SKU: 54462552983

Stillen 2009-2013 Infiniti G37 Sedan, 2015 Q40 Stainless Steel Cat-Back Exhaust System - 504377

Sale price$683.05 Regular price$758.94
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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22

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Description

Stillen 2009-2013 Infiniti G37 Sedan, 2015 Q40 Stainless Steel Cat-Back Exhaust System - 504377Product Features 304 Stainless Steel Construction Fits RWD & AWD Models Polished 304SS Dual Wall Tips Authoratative Tone Under Throttle BENEFITS 19 WHP Increase (horsepower to the wheels)* Gain Torque* Mild note at idle; Cruising Aggressive note under throttle Compliments the factory exhaust cut out nicely Perfect solution for those who value a more luxurious and quiet cabin feel along with enhanced sound. Delivers an aggressive look that matches the

Product Features

  • 304 Stainless Steel Construction
  • Fits RWD & AWD Models
  • Polished 304SS Dual Wall Tips
  • Authoratative Tone Under Throttle

BENEFITS

  • 19 WHP Increase (horsepower to the wheels)*
  • Gain Torque*
  • Mild note at idle; Cruising- Aggressive note under throttle
  • Compliments the factory exhaust cut out nicely
  • Perfect solution for those who value a more luxurious and quiet cabin feel along with enhanced sound.
  • Delivers an aggressive look that matches the enhanced exhaust note.

*Results May Vary!

2009-2013 Infiniti G37 Sedan, 2015 Q40 Stainless Steel Cat-Back Exhaust System - 504377

Increase performance with the STILLEN Cat Back Exhaust for Infiniti G35 and Infiniti Q40. This exhaust features a Dual split rear exit. This STILLEN Infiniti G35 Exhaust has dual polished tips. The G35 Exhaust improves the sound and increases the performance of the vehicle.

STILLEN's Cat-Back Exhaust System helps drum up substantial horsepower and torque, giving your G37 the extra edge of performance. This Cat-Back Exhaust System is a true Cat-Back System, and is crafted of Mandrel-bent Stainless Steel for a long service life. At idle the STILLEN Exhaust is unobtrusive, and at higher speeds or under throttle, STILLEN's recognizable, performance sound is evident. This is a pleasing tone, authoritative and yet responsible. Not only does this exhaust system have a sharp, show ready look, but it also offers impressive horsepower and torque gains as well as a lifetime warranty and is easy to install.

STILLEN's Cat-Back Exhaust for the Infiniti G37 is built for power. Power that you can feel across the power band with a big gain on top. Mileage gains during highway travel can be expected as you cruise at steady speeds. The free flowing performance mufflers and tips are made out of polished stainless steel for long life. The Stillen fit and finish is second to none. The improved airflow created by the addition of the exhaust is verified by the significant dyno HP increase.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 54462552983

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4.8 ★★★★★
Based on 25 reviews
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H
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Herman D.
Massapequa, US
★★★★★ 5
Gets the job done.
Size: Large, Color: Deep Blue, Size: Large, Color: Deep Blue
Better than I expected (for a last minute buy). Looks great after I steamed it. Not the most durable, but a solid piece for the price. Thick and breathable material. I’m a 42R and the fit was perfect with no alterations needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2026
S
Verified Purchase
SleepyBoy
Whiting, US
★★★★★ 4
Great fitting suit!
Size: X-Small, Color: Deep Grey (Stretch Fabric)
If you’re 5’8” 145lbs this review may help! I’m 12-14% BF, range 142-150lbs, 28-30” waist. I wear 30” inseam for pants, 40R suit but can fit 39R, 15/32 slim fitted dress shirts, small to medium fitted T shirts. I love the fit of the suit. The grey color and the texture of the fabric could be a little better. Seems the fabric isn’t a solid consistent look. A little textured I suppose. The jacket fits well and I love the stretch fabric for the armpit area. Makes it easy to put on and move around while giving a good fit. I think a little bit more room in the shoulders would be nice. The cut is a little off for me in the back of the jacket by the neck area. The vest seemed a little large but has an adjustable strap in the back. For the jacket pockets, you’ll have to carefully cut and pull the threads at the opening since they are sewn shut. I did notice a little wrinkling to the side front near the serratus. Could be the cut. For me if it was a little roomier by chest and tappered in more it would fit better. The joint where the sleeves meet the shoulder are OK. There are some wrinkles there due to imperfection with stitching. The sleeves come down past my wrist a little. My arm-span is square with my height for reference. If you have big biceps it might be a little tight. The pants fit perfectly for me. Good length with no excessive break when not wearing shoes. There’s some excessive break when wearing higher profile shoes. The stretch waist is nice for when you decide to eat and drink too much and still comfortable while sitting. I’ve not found a slim fitted suit like this before. Comfortable to dance around in also. If you have thick thighs it might feel a little tight. Wore the suit to a wedding and it was great. Can’t really complain for the price. Good luck!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2025
Q
Verified Purchase
Q21
West Palm Beach, US
★★★★★ 5
Tie color, general review
Size: Small, Color: Grey
Great quality, love the thickness of the suit wearing it in the summer it wasn’t hot. Nice buttons, love the small extra gift. Would prefer a neutral colored tie that could go with anything rather than the red and white striped they offered with the suit. Pants fit a bit bigger, had to adjust it to my measurements but, all by all a good purchase!
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Reviewed in the United States on July 19, 2025
P
Verified Purchase
Phil D
Alexandria, US
★★★★★ 3
Nice material, stitching. Fit was unorthodox.
Size: Small, Color: Light Grey (Stretch Fabric)
putting on the suit for the first time, pants first, I thought that I had gotten a steal of a deal! The fabric was of good quality, had a good amount of stretch and was just long enough for my long legs. (typically wear a 32/34, but cuff the jeans once). It was the top section that I had an issue with. The shape of the shoulder-to-neck area was very pointed. As someone that has almost no trap muscle, this meant extra fabric that sagged on the my shoulders and gave me an unkempt look and I'm not sure this is something that a tailor can fix easily. If you have a little more beef up top, this would probably work for you. I wish it would have fit differently because I was impressed by the quality.
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Reviewed in the United States on October 31, 2023
D
Verified Purchase
demetrius george
Boise, US
★★★★★ 1
Do not waste your time
Size: 3X-Large, Color: Black
Wow! Lol extremely disappointed. I ordered this suit based off of the size chart and my accurate measurements. It was EXTREMELY small. So small that I could barely get my forearm through one sleeve. Not even close to my measurements. And to top it off, it was delivered in a clear bag, exposing the contents to the carrier and possible package thieves. So unprofessional.
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Reviewed in the United States on April 14, 2026

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