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Kline Innovation Exhaust System for Porsche 718 GT4, Spyder & GTS

3rd Sep 2025

Kline Innovation Porsche 718 GT4/Spyder/GTS Exhaust - KL-POR-718GT4-RS-SS

Order link:

https://x-ph.com/kline-innovation-porsche-718-gt4-spyder-gts-exhaust-kl-por-718gt4-rs-ss/

The Kline Innovation Porsche 718 GT4/Spyder/GTS Exhaust System is engineered to transform the driving experience of Porsche’s most track-focused models. Designed for the 2019–2024 Porsche 718 Cayman GT4, 718 Spyder, and 718 GTS, this exhaust replaces the restrictive factory setup with lightweight, high-performance components crafted from F1-grade materials.

At the core of the system is a fully bypassable lightweight Inconel 625 X-pipe silencer, which eliminates the heavy chambered rear silencer, reducing weight dramatically while elevating the exhaust pitch into an exotic, race-inspired tone. Optional removal of the OPF and catalysts, replaced by either HJS motorsport catalysts or de-cat pipes, further unlocks sound and performance, producing an intoxicating high-pitched scream under load.

Kline Innovation’s advanced valvetronic system offers true versatility: stealth mode with valves closed for refined street driving, or raw, unhindered performance with valves open. Optional pre-preg carbon fiber exhaust tips complete the system with a striking visual upgrade that complements Porsche’s aggressive styling.

Performance Benefits

  • Significant weight reduction compared to the stock exhaust system
  • Improved exhaust flow with optimized cross-sections for torque and power balance
  • Gains of up to 20 hp with HJS motorsport catalysts or de-cat setup
  • No drone when replacing OPF with Kline’s specialized silencer
  • Exotic tonal range inspired by motorsport

Technical Specifications

  • X-pipe diameter: 63.5mm
  • Silencer transit: 50mm
  • Catalyst pipe diameter: 63.5mm
  • Catalyst overall cross-section: 122mm
  • Manifold primaries: 45mm, secondaries: 63.5mm

Rear Silencer Section Options

  • 304-grade stainless steel: 13.5 kg
  • F1-grade Inconel 625 superalloy: 7.5 kg

Catalyst Manifolds

  • 100-cell catalysts
  • 304-grade stainless steel: 4.2 kg each
  • F1-grade Inconel 625 superalloy: 2.8 kg each

Fitment

  • Porsche 718 Cayman GT4 (2019–2024)
  • Porsche 718 Spyder (2019–2024)
  • Porsche 718 GTS (2019–2024)