Kline Innovation Performance Exhaust for Porsche 718 GT4, Spyder & GTS 4.0L (2020–Present)

Description

The Kline Innovation Valvetronic Exhaust System for the Porsche 718 (982) Cayman GT4, Spyder & GTS 4.0L is a high-performance, valve-controlled catback exhaust designed to transform sound and performance for the naturally aspirated 4.0 L flat-six. Precision engineered with optimized cross-sections and lightweight materials, this system replaces the restrictive factory silencer, opens up exhaust flow, and brings out a more emotional, quad-exotic exhaust character — from refined cruising with the valves closed to an aggressive, free-breathing scream with them open. With modular catalyst options and premium construction, it elevates both the auditory experience and responsiveness of your GT4 or Spyder.

Fitment Notes

• Fits Porsche 718 Cayman GT4 (982; 2019+) and 718 Spyder (982; 2020+) with the naturally aspirated 4.0L flat-six engine.

• Direct catback valvetronic replacement for the factory rear exhaust — uses OEM mounting points.

• Works with OEM over-axle pipes (OAPs) and optional Kline manifolds or downpipes.

• Modular catalyst options (100 cell, 200 cell, or decat) allow tailoring to performance goals.

• Recommended for street, canyon, and track enthusiasts who want a richer sound and improved throttle response.

Included

• Kline Innovation valvetronic catback exhaust assembly tailored to the 718 GT4/Spyder platform.

• Integrated valve control hardware for adjustable sound modes (quiet cruise to fully open).

• Premium installation hardware and gaskets for direct bolt-on fitment.

• Optional Carbon Fiber or Inconel exhaust tip options sold separately.

Product Specs

• Exhaust style: Valvetronic catback system — variable sound control.

• Material options: 304 Stainless Steel or F1-grade Inconel 625 components for lighter weight and heat resistance.

• Cross-sections:

  • X-pipe: ~63.5 mm

  • Silencer transit: ~50 mm

  • Catalyst pipe: ~63.5 mm overall cross-section ~122 mm

  • Manifold primaries ~45 mm; secondaries ~63.5 mm (chosen for balanced torque and top-end power)

• Catalyst configurations: 100 cell, 200 cell, or decat pipes (depending on local regulations and performance goals).

• Sound modes: Stealth/quiet with valves closed → raw/higher-volume with valves open

• Fitment: OEM-style mounts; no cutting/modifications for basic installation.

Product Features

• Valvetronic exhaust control: Actively modulates exhaust flow for quiet cruising or race-inspired sound on demand.

• Optimized flow geometry: Tuned X-pipe and silencer layout improve scavenging and reduce backpressure.

• Modular catalyst choices: Choose between emissions-capable high-flow catalysts or decat pipes for up to ~20 hp gains with tune and AFR correction.

• Premium construction: Options in Inconel 625 significantly reduce weight and improve thermal resilience over stock.

• Enhanced tone: More exotic, engaging exhaust character with high-RPM clarity and minimal drone during cruising.

• Direct bolt-on: OEM flange compatibility and design ensure straightforward installation with existing mounts

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