Porsche 991.1 / 991.2 Turbo / Turbo S SOUL Sport Catalytic Converters

Product Description

The SOUL Sport Catalytic Converters are a direct bolt-on performance upgrade for the 2013–2019 Porsche 991.1 and 991.2 911 Turbo / Turbo S, replacing the restrictive factory catalytic converters with premium high-flow catalyst assemblies designed to improve exhaust flow, turbocharger sound, throttle response, and performance while retaining a catted exhaust configuration.

Positioned immediately downstream of the turbochargers, the factory catalytic converters are one of the primary restrictions in the 991 Turbo exhaust system. SOUL's freer-flowing catalysts reduce this restriction while allowing significantly more of the turbochargers' natural spool and turbine sound to pass through the exhaust.

Unlike completely catless bypass pipes, the Sport Catalytic Converters retain catalytic-converter functionality and were specifically developed by SOUL to deliver increased performance without catalyst-related check engine lights under normal operating conditions.

The SOUL assemblies weigh approximately 11.6 lbs compared with 16 lbs for the factory components, reducing exhaust-system weight by approximately 4.4 lbs / 2.0 kg.

FITMENT:

• Fits 2013–2016 Porsche 991.1 911 Turbo

• Fits 2013–2016 Porsche 991.1 911 Turbo S

• Fits 2017–2019 Porsche 991.2 911 Turbo

• Fits 2017–2019 Porsche 991.2 911 Turbo S

• Fits 2018 Porsche 991.2 911 Turbo S Exclusive Series

• Fits Coupe and Cabriolet applications where offered

• SOUL specifies fitment for all Porsche 991.1 and 991.2 Turbo vehicles

• Compatible with the factory rear exhaust

• Compatible with the SOUL X-Pipe Exhaust

• Compatible with the SOUL Valved Exhaust System

• Compatible with applicable SOUL 991 Turbo exhaust packages

DETAILS:

• Pair of high-flow Sport Catalytic Converters

• Replaces the restrictive factory catalytic-converter assemblies

• Retains a catted exhaust configuration

• Premium high-flow catalyst elements

• Designed to increase post-turbo exhaust flow

• Designed to improve throttle response

• Increases audible turbocharger spool and turbine sound

• Increases overall exhaust character

• Designed to provide additional performance without catalyst-related check engine lights

• SOUL assemblies weigh approximately 11.6 lbs / 5.3 kg

• Factory catalyst assemblies weigh approximately 16 lbs / 7.3 kg

• Saves approximately 4.4 lbs / 2.0 kg

• Approximately 27.5% lighter than the factory components being replaced

• Constructed from .065-inch-wall T304L stainless steel

• Smooth mandrel-bent tubing

• Thick exhaust flanges

• Fixture-tested prior to shipment

• Installation hardware included

• Detailed installation instructions included

• Direct bolt-on installation

• No catalyst variants

• No tip variants

• No transmission variants

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

HIGH-FLOW CATALYTIC CONVERTERS

The factory catalytic converters are positioned immediately downstream of the 991 Turbo's turbochargers.

This location makes catalyst flow particularly important because the turbine must discharge its exhaust gases directly into the catalyst section.

SOUL replaces the restrictive factory assemblies with premium high-flow catalytic converters designed to reduce post-turbine restriction while maintaining catalysts in the exhaust system.

Potential benefits include:

• Increased exhaust-flow capacity

• Improved throttle response

• Increased turbocharger sound

• Greater performance potential

• Stronger exhaust character

• Retained catalytic converters

• Fewer diagnostic compromises than a completely catless configuration

REDUCED POST-TURBO RESTRICTION

Exhaust restriction downstream of a turbocharger creates pressure against which the turbine must discharge.

Reducing this restriction can improve the overall efficiency of the exhaust path and provide additional flow capacity as engine output increases.

The Sport Catalytic Converters address one of the largest restrictions in the factory system without eliminating the catalysts entirely.

This becomes increasingly valuable as the vehicle receives modifications such as:

• ECU tuning

• Increased boost

• Intake upgrades

• Intercooler upgrades

• Freer-flowing rear exhaust components

• Turbocharger upgrades

INCREASED THROTTLE RESPONSE

SOUL specifically identifies improved throttle response as one of the benefits of the Sport Catalytic Converters.

Reducing restriction immediately after the turbochargers allows the exhaust system to respond more freely as engine load changes.

The improvement can become particularly noticeable when the Sport Cats are paired with additional performance modifications.

INCREASED TURBOCHARGER SOUND

One of the most noticeable changes from replacing the factory catalysts is increased audible turbocharger activity.

Expect more:

• Turbo spool

• Turbine whistle

• Boost-related exhaust sound

• Throttle-related acoustic feedback

• Mechanical turbocharger character

The factory catalyst substrates suppress a substantial amount of this sound before it reaches the rear exhaust.

The freer-flowing SOUL catalysts allow considerably more of it to pass through.

EXHAUST SOUND

The Sport Catalytic Converters also allow more of the 3.8L twin-turbo flat-six exhaust character to reach the rear of the vehicle.

Compared with the factory catalysts, expect:

• Greater turbocharger presence

• More exhaust texture under load

• Stronger acceleration sound

• Increased high-RPM presence

• More audible throttle transitions

• Greater deceleration character

The overall increase in volume will depend heavily on the rear exhaust installed behind the Sport Cats.

WITH THE FACTORY REAR EXHAUST

The Sport Catalytic Converters can be installed while retaining Porsche's original rear exhaust.

This is the most conservative configuration and provides:

• Reduced catalyst restriction

• Increased turbocharger sound

• Improved throttle response

• Retained factory rear exhaust

• Retained factory exterior appearance

• More restrained overall volume than a complete aftermarket exhaust system

This makes the Sport Cats a logical first-stage modification for an otherwise-stock 991 Turbo.

WITH THE SOUL X-PIPE EXHAUST

Pairing these Sport Catalytic Converters with SOUL's rear X-Pipe creates a much more comprehensive catted performance exhaust system.

The combination provides:

• High-flow catalysts

• Full 3-inch rear exhaust architecture

• Proprietary X-pipe mixing chamber

• Quad race resonators

• Increased turbocharger sound

• Increased overall exhaust volume

• Greater rear weight reduction

This combination is effectively the component architecture behind SOUL's complete Sport X-Pipe Exhaust System.

WITH THE SOUL VALVED EXHAUST

The Sport Catalytic Converters can also be paired with SOUL's Valved Exhaust System.

This creates a high-flow catted setup while adding active sound control.

The complete configuration provides:

• High-flow catalytic converters

• Aggressive valves-open exhaust path

• Quieter resonated valves-closed path

• Increased turbocharger sound

• Remote valve control

• HomeLink integration capability

This is particularly attractive for owners who want increased flow without giving up the ability to substantially reduce exhaust volume when desired.

SPORT CATS VS. FACTORY CATALYSTS

Factory Catalytic Converters

• Original Porsche emissions hardware

• Greater exhaust restriction

• Greater turbocharger sound attenuation

• Approximately 16 lbs

SOUL Sport Catalytic Converters

• Premium high-flow catalyst assemblies

• Reduced post-turbo restriction

• Increased turbocharger sound

• Improved throttle response

• Approximately 11.6 lbs

• Approximately 4.4 lbs lighter

• Developed for catalyst-related CEL-free operation

SPORT CATS VS. CAT BYPASS PIPES

SOUL Sport Catalytic Converters

• $3,695.00

• Retain catalytic converters

• High-flow catalyst elements

• Approximately 11.6 lbs

• Saves approximately 4.4 lbs

• Increased turbo sound

• Improved throttle response

• Developed to avoid catalyst-related CELs under normal operation

• More conservative configuration

SOUL Cat Bypass Pipes

• $1,295.00

• Completely catless

• Straight-through exhaust path

• Approximately 6 lbs

• Saves approximately 10 lbs

• Greater turbocharger sound

• Lower catalyst-section restriction

• May trigger catalyst-related check engine lights

• Competition / off-road-oriented configuration

For customers who want improved flow and sound while retaining catalysts, the Sport Catalytic Converters are the more appropriate option.

4.4-LB WEIGHT REDUCTION

SOUL publishes the following weights:

Factory Catalytic Converter Assemblies:
Approximately 16 lbs / 7.3 kg

SOUL Sport Catalytic Converters:
Approximately 11.6 lbs / 5.3 kg

Weight Savings:
Approximately 4.4 lbs / 2.0 kg

That represents approximately a:

27.5% reduction

in the weight of the catalyst assemblies being replaced.

DESIGNED FOR CEL-FREE OPERATION

SOUL specifically developed the Sport Catalytic Converters around increasing flow without creating the catalyst-monitoring problems associated with fully catless pipes.

SOUL describes the product as providing:

Added performance without a check engine light.

For DasMotoring purposes, this should be treated as the manufacturer's intended operating behavior rather than an unconditional guarantee for every vehicle.

Diagnostic behavior can still potentially be influenced by:

• Oxygen-sensor condition

• ECU software

• Vehicle condition

• Additional modifications

• Catalyst condition over time

NO ECU TUNE REQUIRED

SOUL does not specify ECU tuning as a requirement for installation of the Sport Catalytic Converters.

They are designed as a direct bolt-on hardware upgrade.

A performance calibration may still provide additional gains by taking advantage of the increased exhaust-flow capacity, but tuning is not required simply to install the catalysts.

NO PUBLISHED STANDALONE DYNO NUMBER

SOUL describes the Sport Catalytic Converters as providing a significant increase in power along with improved throttle response and sound.

However, the current product page does not publish a controlled factory-catalyst versus Sport-Catalyst dyno comparison.

DasMotoring therefore does not advertise a specific horsepower or torque increase from this product alone.

CURRENT CATALYST SPECIFICATION

SOUL's current product page describes these assemblies as using:

Premium high-flow catalysts

but does not currently publish:

• Catalyst cell count

• Catalyst manufacturer

• Substrate material

• Precious-metal loading

DasMotoring therefore does not advertise any of those specifications unless confirmed for current production.

.065-INCH T304L STAINLESS CONSTRUCTION

Each Sport Catalytic Converter assembly is manufactured from:

.065-inch-wall T304L stainless steel

This provides:

• High-temperature durability

• Corrosion resistance

• Structural strength

• Consistent fabrication characteristics

• Long-term exhaust-system reliability

SMOOTH MANDREL BENDS

SOUL uses smooth mandrel-bent tubing to maintain a consistent internal flow area through the catalyst assemblies.

Maintaining tubing geometry through bends helps avoid unnecessary restrictions downstream of the turbochargers.

THICK EXHAUST FLANGES

The assemblies use substantial exhaust flanges designed to maintain alignment and sealing under repeated thermal cycling.

This is particularly important immediately downstream of the turbochargers, where temperatures can become extremely high.

FIXTURE-TESTED FITMENT

Every set is tested in a dedicated fabrication fixture prior to shipment.

This verifies:

• Flange position

• Exhaust alignment

• Downstream connection geometry

• Overall dimensional consistency

The assemblies are then quality checked and foam packed for shipping.

DIRECT BOLT-ON INSTALLATION

The Sport Catalytic Converters directly replace the factory catalyst assemblies.

SOUL includes:

• Left Sport Catalytic Converter

• Right Sport Catalytic Converter

• Installation hardware

• Detailed installation instructions

No cutting or welding is required during normal installation.

MODULAR 991 TURBO EXHAUST ARCHITECTURE

These Sport Catalytic Converters work particularly well within SOUL's modular 991 Turbo exhaust family.

An owner can combine them with:

• Factory rear exhaust

• SOUL X-Pipe Exhaust

• SOUL Valved Exhaust

allowing the exhaust system to evolve without necessarily replacing every component at once.

EMISSIONS NOTE

Although the Sport Catalytic Converters retain catalytic converters, they replace Porsche's original emissions hardware with aftermarket high-flow components.

SOUL states that this product is not CARB certified and may not be legal for use on emissions-controlled vehicles. SOUL identifies it as intended for off-road use.

Customers are responsible for determining whether their vehicle and complete exhaust configuration comply with applicable federal, state, and local regulations.