Soul Side Muffler Bypass Kit for Porsche 991 GT3 & GT3 RS (2014–2019)

Description

Upgrade your Porsche 991 GT3 / GT3 RS / 911 R (2014–2019) with this premium valved side muffler bypass system from SOUL Performance Products. Designed for maximum performance and sound refinement, the kit sheds approximately 35 pounds of weight, improves under-hood heat management, and delivers a more aggressive exhaust note—while retaining full valve functionality for daily driving comfort.

Fitment Notes

• Fits all Porsche 991.1 / 991.2 GT3, GT3 RS and 911 R models (2014–2019).

• Retains factory exhaust valves for selectable sound profiles.

• Direct bolt-on installation; no cutting or fabrication required. 

• Designed for performance driving—reduces rear-tire heat and improves flow when valves are open.

Included

• Pair of valved bypass pipes (left & right) replacing side muffler section.

• Mandrel-bent T304L stainless steel tubing and high quality flex bellows.

• All required mounting hardware and gaskets for installation.

• Detailed installation instructions and SOUL Lifetime Warranty documentation.

Product Specs

• Construction: T304L stainless steel, 3″ (76 mm) diameter primary piping with 0.065″ wall thickness.

• Weight savings: Approximately 35.4 lbs (16 kg) lighter than factory side muffler assembly (44.9 lbs → 9.5 lbs) 

• Sound profile: Quiet/comfortable with valves closed; aggressive exotic tone when valves open.

Product Features

• Massive Weight Reduction: 35 lb+ weight drop improves rear axle unload, handling and agility.

• Improved Heat Management: Bypassing the mufflers lowers heat build-up under the rear bumper and around rear tires.

• Selectable Sound: Factory valves retained—comfortable tone for street driving, full performance sound when opened.

• High-Flow 3″ Piping & Flex Bellows: Enhanced flow and durability under aggressive driving.

• Premium Build Quality: Crafted in-house in SOUL’s facility (Willow Grove, PA) with T304L stainless and precision manufacturing.

• Lifetime Warranty: Purchase with confidence knowing it’s covered for street and track.

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