Description
Disclaimer: This product has a lead-time of 10-13 weeks
Unleash the full performance and sonic potential of your Porsche 718 GT4 RS with the Kline Innovation Valvetronic Rear System, precision-engineered from F1-grade Inconel 625. This ultra-lightweight rear system delivers a dramatic reduction in weight, a sharper and more exotic exhaust note, and measurable power gains—perfectly complementing the motorsport pedigree of the GT4 RS.
At 500 hp, the GT4 RS is already a formidable machine. Kline elevates it further by removing the restrictive OEM rear silencer and replacing it with a lightweight X-pipe layout, optimized for flow and tone. Choose from fully bypassable Inconel silencers, HJS 100-cell motorsport catalysts, or de-cat pipes to tailor the system to your performance goals. The valvetronic system offers dual personality—stealth mode with valves closed, or an exotic, race-inspired scream with valves open.
Designed for maximum thermal efficiency and durability, every detail—from the precision-engineered 63.5mm cross sections to the triple-pass flow paths—has been optimized for power, response, and endurance. Optional Pre-Preg Carbon Fiber tips add the final touch of elegance to a system built for those who demand the best.
Performance Highlights:
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Constructed from F1-grade Inconel 625 – ultralight, corrosion-resistant, and thermally resilient
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Valvetronic technology for on-demand tone control
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Adds up to +20 hp with high-flow HJS catalysts or decat pipes
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X-pipe design enhances exhaust scavenging and high-RPM tone
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OPF delete-compatible with custom silencers to minimize drone
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Weight savings: Rear silencer (7.9 kg), Over-axle pipes (4.4 kg)
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Lifetime warranty on all Inconel components
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Direct fit for Porsche 718 GT4 RS, 2017–2025 model years
Technical Specifications:
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X-pipe diameter: 63.5mm
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Silencer transit: 50mm
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Catalyst pipe diameter: 63.5mm
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Catalyst overall cross-section: 122mm
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Manifold primaries: 45mm / secondaries: 63.5mm
Fitment:
Porsche 718 GT4 RS (2017–2025)
Warranty Information:
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Inconel components: Lifetime warranty
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Stainless steel components: 4-year warranty
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Catalytic converters: 4-year warranty*
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Flexible joints: 2-year warranty
*Catalyst warranty subject to correct vehicle setup (AFR, EGT, boost pressure). Kline reserves the right to deny claims resulting from improper engine tuning or installation.
For warranty claims, contact Kline directly before returning the product. Warranty does not cover shipping damage, third-party installation issues, or misuse.
