 available through AME Motorsport, visit the CMST Porsche body kit collection or browse the complete carbon fibre body kit range across all brands and models.