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Pypes The Beast Off-Road Exhaust (99-04 GT)

Item 20063
AmericanMuscle no longer carries the Pypes The Beast Off-Road Exhaust (99-04 GT). Please check out 2015-2022 Mustang Exhaust Combos for an updated selection.
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    Video Review & Installation

    Hi I’m Justin with, and I’m going to be breaking down a system from Pypes they call “The Beast” fitting all 99-04 Mustang GTs. This system is actually a combination of a couple of different parts, first up we have Pypes’ violator series catback, paired alongside with Pypes’ offroad X-pipe. We used this exact system on our 98 bolt on build up, and let me tell you, the beast is a great description of the sound you get using this kit. Both the X-pipe and the catback are constructed using 409 grade stainless and feature mandrel bent 2.5” tubing, through those stainless violator mufflers, and all the way back to these 3.5” polished tips. Since you will be installing an X-pipe along with the catback portion, the install itself will be slightly longer at about 3 hours from start to finish, when it’s all said and done. Of course this factors in time for cutting off your factory exhaust as well, which will need to be done in order to perform this install. Now let’s hear how the beast from Pypes sounds compared to our factory exhaust.

    Product Information

    Features, Description, Q&A, Specs & Installation


    • Maximum Sound and Maximum Flow.
    • Includes Off-Road X-Pipe and Violator Cat-Back.
    • 409 Stainless Steel Construction.
    • Fits 1999-2004 GT Mustangs.


    The Beast. The Pypes Beast kit for the 1999-2004 GT Mustang combines Pypes 409 Stainless Steel Off-Road X-Pipe with their 409 Stainless Steel Violator Cat-Back for Maximum Sound and Maximum Flow.

    Pypes Off-Road X-Pipe. Pypes Mustang Off Road X-Pipe Crossover pipes are second to none when it comes to balancing out the exhaust gas pressure in your system. Constructed of sturdy 16 gauge 409 Stainless Steel tubing, each pipe bolts up perfectly in the stock position..

    Pypes Violator Cat-Back. Violator Cat Back Exhaust from Pypes is the last exhaust system your 1999-2004 GT Mustang will ever need! The system is built to last, constructed from high quality 409 Stainless Steel. It features two Violator "Rude Sound" mufflers for Pypes ultimate in flow with an ultra aggressive sound.

    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Off-Road X-Pipe
    • (2) Down pipes
    • (2) Muffler assemblies
    • (2) Over axle tailpipes
    • (4) 2.5" clamps
    • (2) Muffler hangers
    • (2) Tailpipe hangers

    Tech Specs

    Mid Pipe Specifications
    Style Mid Pipe: Standard length "X" Type Headers Required: Shorty
    Piping Material: 409 Stainless Steel Piping Size: 2.5"
    Catalytic Converter: "No" - For off-road use only Fitment: 1999-2004 GT Mustangs

    Cat-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
    Piping Size: 2.5" Tip Size: 3"
    Muffler Type: Chambered Fitment: 1999-2004 GT Mustangs

    Questions & Answers

    10 More Questions

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