Invidia HS12LGSG3H Q300 Axle-Back Exhaust for 2013-16 Lexus GS350 V6

Vehicle Fitment

• 2013-2016 Lexus GS350 (3.5 L V6, AWD/RWD, Sedan) - Fitment confirmed for GS350 models; 2017+ unconfirmed at time of listing.

Features

• Invidia Q300 axle-back exhaust system engineered for enhanced exhaust flow
• Mandrel-bent SUS304 stainless steel piping for improved performance and durability
• Flat-bottom muffler design for better high-speed aerodynamics
• Dual tuned mufflers for a richer, sporty exhaust tone
• Direct bolt-on installation using OEM hanger locations
• Optimized back pressure for stronger throttle response
• Polished stainless steel construction with CNC-machined flanges
• Robot TIG welding for long-lasting, leak-resistant joints

Specifications

• Part Number: HS12LGSG3H
• Series: Invidia Q300 Axle-Back
• Primary Material: SUS304 stainless steel
• Piping Diameter: ~70 mm (2.75")
• Fitment: 2013-2016 Lexus GS350 V6 AWD and RWD sedans
• Exit Configuration: Straight axle-back design (no mid-pipe)
• Installation: Direct bolt-on using factory hangers
• Sound: Deeper, sporty exhaust note with improved flow

Included Components

• 1x Invidia Q300 axle-back exhaust assembly (HS12LGSG3H)
• 1x Set of installation gaskets
• 1x Bolt and hardware kit

Product Description

The Invidia HS12LGSG3H Q300 Axle-Back Exhaust is designed to upgrade the rear exhaust system on 2013-2016 Lexus GS350 V6 sedans. Constructed from high-quality SUS304 stainless steel with mandrel-bent piping, this axle-back system enhances exhaust flow and reduces back pressure compared to the stock mufflers, resulting in stronger throttle response and a deeper, more engaging exhaust tone. Its flat-bottom muffler increases aerodynamic efficiency and the tuned mufflers deliver a rich, sporty sound without sacrificing daily drivability.

Installation is direct bolt-on using factory hanger locations and the included hardware, making fitment straightforward for experienced installers and performance enthusiasts. Built with precision CNC-machined flanges and robot TIG welding, the HS12LGSG3H offers durable, long-lasting performance while improving the rear aesthetic of your GS350. The axle-back design does not include a mid-pipe or tips, so factory tips are reused. Fitment is confirmed through the 2016 model year; compatibility for 2017 and newer models is unconfirmed at the time of listing.