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2004+ Custom Enterprise SS Y-Pipe Review

Recently we tested CustomEnterprises 1995-99 Ypipe system, which proved to be really well constructed and designed. For our next test we are going to see how well they have kept to their attention to detail with their 2004+ Ypipe System. Although with the 2002+ Maxima's the most beneficial result would be to swap out the entire header/ypipe system CE has given the option of swapping out a somewhat significant part of that system. With its Mandrel bent curves, 100% stainless steel design, and evenly weaved flex section this pipe was sure to do what it was made for. To make things flow even better, we are pairing a Greddy SP2 catback system to ensure maximum output from our VQ Motor. Read on and see if CustomEnterprises Y-pipe really does ensure "a smooth even flow”.


Basing our review from a factory Ypipe, there is a noticeable absence of one flex section for a slightly longer single flex, removed pre-cat, and also clean mandrel bent curves. We are also going to note the cleanly done flex section displayed in the pictures above. As you can see the flex section weaves are visually thicker on the pipe then that of the Stock.




Noticeable power enhancement throughout the power band (mostly in the upper section).
Stainless Steel Material
Thick weave in flex section
Idle has a slightly deeper tone




Slight misalignment of front bank lowest flange bolt hole.
Inability to use factory catalyst mounting bolts.




  • 2004-06 4spd Auto/6spd Manual Nissan Maxima

Additional Note:
  • There is also a reminder to those looking to purchase a CE ypipe, there is a slight difference in the length/design on the 4spd auto/6spd manual and the newer 5spd auto transmissions. Please be aware of which one you are purchasing

Part Number Information:

  • 2004-2006 Maxima Stainless Steel Y-Pipe

Where To Purchase:

  • Custom Enterprise Stainless Steel Y-pipe

    CustomMaxima: (800) 806-5798

    Sales Department

Tools Required for Installation:

  • Sockets and Wrenches
  • Breaker Bar
  • Jack Stands
  • WD-40/Liquid Wrench
  • Anti-seize
Installation Process:


Accidents happen, PLEASE USE CAUTION, allow the exhaust system to cool before working on the car.
Get the car up enough on your jack stands or lift so that their is enough room to pull the factory pipe out from under the car. Spraying some Liquid Wrench or Wd-40 onto all of the 13 bolts we are going to be working with on this install will ease the removal process. These bolts haven't been touched since the car had been manufactured so they will be a little tough. Remove the heat shield covering the front header to expose the front ypipe portion a little better (not shown). Remove the 12 bolts securing the factory Y-pipe to the headers and cat. Before the whole system can come down you must first remove the center bracket assembly which is held to the body with two(2) 14mm bolts, then the whole piece should come down with a slight tug.




Now that you've successfully removed your factory ypipe (wasnt too bad, huh?) you may begin swapping over gaskets/replacing gaskets and bring that new setup under the car. I would suggest starting out with the rear bank first and finishing off with the ypipe/cat connection. Reason being is because the system is so tightly constructed there is no room for adjustment and installing the front bank first would result in.. (see picture). Secure the front two flanges, rear ypipe/cat flange, and finish off with the factory bracket. Mission Complete...


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