Stillen Performance Auto Parts

Stillen
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504455)
    1
    # mpn4533373532
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504455) by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. Instantly at start up, the Infiniti Red...
    $1,584.59
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504454)
    1
    # mpn4533373531
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504454) by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. Instantly at start up, the Infiniti Red...
    $1,697.78
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504453)
    1
    # mpn4533373530
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504453) by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. Instantly at start up, the Infiniti Red...
    $1,528.00
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504445)
    0
    # mpn4533373529
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. The Stillen exhausts for the Infiniti...
    $1,131.85
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504435)
    0
    # mpn4533373526
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. The Stillen exhausts for the 3rd Gen Infiniti...
    $1,131.85
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504402)
    0
    # mpn4533373525
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. Stillen has developed a new Infiniti G37...
    $1,579.65
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504377)
    2
    # mpn4533373522
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. Stillens Cat-Back Exhaust System helps drum up...
    $1,473.67
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504360D)
    0
    # mpn4533373520
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. StillenS exhaust for the G35 Coupe is the result...
    $1,579.65
  • Stillen® - Stainless Steel Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Cat-Back Exhaust System with Split Rear Exit (504350D)
    0
    # mpn4533373519
    Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. Enjoy improved performance, sound and even MPG...
    $1,343.14
  • Stillen® - Stainless Steel Near Cat-Back Exhaust System with Split Rear Exit
    Stillen®Stainless Steel Near Cat-Back Exhaust System with Split Rear Exit (504437)
    0
    # mpn4533373527
    Stainless Steel Near Cat-Back Exhaust System with Split Rear Exit by Stillen®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Exhaust System Sound: Aggressive / Loud. The Stillen exhausts for the Infiniti M35,...
    $1,149.73
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB12846MB)
    0
    # mpn4737639557
    Rear Diffuser (KB12846MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $356.67
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB26002MB)
    0
    # mpn4678835792
    Rear Diffuser (KB26002MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $409.30
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB25002MB)
    0
    # mpn4629002298
    Rear Diffuser (KB25002MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $253.92
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB31002MB)
    0
    # mpn4533373964
    Rear Diffuser (KB31002MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $254.22
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB13158MB)
    0
    # mpn4533373944
    Rear Diffuser (KB13158MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $367.17
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB13145MB)
    1
    # mpn4533373941
    Rear Diffuser (KB13145MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $376.33
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB12818MB)
    1
    # mpn4533373930
    Rear Diffuser (KB12818MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $317.03
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB127418MB)
    0
    # mpn4533373921
    Rear Diffuser (KB127418MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $317.02
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB11241MB)
    0
    # mpn4533373894
    Rear Diffuser (KB11241MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $321.86
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB11235MB)
    0
    # mpn4533373890
    Rear Diffuser (KB11235MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $362.11
  • Stillen® - Matte Black Rear Diffuser
    Stillen®Matte Black Rear Diffuser (KB11222MB)
    0
    # mpn4533373875
    Rear Diffuser (KB11222MB) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $321.86
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB12846)
    0
    # mpn4737639593
    Rear Diffuser (KB12846) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $327.43
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB26002)
    0
    # mpn4670062137
    Rear Diffuser (KB26002) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $350.82
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB31002)
    0
    # mpn4533373963
    Rear Diffuser (KB31002) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $256.39
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB25002)
    0
    # mpn4533373961
    Rear Diffuser (KB25002) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $253.92
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB13145)
    1
    # mpn4533373940
    Rear Diffuser (KB13145) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $303.23
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB12818)
    1
    # mpn4533373929
    Rear Diffuser (KB12818) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $252.33
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB127418)
    0
    # mpn4533373920
    Rear Diffuser (KB127418) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $252.33
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB11241)
    0
    # mpn4533373893
    Rear Diffuser (KB11241) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $252.25
  • Stillen® - Rear Diffuser (Unpainted)
    Stillen®Rear Diffuser (Unpainted) (KB11235)
    0
    # mpn4533373889
    Rear Diffuser (KB11235) by Stillen®. Ready to Prime and Paint. Personalize your ride with a Stillen rear diffuser! Stillen has been manufacturing polyurethane body styling parts for over 30 years. Stillen the experts when it comes to...
    Part Comes Pre-Installed with 3M Automotive Tape (Same as OEM uses)No Cutting or Modification to Bumper - Removable
    $298.05




Stillen is known for specializing in car and truck modding parts, including engine components, exhaust systems, superchargers and turbos, performance brake kits, coilover systems, exterior and interior accessories, and more. All of these parts and accessories are backed by the racing success of the company's founder, Steve Millen, who has been a professional racer for over 30 years. Beginning with 24 Hours of Daytona and ending with Nissan Prototypes at Le Mans, Steve has been victorious on racetracks the world over.

Steve Millen has captured several prestigious titles, including IMSA GT Driver's Championship, while being behind the wheel of his Nissan 300ZX Twin Turbo race car. His list of victories has earned him the title of being one of the most victorious drivers in IMSA GT history. And of course, this very legacy has brought Steve to test some of the finest and most powerful sports autos in the world, while developing his business in performance parts. For Stillen, this means engineering and manufacturing parts which are thoroughly tested and rigorously proven at the racetrack to work. Stillen constantly continues perfecting its existing parts.

There are plenty of automotive media, including Super Street, The Smoking Tire, DSport, AutoWeek, Automobile, Motor Trend, Road & Track, Car & Driver, and others, which have tested Stillen performance products and project autos and gave them excellent feedback. It is exactly the type of professional evaluation in real-world conditions that give Stillen a noteworthy edge over the competition with its products. Stillen superchargers will jam-pack your thoroughbred with plenty of fuel and air. Stillen intake systems will deliver plenty of fresh cool air in order for it to be mixed with racing gasoline and ignited. And Stillen exhaust will be as unrestrictive as possible, all in order to offer the maximum horsepower and torque gains!

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Stillen Reviews

30 reviews
I have a 2020 Maxima, 300 hp. Wanted a bit more. Toyed with the idea of getting the cat back exhaust. I did not expect much as the 2 Cats are the limiting factor in this exhaust. Product was of high quality. Welds looked good. I was too lazy to install myself so I had Midas do it for $165. Everything fit perfectly. Sound: At idle and crusing speed it has a low drone. Acceleration adds a crackling sound. Not too loud. Performance: Interesting result. The maxima has a CVT that has *fake* shift points upon maximum acceleration. The engine revs from about 5300RPM to 6100RPM and then goes back down the 5300 RPM for the next "shift". After I installed, I noticed the RPMs of the fake shift were higher. It now starts at about 5600 RPM and goes up to 6300 RPM. I assume the ECM senses less back pressure and is knows the torque band has moved into a higher RPM range and has adjusted accordingly. Enthusiasts HATE this ECM and blame it for sabotaging their performance add ons. In this case it seems to be working in concert with the Stillen exhaust. Observation: The car starts off as usual and then has increased power above 4000RPM. Is it dramatic? No. Is it noticeable? Yes. Did I put it on a dyno? No. A YouTube video shows a middle aged man explaining, installing and dyno testing his Stillen exhaust on a G37 3.2 engine. Similar to the Maxima engine. His dyno test showed 17 HP increase. he also had added a K&N air filter as I did. 15hp increase sound about right. Value: It cost about $1200 and it adds some power. Yes, it was worth it. Guys at Stillen and CarID were helpful.
Posted by Customer / October 07, 20222020 Nissan Maxima
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