2.0ltr/2.5ltr to GT4 Rear Valance Conversion Non-Valved Exhaust System. Porsche 718 Boxster / Cayman  ›  9M982251052GT4

Ninemeister 9m 718 2.0ltr/2.5ltr to GT4 Rear Valance Non-Valved Exhaust System

The Ninemeister 9m Non-Valved Exhaust System is a performance exhaust upgrade designed for Porsche 718 2.0 and 2.5-litre models converted to a GT4-style twin-outlet rear valance.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)

Manufactured from durable 304-grade stainless steel, the system features fully heat-shielded over-axle pipes, an X-pipe centre section and an unsilenced rear section for a more pronounced sports exhaust sound.

Available with black or polished silver exhaust tips to complement the GT4-style rear conversion.

What Does It Do?

The Ninemeister exhaust replaces the relevant original exhaust sections with a performance-focused stainless steel system.

Its X-pipe centre section combines exhaust flow from the connecting pipework, while the unsilenced rear section provides a more direct and pronounced exhaust note.

Why Upgrade?

The original Porsche 718 exhaust is designed to balance performance, sound and refinement.

The Ninemeister system offers:

• Compatibility with GT4-style rear valance conversions
• A more aggressive sports exhaust sound
• Durable stainless steel construction
• Fully heat-shielded over-axle pipes X-pipe centre section
• Choice of black or polished silver exhaust tips

When Should It Be Fitted?

Ideal for Porsche 718 owners converting their vehicle to a GT4-style rear appearance and requiring an exhaust system compatible with the twin-outlet valance.

It is also suitable for owners seeking a more pronounced exhaust sound without electronically controlled valves.

Installation & Checks

The system is designed as a direct fit for compatible 718 2.0/2.5 models already fitted with the required GT4-style rear valance.

Check the condition of the exhaust mounting points, connecting hardware and surrounding heat shielding before installation.

As the system features an unsilenced rear section, confirm local road-use noise and exhaust regulations before fitting.

Key Features

• Ninemeister 9m performance exhaust system
• Designed for Porsche 718 2.0/2.5 turbo models
• Requires GT4-style twin-outlet rear valance
• 304-grade stainless steel construction
• Fully heat-shielded over-axle pipes X-pipe centre section
• Unsilenced rear section
• Non-valved exhaust configuration
• Black or polished silver exhaust tip options
• Suitable for GT4-style rear conversions

Porsche 718 GT4-Style Rear Valance Exhaust Systems & Performance Upgrades

Porsche 718 Cayman and Boxster owners converting their vehicles to a GT4-style rear valance require an exhaust system designed to accommodate the revised twin-outlet arrangement.

The Ninemeister 9m Non-Valved Exhaust System combines 304-grade stainless steel construction, heat-shielded pipework and an X-pipe centre section with a more pronounced exhaust sound.

Designed specifically for compatible 2.0 and 2.5-litre Porsche 718 models, it provides a practical exhaust solution for GT4-style rear bodywork conversions.