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Fabspeed RENNKRAFT® Long Tube Header System Porsche 718 GT4 RS / Spyder RS

SKU: FS.POR.718GT4RS.HDR.SC
Price
$8,466.95
Currently Backordered - You can still place your order and we'll ship your order as soon as the product is back in stock!

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product Description

 

 

The Fabspeed RENNKRAFT® Long Tube Header System is the ultimate performance header upgrade for the Porsche 718 GT4 RS (2022+), meticulously engineered to maximize power, torque, sound quality, and thermal efficiency over the restrictive factory exhaust manifolds. Featuring true long-tube header design, high-output HJS catalytic converters, and Fabspeed’s patented RENNKRAFT® modular system, this setup dramatically improves exhaust flow and turbo efficiency, yielding substantial horsepower and torque gains without requiring ECU tuning when equipped with the included sport catalysts. The modular design lets you quickly switch to cat-bypass pipes for track use, and robust heat shielding protects surrounding components under extreme conditions.

Fitment Notes

  • Designed specifically for Porsche 718 Cayman GT4 RS and Spyder RS models 2022 and newer.

  • Direct bolt-on installation — no cutting, welding, or fabrication required.

  • Includes sport (HJS) catalytic converters that are engineered to avoid CEL with the sport cat option installed (not including Europe).

  • Cat bypass (race) option available for track-focused builds — intended for closed course use and may trigger check engine lights on OBD2 vehicles.

  • Not CARB or EPA certified; verify local emissions rules before purchasing.

Included

  • Fabspeed RENNKRAFT® long tube header assembly with modular quick-release V-bands.

  • HJS tri-metallic 200-cell sport catalytic converters (street/track use) with modular swap-out capability.

  • Cat-bypass pipe option (race) for track applications (may cause CEL).

  • Bi-layer heat shielding components engineered to withstand extremely high temperatures.

  • OEM-equivalent mounting hardware and gaskets for bolt-on fitment.

  • Installation instructions.

Product Specs

  • Material: CNC mandrel-bent T304 stainless steel headers and hardware.

  • Modular Design: Patented RENNKRAFT® V-band system enables quick swapping between sport catalysts and cat bypass for race conditions.

  • Heat Shielding: Bi-layer ceramic fiber/stainless shell shielding rated up to 2400°F (1300°C) protects surrounding components from radiant heat.

  • Performance: Up to +48 WHP and +54 ft-lbs torque at ~4700 RPM (≈ +57 HP at crank) — increases peak wheel power from ~456 to ~490 HP.

  • Weight Savings: Approximately 5 lbs (2.3 kg) saved with sport cats and 13 lbs (5.9 kg) with cat-bypass over stock headers.

  • Fitment: Engine-specific bolt-on design for Porsche 718 GT4 RS platforms.

  • Warranty: Backed by Fabspeed Lifetime Warranty.

Product Features

  • True long-tube header design delivers significantly enhanced exhaust scavenging for better power and torque.

  • Modular RENNKRAFT® system makes swapping between catalytic and non-catalytic configurations quick and tool-friendly.

  • High-flow HJS sport catalytic converters optimize performance while minimizing check engine light risk.

  • Bi-layer heat shielding dramatically reduces radiant heat, protecting engine bay components and improving thermal management.

  • Equal-length runners with high-velocity merge collectors maximize flow efficiency and sound quality.

  • Bolt-on installation requires no fabrication, making this a relatively straightforward upgrade for experienced installers

View Product Install Guide