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SLP Catted X-Pipe (05-09 GT)

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Market Price $399.95 You Save 4% ($16.00)
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$383.95

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  • Item 23022

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    Features & Details

    • Increases Horsepower and Torque
    • Race Car Growl
    • Three-Piece "Modular" Design
    • High-Flow Catalytic Converters Included
    • 2.5" Mandrel-Bent Stainless Steel Tubing
    • Designed for use with Stock Manifolds or Shorty Headers
    • Fits 2005-2009 GT and 2008-2009 Bullitt Mustangs
    More Power and Torque. The SLP X-Pipe uses free-flowing mandrel-bent tubing with a genuine X style crossover and high-flow catalytic converters to provide a significant increase in horsepower and torque over the restrictive factory catted pipes.

    Race Car Growl. This free flowing SLP x-pipe for the 2005 to 2009 Mustang's not only increases power, but it also adds a raspy, race car growl to the sound of your exhaust with its modern "X" crossover pipe design.

    Upgradable Modular Design. SLP's exclusive three-piece modular design makes it possible to easily upgrade to SLP's Long-Tube Headers without the need of purchasing a brand new X-Pipe by just removing the down pipes. This unique modular design also makes it easy to install this X-Pipe on your Mustang with just basic hand tools.

    Quality Stainless Steel Construction. Constructed entirely from 2.5" mandrel bent stainless steel tubing for improved exhaust flow, this SLP Mid Pipe features a true "X" crossover, not a poor-flowing clam shell imitation that other companies use. The included SLP High flow cats far out perform the restrictive factory catalytic converters to increase rear wheel horsepower and torque.

    Application. This Catted X-Pipe from SLP is designed as a direct bolt-on for the 2005-2009 GT and 2008-2009 Bullitt Mustangs with either aftermarket short tube headers or the factory manifolds and a dual catback exhaust installed.

    Fitment: 2005 2006 2007 2008 2009 Details

    MPN# M31538

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    Hardware included:
    • (8) band clamps
    Installation Info
    Tech Specs
    Mid Pipe Specifications
    Style Mid Pipe: Standard length "X" Type Headers Required: Shorty
    Piping Material: Stainless Steel Piping Size: 2.5"
    Catalytic Converter: "Yes" Fitment: 2005-2009 GT Mustangs
    Will it fit my Mustang?

      Customer Photos (3) Submit Your Photo

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        Questions & Answers (14)

        5 Top Rated Questions

        I have the SLP Loudmouth muffler deletes on my GT. I want to get the SLP catted x-pipe and I am wanting to know two things: how much will it change the sound of my car (I'm looking to go louder) and will it cause droning?

        • The SLP Catted X-Pipe will increase both the volume of your exhaust, and make it sound more raspy/racey. While this will not cause any drone in and of itself, it will make any existing droning louder than before.

        Helpful (1)

        Where can I find installation information for this product

        Will this cause a Check Engine Light or confuse stock o2 sensors?

        • The SLP Catted X-Pipe may cause the check engine light to come on since you are replacing the stock catalytic converters with high flow ones. It is recommended to get a tune when installing this item.

        Helpful (0)

        I've bought these and they sound great. I'm trying to add some longtime headers but I've heard no headers except slp headers will bolt on right on them. Is it true or can I buy any headers for this x pype ?

        • Hi, This X-pipe can be used with any aftermarket short tube headers for 05-09 Mustang GTs.

        Helpful (0)

        Does this replace the factor cats as mine are clogged and causing a cat failure code on cel wanting to kill two birds with one stone

        • This catted x-pipe will replace your factory mid pipe with the catalytic converters.

        Helpful (0) Show 1 more answer
        Post Your Question
        9 More Questions
        Can i pair this with borla atak axel back exhaust or does it have to be the whole cat back system for them to pair with the x pipe? 1 answer
        Hi, prior to installing this x pipe on my 2008 mustang gt/cs, my check engine light came on. I also have pypes axle back also. All welded together. My CEL is on. Is this normal? Will these pipes refrain me from passing inspection? 1 answer
        will this fit on a 2007 v6 mustang that already has the dual exhaust?? 1 answer
        Will these work with stock headers 1 answer
        what headers will work with this x-pipe because unfortunately SLP does not make headers for the 3v 05-09 mustang gts and if no other headers can go with it then what would work in this case 1 answer
        Will this x-pipe fit my bassani axle backs? 1 answer
        Will this item work with SLP Axle-Back Exhaust? I have a 2008 Ford Mustang GT/CS with SLP Axle-Back Exhaust (muffler delete) installed. I want to replace my factory H-Pipe with an X-Pipe. The description states, "This Catted X-pipe from SLP is designed as a direct bolt-on for the 2005-2009 GT... with either aftermarket short tube headers or the stock factory manifolds and a dual catback exhaust installed." It says catback not axle-back. Does that mean it won't fit on my car? Plus, do I need to replace my catalytic converters? Should I stick with the same brand as my exhaust? 1 answer
        Will slp x-pipe work with other brand long tube headers? 1 answer
        tuneing Do you need tune 3 answers

          Customer Reviews (32) Write a Review

          Overall Rating 4.3

          out of 5 stars

          Installation Time:Full Day

          Installation Cost:$100-$250

          • Loudness / Volume 4.458333 4.5
          • Exhaust Note 4.666667 4.7
          • Fit & Finish 3.916667 3.9
          • Bang For Your Buck 4.666667 4.7



          • 5/5

            Installation Time: Afternoon

            September 08, 2019

            Slp x

            Great sound and tone, different than that “every other mustang” sound

            ReedD

            Year: 2006 Submodel: GT

            Helpful (0)

          • 1/5

            April 16, 2019

            Sounds great hangs way too low

            Ridiculous how low this system hangs. Sounds good but uneven fit

            DennisH

            Year: 2007 Submodel: GT

            Helpful (0)

          • 4/5

            Installation Time: Afternoon

            October 25, 2018

            Works fine.

            Works as described. Sounds loud. Was worried that this would pas NY emissions but it did

            Glenntime

            Year: 2005 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Afternoon

            September 26, 2018

            I enjoy it

            The exhaust soinds great. Has a good raspy sound and a bit louder than the stock setup. The instructions that came with it weren’t exactly helpful, but the pieces aren’t exactly rocket science to figure out. The only problem I ran into was the upper driver side sensor didnt reach the hole in the pipe and i had to unhook the wires from the mount and then it reached barely

            ranchero13

            Year: 2005 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Less than 1 Hour

            February 25, 2018

            Great X pipe!

            At 1st when i was installing the X pipe it took a while due to rusted bolts but after penetrating the bolts it was a piece of cake to install i had no issues with them, no exhaust leaks and sounds great. one thing was that after riding for 2 days the check engine came on but after 2-4 days of driving it went away and i daily my car and it has not come back on ever since. i would say this purchase is great if you are trying to pass inspection and sound great.

            Gloera

            Year: 2006 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            February 20, 2018

            Catted X-pipe

            Sounds great during acceleration. Not much difference in sound while driving at highway speed. No clearance issues.

            JohnP

            Year: 2006 Submodel: GT

            Helpful (6)

          • 3/5

            Installation Time: Afternoon

            February 13, 2018

            Sounds Great!!!

            First off, when it's all said and done it sounds great paired with Pypes mid-muff cat-back. Pretty loud to still have cats. I had a little drone and rasp at first, but it's gone now after 500 miles. First problem, I didn't receive the drivers side flange, or any clamps. Probably SLP's fault instead of AM. I didn't want to cut my factory h-pipe for a flange, so I picked up a flange and 4 band clamps the same day. The install wasn't bad on Jack stands, not much room for clearance tho. Second problem, I've been running it for two months now and my check engine light came on. After a couple more days of driving it turned off. Then, it turned on again, and my code reader said cat deficiency bank 2. A week later it turns off again, and it's still off now. But, it's awsome once it's bolted up. My first time out I noticed it revved up much faster than normal from a launch, but figured out it was my tires spinning:) Low end gains are negligible, but can def feel gains 3k and up. Next up headers!

            DanA

            Year: 2007 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Afternoon

            February 13, 2018

            A good replacement

            Previous owner had removed the cats, and it did not pass state inspection for me. replace with these. Still aggressively loud with a good roar. Easy to install in a couple of hours from start to finish.

            TinaR

            Year: 2005 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            January 11, 2018

            Nice sound!

            Great bang for buck. Check for leaks and then ride into the sunset!

            Rizo426

            Year: 2006 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Afternoon

            August 02, 2017

            Loud

            I have this set up on my 05 GT with pypes muffler delete axlebacks and it is one of the loudest cars I have heard in person. Install was a breeze and sound is amazing. Only thing, check for leaks thoroughly. I have one on the left side of my downpipe because the clamps aren't 100

            WilliamB

            Year: 2005 Submodel: GT

            Helpful (6)

          • 4/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            June 22, 2017

            Not bad

            Pipes hang low. Much louder than I wanted. The note is much higher going to have to add some kind of exhaust system to lessen the noise and bring the deep sound back. Otherwise increased performance. Happy but I need to add more to get it the way I like.

            ChrisK

            Year: 2007 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            June 22, 2017

            x pipes

            i really like the sound and seems like a little more power

            JohnL

            Year: 2005 Submodel: GT

            Helpful (5)

          • 1/5

            June 09, 2017

            SLP has terrible quality control

            I purchased this product 3 weeks ago. It's sitting in the box in my garage. The part that secures it to the header on the drivers side is the wrong size. I have called american muscle, they had SLP send out a replacement part. Its still the wrong size. I called SLP , they said their design must be strong and to call american muscle to bring up the problem. I will never but SLP product again.

            JohnG

            Year: 2005 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Afternoon

            April 27, 2017

            Satisfied.

            Came well packaged with no surprises. Would buy again.

            RyanB

            Year: 2005 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            November 18, 2016

            Power!

            Just had Fastlane Motorsports install this carted x pipe, its paired with Borla S exhaust. Sounds the same or maybe a little less agressive at idle but my 07 GT/CS really turns heads through the gears! I can really tell a huge power gain as it feels like my car got some nasal spray and opened up the airways! Immediate difference, louder and drives smoother, well worth my $500! Great product as I am very picky and had my doubts

            Twilson

            Year: 2007 Submodel: GT

            Helpful (10)

          • 3/5

            Installation Time: Less than 1 Hour

            October 21, 2016

            Amazing sound SLP

            The things sound amazing. Just I use Tien S Tech springs and man do these thing hang low I scrap everywhere and even on a little bit of the uneven roses wth.. took it to a shop to install for 100$ and next fay coming back to have them a little modified and I still scrape there goes 100$ down the drain. This is frustrating.

            KingDJ

            Year: 2006 Submodel: GT

            Helpful (5)

          • 4/5

            August 31, 2016

            Fire breathing Monster

            This was the right purchase for me. The sound is great. Real loud once you open it up. Has a real muscle car feel to the sound. The Slp catted pipes with Slp loudmouth tips work great together! Love the new mod!

            Grimreaper

            Year: 2005 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            June 24, 2016

            Easy installation, less than 2 hours! Great sound Improvement

            Great Product! I was wondered if I would lose any torque even tho I was suppose to gain HP. We did mine on a lift and install was a breeze, we did weld the cats to the x-pipe and the down pipes to make sure we didn't have any leaks, I only did that because of a couple previous reviews mentioning leaks. So far I am very happy, sound is very crisp and deep, a lot more than I had before and the car feels like it may be a little more responsive as well. A Very happy with the cost and the quality of the kit.

            TechGuy2

            Year: 2007 Submodel: GT

            Helpful (6)

          • 3/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            October 11, 2015

            Good but....

            Had a muffler shop do the install which was no issue. Bolted right up to the Pypes catback.. The reason for the low rating on fitment is this: These pipe hang looow.. My Mustang is stock height and I am having issues with bumps and ramp when driving day to day. I love the muscle car look which is why my car is stock height. I only plan to get new shocks, sways and control arms. I can only imagine most who love to lower their Mustangs and have these pipes installed driving day to day. So please be warned.. Other than that, fit and finish is fine, The sound is lovely and performance combined with the exhaust intake and Bama is the power I have been looking for.

            BEAU

            Year: 2005 Submodel: GT Carson, CA

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            August 20, 2015

            Awesome Product!!!

            Just installed on Saturday to pair with my Flowmaster American Thunder CBE and WOW! Sounds incredible! This paired with 4:10 gears, CAI, and BAMA Race tune = Holy GOD! Install was a breeze on the lift. Hardware worked as anticipated. I was stoked that I didn't see a Check Engine Light when I started it for the first time.

            JohnnyRaincloud

            Year: 2008 Submodel: GT San Diego, CA

            Helpful (5)

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