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Kline Exhaust Porsche 997.1 Turbo (2006-2009)

Price
$9,999.00

Select Material:

304 Stainless Steel
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
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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.

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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

Transform the sound, performance, and driving experience of your Porsche 997.1 Turbo with the Kline Innovation Performance Exhaust System. Engineered specifically for the first-generation 997 Turbo, this premium exhaust combines Kline's signature laminar-flow X-pipe, harmonically tuned silencers, and lightweight construction to deliver a more aggressive flat-six soundtrack while improving exhaust flow and turbocharged performance.

The Porsche 997.1 Turbo is powered by the legendary 3.6L twin-turbocharged Mezger flat-six engine, renowned for its durability, tuning potential, and exceptional performance. However, the factory exhaust prioritizes sound suppression, using restrictive catalytic converters and a chambered muffler design that limits the engine's natural exhaust character.

Kline developed its performance exhaust to address these limitations, creating a system that enhances the distinctive sound of the Mezger engine while reducing exhaust restriction and improving performance.

At the center of the system is Kline's 1D CLR laminar-flow X-pipe, engineered to balance exhaust pulses between the two cylinder banks. Unlike the factory exhaust, which provides limited crossover interaction, the Kline design improves exhaust gas balance while creating a sharper, higher-pitched exhaust note.

The result is a more engaging soundtrack that remains relatively controlled during normal cruising but becomes increasingly aggressive under acceleration and at higher engine speeds.

Kline's harmonically tuned free-flow silencers further refine the exhaust's acoustic characteristics. Rather than simply increasing volume, the system is designed to minimize unwanted low-frequency resonance while emphasizing the more desirable frequencies of Porsche's turbocharged flat-six engine.

This approach creates a distinctive performance exhaust note without the excessive bass-heavy drone commonly associated with less sophisticated aftermarket systems.

The Kline 997.1 Turbo exhaust is available in two premium materials.

304 Stainless Steel provides excellent durability, corrosion resistance, and performance at a more accessible price point. This configuration is ideal for owners seeking Kline's signature sound and engineering without the additional cost of exotic materials.

Inconel 625 represents Kline's ultimate lightweight exhaust construction. Widely used in aerospace and motorsport applications, this nickel-based superalloy offers exceptional high-temperature strength, allowing Kline to manufacture exhaust components with significantly thinner walls.

The result is substantial weight savings compared with conventional stainless-steel construction, along with a distinctive metallic exhaust character.

Kline reports that its Inconel catless exhaust configuration weighs approximately 7.2 kg (15.9 lb), compared with approximately 12.5 kg (27.6 lb) for the stainless-steel catless configuration.

For owners who prefer to retain catalytic converters, the exhaust can be configured with 200-cell high-flow sport catalysts. These reduce exhaust restriction compared with the original factory catalytic converters while providing a more aggressive exhaust soundtrack.

For dedicated off-road and closed-course competition applications, Kline also offers a catless configuration that eliminates the catalytic converter substrates for maximum exhaust flow and sound.

Kline reports performance improvements of up to 42 horsepower and 65 Nm of torque with its catless exhaust configuration. When combined with supporting ECU software, Kline reports gains of up to 75 horsepower and 102 Nm of torque.

These figures represent manufacturer-reported results for the specified configurations and should not be interpreted as guaranteed gains from the rear exhaust alone.

The exhaust features carefully selected tubing diameters, including a 70mm outer-diameter catless section and 63mm outer-diameter silencer section, designed to balance exhaust flow, turbocharger response, and power delivery.

Kline also offers optional equal-length performance exhaust manifolds for owners seeking a more comprehensive upgrade. These manifolds are designed to improve exhaust pulse timing and turbocharger response while complementing the company's performance exhaust system.

For enthusiasts looking to extract more performance from the Mezger engine, the combination of a Kline exhaust, upgraded manifolds, and appropriate ECU calibration provides a strong foundation for a comprehensive performance package.

Whether selecting stainless steel for its excellent value or Inconel 625 for maximum weight reduction, the Kline Innovation Performance Exhaust System delivers premium craftsmanship, improved exhaust flow, and a distinctive high-pitched soundtrack that transforms the character of the Porsche 997.1 Turbo.

Fitment Notes

  • Fits 2006–2009 Porsche 911 Turbo (997.1)

  • Engine: 3.6L Twin-Turbocharged Mezger Flat-Six

  • Compatible with Coupe and Cabriolet body styles, subject to vehicle-specific confirmation

  • Designed specifically for the first-generation 997 Turbo exhaust configuration

  • Available in 304 stainless steel or Inconel 625

  • Available with 200-cell sport catalytic converters or catless replacement pipes

  • Features Kline's signature laminar-flow X-pipe

  • Replaces the applicable factory rear exhaust and catalytic converter sections according to the selected package

  • Optional Kline equal-length exhaust manifolds available separately

  • Optional carbon fiber exhaust tips may be available depending on configuration

  • Factory turbocharger compatibility should be confirmed for modified vehicles

  • Not intended for 997.2 Turbo or Turbo S without selecting the appropriate second-generation system

  • Porsche 997 GT2 compatibility requires separate manufacturer confirmation

  • Not intended for naturally aspirated 997 Carrera models

  • 200-cell sport catalytic converters are not automatically emissions-certified for public-road use

  • Catless configurations are intended for off-road and closed-course competition use only

  • ECU calibration may be necessary depending on the exhaust configuration and supporting modifications

  • Professional installation recommended

Included

Selected Exhaust Configuration:

  • Kline Innovation performance rear exhaust assembly

  • Integrated harmonically tuned silencer section

  • Kline 1D CLR laminar-flow X-pipe

  • Selected 200-cell sport catalytic converter pipes or catless replacement pipes, when purchased as a complete package

Available Material Options:

  • 304 Stainless Steel

  • Inconel 625

Available Catalyst Configurations:

  • 200-Cell High-Flow Sport Catalysts

  • Catless Replacement Pipes

Product Specs

  • Manufacturer: Kline Innovation

  • Product Name: Porsche 997.1 Turbo Performance Exhaust System

  • Vehicle Application: Porsche 911 Turbo (997.1)

  • Model Years: 2006–2009

  • Engine: 3.6L Twin-Turbocharged Flat-Six

  • Exhaust Type: Performance Exhaust System

  • Exhaust Design: Harmonically Tuned Free-Flow

  • X-Pipe: Kline 1D CLR Laminar-Flow

  • Material Options: 304 Stainless Steel / Inconel 625

  • Catalyst Options: 200-Cell Sport Catalysts / Catless Pipes

  • Catless Section Diameter: 70mm OD

  • Silencer Section Diameter: 63mm OD

  • Stainless Steel Weight with 200-Cell Cats: 14.5 kg (32.0 lb)

  • Stainless Steel Weight, Catless: 12.5 kg (27.6 lb)

  • Inconel Weight, Catless: 7.2 kg (15.9 lb)

  • Inconel Weight with Catalysts: Approximately 10.2 kg (22.5 lb), Manufacturer-Listed Configuration

  • Manufacturer-Advertised Catless Power Gain: Up to 42 HP

  • Manufacturer-Advertised Catless Torque Gain: Up to 65 Nm

  • Manufacturer-Advertised Gain with Supporting Software: Up to 75 HP

  • Manufacturer-Advertised Torque Gain with Software: Up to 102 Nm

  • Manufacturer Part Number: Varies by Selected Configuration

Product Features

  • Signature Kline laminar-flow X-pipe balances exhaust pulses between cylinder banks to create a sharper, higher-pitched Porsche flat-six soundtrack.

  • Harmonically tuned free-flow silencers deliver aggressive sound under acceleration while helping minimize unwanted low-frequency cabin drone.

  • Available Inconel 625 construction provides exceptional high-temperature durability and substantial weight savings compared with stainless-steel exhaust construction.

  • 200-cell sport catalyst or catless configurations allow customers to select the appropriate exhaust setup for their intended application.

  • Manufacturer-reported performance gains of up to 42 HP and 65 Nm with the catless configuration, with additional gains possible when combined with supporting ECU software.

  • Engineered specifically for the 997.1 Turbo Mezger engine, with optimized tubing diameters and optional equal-length manifolds for comprehensive performance upgrades.