H-pipe? Power?

Discussion in 'Fox 5.0 Mustang Tech' started by custom89stang, Dec 15, 2003.


  1. custom89stang

    custom89stang New Member

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    I am getting an Off Road H-pipe from Jegs. I was wondering how much power its gonna add. My car has fenderwell cold air intake and flowmaster 2-chamber cat back exhaust out back. Thats all. Was wondering if someone read something on how much power it would add to a mustang thats pretty close to stock? has the same setup? Thanks for your time.
    #1
  2. mr.nitrous

    mr.nitrous New Member

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    Its really not going to get much more power a few hp if your lucky, its going to make your car louder though. Have fun with it, there easy to install.
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  3. custom89stang

    custom89stang New Member

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    Thanks mr. nitrous! Anyone else got any other comments?
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  4. Black331Stang

    Black331Stang Active Member

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    about 50-60 HP at least. its the biggest bang for the buck.











    haha JK :D
    maybe a few HP ditching the cats and going to a mandrel bent piece. but the biggest change will be in sound. louder and meaner.
    #4
  5. v8only

    v8only Active Member

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    agreed, unless your stang is heavily modified, the factory exhaust is plenty. You won't notice a damn difference in power, but the sound alone justifies the cost. I ditched my off road pipe for a stock catted piece, and I really miss the sound.
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  6. Black 93 Fox

    Black 93 Fox Active Member

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    I put a mac off road h pipe on my car with 40 series flows. After putting it on it sound much much much better and alot louder its got a good mean throat now. You will really like how it sounds after. :nice: Enjoy it

    Also something to think about keep that stock h pipe for emission purpose's
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  7. siege

    siege New Member

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    well that's a bummer, mine didn't get very much louder (not as much as I would expect) when I put mine on...of course my full system sounds a lot quieter than I think it should..oh well, sounds badassed at WOT
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  8. blk306

    blk306 New Member

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    With the increased flow and stock motor, you're going to loose some low end torque due to the lack of backpressure but gain a few HP in the upper R's. The sound is AWESOME! :hail2: I didn't notice the low end loss until I put my cats back on for emissions, back when I was N/A.
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  9. Black 93 Fox

    Black 93 Fox Active Member

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    Doesnt the backpressure depend on what size pipes he has?
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  10. siege

    siege New Member

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    the bigger the pipe, the less backpressure obviously, but no matter what size, you're going to lose some backpressure cause cats are decent restrictions. but there will definately be a loss of torque though. however, I think the high end gain is worth it. the stock H is a dog above 4k, offroad H is much nicer all the way up
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  11. blk306

    blk306 New Member

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    That too as well as the number and quality of bends in the pipe. In this case, a straight pipe, H or X w/o cats, will greatly reduce the amount of backpressure thus reducing the low end torque, which is noticeable during around town driving.
    #11
  12. siege

    siege New Member

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    yeah torque loss is definately noticeable...I miss it. wish I could get some more decent mods, but money sucks, so I just stick to giving it more gas
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  13. blk306

    blk306 New Member

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    Yeah but the sound makes up for the torque loss.
    #13
  14. 91lxntch

    91lxntch New Member

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    well from expierence's ive seen that it will add a few ponies..it is lighter than a stocker mandrel bent as well bigger diameter...it will help rev's and the motor breath easier ...and sound great to
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  15. siege

    siege New Member

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    now if only it was legal...hate putting that stocker back on, such a pita (one of the mounting pipes or whatever is bent so it takes a lot of effort to get on and off :( ) seriously though, I've talked to a few people that can pass emissions with flying colors with offroad H's (not to mention blowers, etc), so I don't see why they should be able to fine us for it..lame
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  16. Kurt2002

    Kurt2002 New Member

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    I have the Flowmaster 3 chamber mufflers, will the O/R H-Pipe make it louder and will it drone like 2 Chambers with the O/R pipe?
    #16
  17. blk306

    blk306 New Member

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    I wish I could pass emissions with my H but I can't even stand behind my car when it's running with Cam2 in there.
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  18. siege

    siege New Member

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    yeah, it'll probably drone. when I had my 3-chamber flows it would drone nicely at about 1800-2000 rpm. but then again, every car is different
    #18
  19. 67coupe

    67coupe Founding Member

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    Kurt2002

    Depends on which 3 ch flows you have. I have the delta's. Very little drone at 1800-2000 rpms.

    If you have the old 3 ch flows, you will have a noticable drone.
    #19
  20. HaggardGT

    HaggardGT New Member

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    MAC PROCHAMBER! Most badass sound and largest power gains over stock. 'Nuff said.
    #20

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