Lower spoiler / Diffuser / Valance

Porsche 991.1 Rear Bumper Splitters - OEM-Respecting Aero Enhancement for the Narrow Body Rear Bumper

Rear bumper splitters for the Porsche 991.1 narrow body cars are exterior aerodynamic accessories designed to boost the visual presence and performance character of your 991.1 911 while providing functional benefits beyond style.

Fits:

• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16

Not compatible with GT3, GT2, Speedster, Turbo or vehicles with aftermarket bumpers.

Manufactured to integrate seamlessly with the factory rear bumper lines, these splitters bolt on quickly with no drilling or modification required, making them a popular add-on for enthusiasts seeking a subtle yet impactful upgrade.

What Rear Bumper Splitters Do

Rear bumper splitters attach to the lower edge of the rear bumper and serve multiple roles:

• Enhance the rear visual stance with a sportier, more aggressive look
• Improve rear aerodynamic balance when fitted with complementary aero parts
• Shield the rear bumper from road debris and kerb scuffs
• Maintain the classic Porsche silhouette while modernising the rear appearance

Unlike full diffusers, these splitters focus on refining airflow and reinforcing the rear bumper’s visual strength, respecting the original design language of the 991.1 platform.

Why You Should Upgrade to Rear Splitters

Standard factory rear bumpers offer minimal aerodynamic shaping and protection at speed. Upgrading to rear bumper splitters is ideal if you want to:

• Add a more aggressive and refined exterior look that flows with Porsche design
• Protect vulnerable bumper edges from rock chips and minor impacts
• Complement other exterior upgrades such as front lips, side skirts or rear spoilers
• Improve perceived aerodynamic balance without a full racing diffuser setup
• Increase resale appeal by showcasing thoughtful exterior enhancements

Unlike race-only parts, these splitters are engineered for road use while echoing motorsport inspiration — a perfect balance for both street and occasional performance driving.

Easy Installation and Quality Fitment

Rear bumper splitters for the 991.1 are designed to:

• Bolt directly to the factory rear bumper
• Respect OEM panel lines without cutting or trimming
• Require minimal installation time (typically 10–15 minutes per side)
• Work with narrow and wide body rear bumpers depending on your 997.1 variant

This makes them an accessible upgrade for DIY enthusiasts and professional workshops alike.

Key Benefits at a Glance

• OEM-respecting bolt-on rear splitters for the 991.1
• Enhances visual strength and road presence
• Adds protection to rear bumper edges
• Quick installation with no drilling
• Complements other exterior aero upgrades
• Available for narrow and wide body configurations                                                                                                                                                           

Porsche 991.1 Rear Bumper Splitters - OEM-Respecting Aero Enhancement for the Wide Body Rear Bumper

Rear bumper splitters for the Porsche 991.1 wide body cars are exterior aerodynamic accessories designed to boost the visual presence and performance character of your 991.1 911 while providing functional benefits beyond style.

Fits:

• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16

Not compatible with GT3, GT2, Speedster, Turbo or vehicles with aftermarket bumpers.

Manufactured to integrate seamlessly with the factory rear bumper lines, these splitters bolt on quickly with no drilling or modification required, making them a popular add-on for enthusiasts seeking a subtle yet impactful upgrade.

What Rear Bumper Splitters Do

Rear bumper splitters attach to the lower edge of the rear bumper and serve multiple roles:

• Enhance the rear visual stance with a sportier, more aggressive look
• Improve rear aerodynamic balance when fitted with complementary aero parts
• Shield the rear bumper from road debris and kerb scuffs
• Maintain the classic Porsche silhouette while modernising the rear appearance

Unlike full diffusers, these splitters focus on refining airflow and reinforcing the rear bumper’s visual strength, respecting the original design language of the 991.1 platform.

Why You Should Upgrade to Rear Splitters

Standard factory rear bumpers offer minimal aerodynamic shaping and protection at speed. Upgrading to rear bumper splitters is ideal if you want to:

• Add a more aggressive and refined exterior look that flows with Porsche design
• Protect vulnerable bumper edges from rock chips and minor impacts
• Complement other exterior upgrades such as front lips, side skirts or rear spoilers
• Improve perceived aerodynamic balance without a full racing diffuser setup
• Increase resale appeal by showcasing thoughtful exterior enhancements

Unlike race-only parts, these splitters are engineered for road use while echoing motorsport inspiration — a perfect balance for both street and occasional performance driving.

Easy Installation and Quality Fitment

Rear bumper splitters for the 991.1 are designed to:

• Bolt directly to the factory rear bumper
• Respect OEM panel lines without cutting or trimming
• Require minimal installation time (typically 10–15 minutes per side)
• Work with narrow and wide body rear bumpers depending on your 997.1 variant

This makes them an accessible upgrade for DIY enthusiasts and professional workshops alike.

Key Benefits at a Glance

• OEM-respecting bolt-on rear splitters for the 991.1
• Enhances visual strength and road presence
• Adds protection to rear bumper edges
• Quick installation with no drilling
• Complements other exterior aero upgrades
• Available for narrow and wide body configurations                                                                                                                                                           

Fits:
Porsche 991.1 Carrera 2 / Carrera 4
Porsche 991.1 Carrera 2S / Carrera 4S

Product Description

Rennline's carbon fiber rear diffuser is a great way to give the rear of your 991 an eye catching OEM+ upgrade by replacing the boring plastic unit. 

Made from hand-laid carbon fiber using the latest manufacturing technologies, our diffuser is sure to add a completely bespoke feel to the back of your 911 (991.1)

• Hand-laid carbon fiber construction
• High gloss finish with UV and heat protection
• Complete carbon fiber replacement for OEM diffuser
• Designed from the ground up using state of the art 3D scanning technology
• Installs in place of OEM unit with no adhesive
• Fits all 991.1 Carrera/S models with standard bumpers
• Does not fit Turbo or GT models
• OEM fit and finish