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Pypes Catted X-Box Mid-Pipe (99-04 GT)

Item 387281
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases Power
      • Deep, Race Car Growl
      • X-Box Center Chamber Design
      • Full Tig-Welded and Mandrel-Bent
      • 2.5" 409 Stainless Steel Tubing
      • High Flow Ceramic Catalytic Converters
      • 49 State Street Legal
      • Fits 1999-2004 GT Mustangs


      More Power. Increase power and torque in your 99-04 GT Mustang by replacing the power robbing factory catalytic converters with a brand new Pypes Catted X-Box Mid-Pipe. The Pypes Catted X-Box is designed to offer increased horsepower and torque, as well as an even deeper sound dimension, when compared to your traditional X-pipe upgrade.

      Deep Race Car Growl. This free flowing Pypes X-Box for the New Edge GT will not only increase power as a result of its perforated X design within the center chamber and included ceramic catalytic converters, but it is certain to add a deep, race car growl to the sound of your exhaust.

      Durable Stainless Steel Construction. Pypes utilizes high-quality 16 gauge 409 stainless steel mandrel bent 2.5" tubing for increased exhaust flow and features fully Tig-welded reinforcement plates for additional strength. The included High Flow Ceramic Catalytic Converters far outperform the restrictive stock cats to provide a significant increase in horsepower and torque.

      Application. This Pypes Catted X-Box Mid-Pipe is designed as a direct installation for the 1999-2004 4.6L GT Mustangs, with either aftermarket short tube headers or the stock manifolds and a dual catback exhaust installed. Some cutting required for installation.

      Note. This X-Box Mid-Pipe is 49 State Legal - not Legal in CA - and is not CARB Certified. Please check your local and state ordinances for installation and usage regulations.

      Technical Note: 2004 Mustangs require the use of 24" O2 sensor plug-in extender wires.

      Fitment: 1999 2000 2001 2002 2003 2004 Details

      Pypes XFM37

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) X-Box
      • (2) Down Pipes
      • (1) Down Pipe Sleeve
      • (2) Catalytic Converters
      • (4) Clamps

      Tech Specs

      Mid Pipe Specifications
      Style Mid Pipe: Standard Length X-BoxType Headers Required:Shorty Headers or Stock Manifolds
      Piping Material:409 Stainless SteelPiping Size:2.5"
      Catalytic Converter:Yes - CeramicFitment:1999-2004 GT Mustangs

      Customer Reviews (100+)

        Reviews of Pypes Exhaust products have an average rating of 4.5 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • GT - 99, 00, 01, 02, 03, 04

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