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.

Cancellations / Returns

Original sales receipt or order number must accompany all return requests.

Forza Motor Works accepts returns for exchange, store credit, or refund within fourteen (14) calendar days of the delivery date, subject to the terms and conditions below. After fourteen (14) calendar days, all sales are final unless otherwise approved in writing by Forza Motor Works.

To be eligible for return, products must be in new, unused, unaltered, and resalable condition, including all original packaging, instructions, hardware, documentation, and accessories. Returned items must not show any signs of installation, use, wear, damage, modification, painting, coating, or alteration of any kind.

The following items are non-returnable and non-refundable:

• Special-order products
• Custom-built or made-to-order products
• Products manufactured to customer specifications
• Custom color or finish products
• Manufacturer-direct-shipped products designated as non-returnable
• Products with extended lead times, including but not limited to headers, exhaust systems, wheels, and other special-order performance products
• Any item specifically identified on the product page as non-returnable

Orders for special-order, custom-built, made-to-order, vehicle-specific, or manufacturer-direct-shipped products may not be canceled once the order has been submitted to the manufacturer.

If an item is received damaged during shipping or was shipped incorrectly by Forza Motor Works, Customer Support must be contacted within forty-eight (48) hours of delivery. Claims for shipping damage must include clear photographs of the product, packaging, shipping box, and shipping label at the time of unpacking.

Products determined by Forza Motor Works to have been incorrectly shipped may qualify for replacement, store credit, or refund at our sole discretion. Manufacturer defects are subject to the applicable manufacturer's warranty policies and procedures. Forza Motor Works does not provide any separate product warranty unless expressly stated in writing.

All returns must be authorized prior to shipment and must be assigned a Return Merchandise Authorization (RMA) number. The RMA number must be clearly displayed on the outside of the return package. Returns received without an authorized RMA number may be refused or denied credit.

To obtain a Return Merchandise Authorization (RMA), please contact:

Forza Motor Works
Email: info@forzamotorworks.com

All refunds, exchanges, and store credits are contingent upon inspection and approval of the returned merchandise. Forza Motor Works reserves the right to deny any return that does not comply with this policy.

Approved returns may be subject to a restocking fee of up to twenty five percent (25%) of the purchase price. Original shipping charges are non-refundable. Customer is responsible for all return shipping costs unless the return is the direct result of an error made by Forza Motor Works.

FITMENT, INSTALLATION & PRODUCT USE

Customer is responsible for verifying vehicle compatibility, fitment, and intended use prior to installation. While Forza Motor Works makes reasonable efforts to provide accurate product information and fitment guidance, final responsibility for compatibility rests solely with the customer.

Products that have been installed, test-fitted, modified, painted, coated, damaged, or otherwise used are not eligible for return.

Many aftermarket performance products are intended for off-road, racing, or competition use only and may not be legal for use on public roads in all jurisdictions. Customer is solely responsible for determining compliance with all applicable federal, state, and local laws and regulations.

LIMITATION OF LIABILITY

FORZA MOTOR WORKS SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL DAMAGES ARISING FROM THE PURCHASE, INSTALLATION, USE, MISUSE, FAILURE, OR INABILITY TO USE ANY PRODUCT SOLD BY FORZA MOTOR WORKS.

FORZA MOTOR WORKS SHALL NOT BE RESPONSIBLE FOR LOSS OF TIME, LOSS OF REVENUE, LOSS OF PROFITS, LOSS OF VEHICLE USE, TOWING CHARGES, RENTAL VEHICLE COSTS, STORAGE FEES, DIAGNOSTIC FEES, INSTALLATION COSTS, REMOVAL COSTS, ALIGNMENT CHARGES, TUNING FEES, SHIPPING EXPENSES, FINES, PENALTIES, PROPERTY DAMAGE, VEHICLE DAMAGE, OR ANY OTHER INCIDENTAL OR CONSEQUENTIAL LOSS OR EXPENSE.

TO THE MAXIMUM EXTENT PERMITTED BY LAW, FORZA MOTOR WORKS' TOTAL LIABILITY FOR ANY CLAIM ARISING FROM THE PURCHASE OR USE OF A PRODUCT SHALL NOT EXCEED THE AMOUNT PAID FOR THE SPECIFIC PRODUCT GIVING RISE TO THE CLAIM.

By placing an order with Forza Motor Works, the customer acknowledges and agrees to all terms and conditions contained herein, including all return, exchange, warranty, and limitation-of-liability provisions.

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