STILLEN Product Announcement: STILLEN Cat-back Exhaust for 16+ Infiniti Q50 Silver Sport and Red Sport 3.0T

STILLEN Product Announcement: STILLEN Cat-back Exhaust for 16+ Infiniti Q50 Silver Sport and Red Sport 3.0T

STILLEN Cat-back Exhaust for the 2016+ Infiniti Q50 Silver Sport and Red Sport


(p/n 504450, 504451, 504452)

It’s no secret that turbocharged engines thrive when allowed to breathe. Naturally-aspirated engines rely on some back pressure to create a scavenging effect to help maintain exhaust gas velocity. By contrast, turbocharged engines and particularly, the turbocharger(s), function most efficiently when the exhaust offers the least amount of possible resistance.

504450_IMG_01_2016_UP_Infiniti_Q50_carbon 504450_IMG_02_2016_UP_Infiniti_Q50_carbon

When Infiniti released the Q50 and Q60 with its new twin-turbocharged VR30DDTT engine, a new chapter in the performance passenger car segment had begun. Drawing on its experience with the VR38 engine that powers the mighty GT-R, the sturdy and underrated VR30 engine relies on its twin Garrett turbochargers to generate boost pressure. When allowed to breathe, the turbochargers really come to life.


STILLEN’s recently developed Short Ram Intake System (p/n 402856 & 402856DF) has already proven to help produce incremental gains of over 20 horsepower and 33 lb-ft torque to the wheels. Employing years of engineering and manufacturing experience, along with hours of testing on its in-house Dynojet Dynamometer, STILLEN proudly presents its Cat-back Exhaust System for the 2016+ Infiniti Q50 3.0T.


In the quest for the greatest gains possible, STILLEN engineers worked tirelessly to optimize this exhaust system. After several design revisions and numerous prototypes later, this Cat-back Exhaust improved output with a best incremental gain of 21.37 horsepower at 4,750RPM and 23.94 lb-ft torque at 4,780RPM.


Q50 Exhaust WHP

Peak Power: 370.86 whp @ 6,380 RPM

Greatest Incremental Horsepower gain: 21.37 whp @ 4,750 RPM

Q50 Exhaust TQ

Peak Torque: 350.67 lb-ft @ 4,810 RPM

Greatest Incremental Torque gain: 23.94 lb-ft @ 4,780 RPM


The STILLEN Cat-Back Exhaust System features T-304 stainless-steel construction for corrosion resistance and durability, along with slip fit connectivity for weight reduction. The 3-inch mid-pipe mates to the catalytic converter and splits into two 2.5-inch axle-back mufflers. The mufflers terminate in your choice of three different exhaust tip finishes, including carbon fiber (p/n 504450), stainless steel (p/n 504451) and burnt stainless steel (p/n 504452). The bolt-on exhaust tips enable you to adjust the tip position for a proper fit no matter what bumper or aero you choose to run at the back. You can also purchase the other tips separately in the case that you want to change up the look of your exhaust.


The STILLEN Cat-back Exhaust for the Q50 is available with the Carbon-fiber tips (p/n 504450, shown) as well as stainless steel (p/n 504451) and burnt stainless steel (p/n 504452) finishes.

STILLEN proudly engineers and manufactures its products in the USA at its facilities in Southern California.

Ready to give your Q50 / Q60 Silver Sport or Red Sport more power and a sportier exhaust note? Reach out to us at 866-250-5542, by email at or via live chat at! Order yours Today!