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Pypes Off-Road H-Pipe (99-04 GT)

Market Price $224.99 You Save 8% ($19.00)
Our Price

$205.99

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  • Item 20131
  • MPN# HFM16

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Features & Details

  • Improves Exhaust Flow for More Power
  • Classic Muscle Car Rumble
  • Pypes Modular Construction
  • For Off-Road, Track Use
  • 2.5" 409 Stainless Steel Tubing
  • Fits 1999-2004 GT Mustangs
Improves Flow For More Power. Add even more horsepower and torque to your 4.6L GT Mustang by eliminating those power robbing factory catalytic converters with a brand new Pypes Off Road H-Pipe. The Pypes off-road H-pipe will significantly improve your Mustang's exhaust flow for a notable increase in horsepower and torque.

Muscle Car Rumble. This free flowing Pypes h-pipe for the GT Mustang will not only increases power, but it also adds a deep muscle car rumble to the sound of your exhaust with its classic "H" crossover pipe design.

Modular Construction. Pypes unique three piece modular construction makes it quick and easy to add or remove catalytic converters to your exhaust system in just minutes, depending on your driving needs.

Durable Stainless Steel Construction. Pypes uses sturdy 16 gauge 409 stainless steel mandrel bent 2.5" tubing for improved exhaust flow and features welded reinforcement plates for additional strength.

Application. This Pypes Off-Road H-pipe is designed to be a direct bolt-on for the 1999 to 2004 4.6L GT Mustangs with either aftermarket short tube headers or the stock manifolds and a dual catback exhaust installed. Intended for off-road, track use only, does not include catalytic converters.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) Two-piece H-pipe
  • (2) Down Pipes
  • (2) Clamps
Installation Info
Tech Specs
Mid Pipe Specifications
Style Mid Pipe: Standard length "H" Type Headers Required: Shorty or Stock Manifolds
Piping Material: 409 Stainless Steel Piping Size: 2.5"
Catalytic Converter: "No" - For off-road use only Fitment: 1999-2004 GT Mustangs
Will it fit my Mustang?
  • GT - 99, 00, 01, 02, 03, 04

Fits GT Only

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
great sound!

Great sound and awesome fitment on 03 mustang gt with a cobra swap. Only thing wasnt a fan of were the clamps. There's minor exhaust leaks which aren't all that noticeable but are there. Sound even better ...

Read More
Helpful (1)

5/5
Amazing!!!!

This H pipe is hands down amazing. Paired with the Flowmaster American Thunder catback system, there is no better sound. I get compliments everywhere I go on the sound. Don't waste your money on a X pipe, ...

Read More
Helpful (1)

Overall Rating 4.6 out of 5 stars
Read All 62 Reviews

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28 Questions / 13 Answers

Ask a Question

How is the sound? I'm thinking of buying this h-pipe but I can't decide. I want a loud exhaust note but I don't want it to be raspy. I think the x-pipe would make my flowmaster 10 series too raspy, would the h-pipe be better? Thanks!

chevyeater

  • The h-pipes are known to give off a deeper, more classic muscle car sound while x-pipes tend to give off a raspy, more exotic high pitched note. If you want a loud and deep exhaust note, go with the off road h-pipe...you won't be disappointed. It will definitely be a better match to your flowmaster 10's.

    Brian89

Show 4 more answers Helpful (3)

Can you still reuse your O2 sensors on this midpipe?

warewolf39

  • You should definitely be able to reuse your factory 02 sensors with this midpipe. However, because the cat's are gone you will need to purchase a set of mil eliminators to go in line with the rear O2 sensors in order to avoid the check engine light.

    Luckstone

Show 4 more answers Helpful (1)

Hello I was wondering if anybody know how many eliminators I would need because my service engine light is on I purchased the o/r hpipe can someone please help.

Tstreetz

  • You will only need one pair of Plug in Mil Eliminators.

    VincentV

Helpful (0)

I have a 01 v6 with bbk shorty headers and a flowmaster super 44. Can I bolt this on to convert to duals or will it not fit?

Jakob

do i need the catalytic converter to install this on my 2003 mustang gt?

AlexB

  • Hello! This will go in place of where your catalytic converter is, replacing it.

    Doug P

Helpful (0)

Will this perfectly fit with stock exhaust manifold and stock exhaust system ? Thanks.

Fastang

  • This mid-pipe will work perfectly fine with your stock set up yes!

    Ricky36

Helpful (0)

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Customer Reviews (62) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.607143 4.6
  • Exhaust Note 4.785714 4.8
  • Fit & Finish 4.535714 4.5
  • Bang For Your Buck 4.75 4.8



  • 5/5

    Installation Time: Afternoon

    October 31, 2016

    great sound!

    Great sound and awesome fitment on 03 mustang gt with a cobra swap. Only thing wasnt a fan of were the clamps. There's minor exhaust leaks which aren't all that noticeable but are there. Sound even better with the flowmaster super 10.

    Luis6996

    Year: 2003 Submodel: GT

    Helpful (1)

  • 5/5

    July 28, 2016

    Amazing!!!!

    This H pipe is hands down amazing. Paired with the Flowmaster American Thunder catback system, there is no better sound. I get compliments everywhere I go on the sound. Don't waste your money on a X pipe, this thing is Bada$$. Thank you American Muscle!

    RG

    Year: 2000 Submodel: GT

    Helpful (1)

  • 4/5

    July 24, 2016

    Love the sound

    Installation was a breeze. I was able to reuse the factory gasket but as others have said,the original hardware for the rear couplings is too short because of the bell being larger than needed for Catt back piping. I purchased 3/8 by 3,1/2 inch bolts and the rest was history!

    Stangedforlife

    Year: 2003 Submodel: Mach 1

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 21, 2016

    Great roar ! Will turn heads

    Bought his h pipe for that Deep roar , and was not disappointed ! However during installation the 2.5 inch bolts that hold the h pipe to the mufflers did not reach so I had to go to lowes and buy 4 new 3 inch ones so they can fit . They worked out great

    Pat805

    Year: 2001 Submodel: Bullitt

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    April 25, 2016

    Big Difference

    if you want your Mustang loud this is the way to go. I put on Flow master super 44s and they were pretty quite. I added this off road H pipe and it was night and day Difference.

    Brian81275

    Year: 2004 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 19, 2015

    Pypes H pipe with Borla mufflers

    I had many people tell me to go with Bassani. I started lokking at the Pypes on here and reading the feedback. I had a friend with a lift install them on my 2000 Saleen SC and it took about 30-45 minutes. I was anxious to hear how it was going to sound with the Borla mufflers because I've always been a Flowmaster person. The sound it great! Its not to loud but just right. It is a deep muscle car sound and I couldnt be happier. The install was a walk in the park and as stated above, the car sounds great. I would not hesitate to recommend this product to anyone. If you have a Saleen with the Borla mufflers than forget Bassani and go with the Pypes! Don't forget the mil sensors. I hope this helps!

    2000Saleen

    Year: 2000 Submodel: Other Jackson, TN

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    May 14, 2015

    great exhaust

    This exhaust is exactly what my ride needed and great price for the product,highly recommend

    marshall

    Year: 2002 Submodel: GT Westport MA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    October 17, 2014

    Pypes off road H

    Everything about this H pipe is great. Getting old H pipe off is worst thing about the install. If I hadn't had to soak my bolts and wait, install would have been an hour. Only drawback I could find is that there are no bolts sent to attach the new H pipe to the mufflers. ?? Quick trip to the hardware store fixed this but you'd think they would be included. Car sounds great, nice rumble. Thanks AM!

    txhunter30

    Year: 2000 Submodel: GT Texas

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 21, 2014

    Pypes O/R H-pipe

    great product and good price. (I still have stock mufflers) little louder rumble at idle, hit the throttle it sounds amazing, now my car sounds like a muscle car should sound. Noticeable torque gain. Getting the stock h-pipe off was kind of a pain ain't getting the passenger side off with out a swivel and a extension but after that the install was fairly easy. would have had the whole thing done in about 2 to 3 hours but had to run to the parts store and get longer bolts to bolt to the catback exhaust. If your lookin for that classic muscle car rumble this H-pipe is what you want.

    Jeff2k

    Year: 2000 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    April 19, 2013

    Imports will fear the thunder!

    I installed this bad boy in about an hour... Then started it up... I think the world may have stopped during that initial start, the. Heavens may have sang, and the ocean roared to match the note that emanated from the 4.6L ford engine. Zeus came down from his throne, just to shake my hand. What a great price for a great buy, thanks AM!

    calandr

    Year: 2002 Submodel: GT Florida, USA

    Helpful (12)

  • 5/5

    Installation Time: Afternoon

    March 22, 2013

    Pypes Off-Road H Pipe

    So i replaced my stock exhaust with the Pypes O/R H Pipe with Violator Mufflers and i have never heard another mustang with this sound, it tops all my friends stangs with flowmaster 10 and 40 series and there x pipes. The throaty rumble this exhaust puts out has earned itself a perfect 5 star, although it does have a quiet idle once you step on the gas its no longer quiet i recommend this exhaust to everyone who likes the old muscle car rumble, thanks AM for an amazing investment

    Lodies08

    Year: 2002 Submodel: GT Boston, MA, USA

    Helpful (3)

  • 4/5

    Installation Time: Full Day

    March 02, 2013

    Great sound, few snags in the install

    The finished product sounds amazing, nice deep rumble. The difference from the stock pipes to these is night and day. The reason it took me all day to install is because one of the O2 sensor holes on the pipes had not been threaded. It caused a massive headache for me and my friend, had to find a muffle shop that was open and able to fix the problem. Kind of shows badly on quality control for Pypes but still sounds amazing.

    KeithB

    Year: 2004 Submodel: GT Owasso, OK, USA

    Helpful (3)

  • 5/5

    Installation Time: Shop Install

    June 27, 2014

    Get em!!!

    This off road h-pipe has been the best thing to happen to my mustang it's so loud that I'm scared to put a catback on it...no wonder this thing stays sold out it lives up to the hype!!

    Stangangjermaine

    Year: 2000 Submodel: GT Houston, TX, USA

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    March 22, 2013

    True Muscle Sound

    Awesome product !!!!! I had this installed in less then an hour and it sounds insane combined with my 2000 Saleens Borla exhaust.This is what a Mustang should sound like.Very Happy.AM is the place to buy from.

    motorcitysaleen

    Year: 2000 Submodel: Other Warren Michigan

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    December 22, 2012

    pypes off road h pipe

    This sounds amazing, really deep muscle car sound. So easy to install.

    atrussell1291

    Year: 2000 Submodel: GT Athens, OH 45701, USA

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    February 16, 2013

    Another Awesome Product from American Muscle

    These Pypes sound sick, deep muscle car tone. .... Very satisfied with what I bought. American Muscle had fast shipping and they also offered a Military Discount.

    Wetsu271

    Year: 2004 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    March 22, 2013

    That perfect exhaust note !

    This exhaust is exactly what you want. The x pipe is to raspy and annoying but this h pipe gives you the perfect note. Nice deep rumble with no raspy high end noise. I would recomend this exhasut to anyone looking to free up some extra HP ! I did feel a mid range gain with this mid pipe.

    vortechfedgt

    Year: 2003 Submodel: GT missouri

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    November 08, 2012

    Awesome!

    Nice sound. Great fit. Easy to install. I liked it so much I got my buddy to buy the same one. He loves it just as much as I do.

    Zman26

    Year: 2000 Submodel: GT Mi

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    April 21, 2016

    Awesome sound

    Love it. The sound my pony make is awesome and i still have the stock exhaust muffler never think its going to make a lot diferent

    Black40any

    Year: 2004 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    December 15, 2015

    H-pipe

    I had these pipes on in about 2 hours, make sure you use plenty of PB blaster on the bolts and getting them off is not to bad. The pipes look great and came strait to my door in 3 days, thanks AM. Now to the down side, when I put these on I had a pretty bad miss and drove it for about 15 miles like that but when I got home I took the battery cable off and bam it was gone. Even with the miss gone my mustang seems a little weaker on the low end probably due to the lack of back presser because my exhaust is dumped before the axle but up top she screems and everything else is stock on my GT. The best part about the H-pipe is when you turn the key and start it up a nice rumble comes over the land. Wish my stand was deeper but most of the deepness stays under the car, really wish I had pipes that went all the way out the back. I suggest if your are thinking about dumping your exhaust put this on and then see what your pony sounds like.

    Andy

    Year: 2000 Submodel: GT bowling green, KY

    Helpful (0)

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