PLEASE NOTE: As of August 1, 2023 our Windsor location will no longer be open for Walk-In Traffic or Pickups

877.352.5355 Contact Us Mon-Sat 10a-6p

Pypes Exhaust X-Pipe Kit Intermediate Pipe 99-04 Mustang 2.5 in w/Cats Hardware Incl Natural 304 Stainless Steel Exhaust XFM36E

Pypes Exhaust X-Pipe Kit Intermediate Pipe 99-04 Mustang 2.5 in w/Cats Hardware Incl Natural 304 Stainless Steel Exhaust XFM36E
$1,689.99 kt
NEWARRIVING SOONEstimated Ship Date 12/21/2023 (If Ordered Today)12 available from PYPES EXHAUST as of 12/02/2023
Model: 3958347
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.

These EPA compliant catalytic converters are the best in the market in terms of performance, design, and longevity. Expect more power, improved MPG, superior emissions, and improved sound control.

These converters are a made from a high quality 304 grade stainless steel. The ceramic substrate is a durable factory style design (300 cell ceramic honeycomb). These converters feature a 2.5 inch slip fit design with an overall length of 11 inch. The overall diameter is 4 inch.

  • 409 stainless steel
  • 2.5 inch mandrel bent pipe
  • Comes with catalytic converters
  • EPA Compliant
  • USA Made
  • Stainless Steel Construction
  • High Platinum Load
  • O2 Bung Equipped
  • More Horsepower and Torque
  • Increased Fuel Economy
  • Lower Emissions
  • Better Sound Control

A tune needs to be done when changing catalytic converters
Rich conditions, unburnt fuel getting into the converters, or oil getting into the converters can cause converter failure and is not covered under the warranty.

About Pypes Performance Exhaust

One of the principal ways of getting a lot of bang for your performance buck is to replace your car’s compression-bent exhaust system with a mandrel bent system.  The simple fact is that a mandrel bent exhaust system will flow twice as efficiently as a compression-bent system and we all know that efficient flow is one of the main ingredients of power.

Pypes Performance Exhaust supplies complete mandrel bent, performance exhaust systems for American performance vehicles ranging from the 1950’s to the present day.  We also offer both gas and diesel truck systems for the most popular American Pick-Up Trucks!

Our systems and accessories are fabricated using stainless steel materials that will provide their owners with long term service and satisfaction……and, Pypes products are backed by our limited lifetime warranty!  Most of our systems include a custom designed X-Pipe at a considerably lower price than others that include no crossover at all or just a basic balance tube with their systems.  A typical Pypes’ “complete system” will include an X-Pipe, a pair of mufflers, a set of tailpipes and all of the clamps and hangers required to install the system.

Pypes also performance matches systems with a choice of their own distinct mufflers to best suit your horsepower and sound requirements, rather than forcing you to buy one type of technology that may not be best for your application.

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years
Ford Mustang GT Bullitt 2001
Ford Mustang GT 1999 - 2004
Ford Mustang Mach 1 2003 - 2004
Ford Mustang SVT Cobra 10th Anniversary 2003
Ford Mustang SVT Cobra R 2000
Ford Mustang SVT Cobra 1999 - 2004
Ford Mustang 1999 - 2004


Core Substrate Material Ceramic
Diameter 2.5 Inch
Hardware Included Yes
Manufacturer Warranty Limited Lifetime
Material 409 Stainless Steel
Pipe Type X-Pipe
Vehicle Type Car


Write a Review
* Your Name:
* Email (This will not be displayed)
* Rating:

Ask a question about

Pypes Exhaust X-Pipe Kit Intermediate Pipe 99-04 Mustang 2.5 in w/Cats Hardware Incl Natural 304 Stainless Steel Exhaust XFM36E:
Mustang Depot 2023