Stock H-Pipe????
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From: Quispamsis, N.B, Canada
Stock H-Pipe????
O.k. I know when I run my duals I'm going to do an H-pipe, but can I use the stock one?
On my '94 F150, there is the stock y pipe and then it goes to the cats right? Well before the first cat there is the o2 sensor along a small pipe going to both sides of the y pipe. Now my exhaust is going from there, so should I make another H-pipe or just keep the stock one? I have to keep the o2 sensor there anyways so that's why I'm going after it.
Make another H-pipe or not?
On my '94 F150, there is the stock y pipe and then it goes to the cats right? Well before the first cat there is the o2 sensor along a small pipe going to both sides of the y pipe. Now my exhaust is going from there, so should I make another H-pipe or just keep the stock one? I have to keep the o2 sensor there anyways so that's why I'm going after it.
Make another H-pipe or not?
Last edited by moose94; Aug 22, 2003 at 07:06 AM.
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From: Independence, MO
Stock H-Pipe????
if just doing like a cat back dual exhaust you should be fine if your y pipe is in good shape. when i did mine, i put a 2 chamber flowmaster, with a 3" inlet, and Dual (2) 2 1/2" outlets right behinde the cat on the stock y-pipe, and had my muffler guy run me two tail pipes with 3" stainless tips. DW
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From: Independence, MO
Stock H-Pipe????
not far a relatively stock motor, the biggest restrictions are your cats and your muffler, where your two manifold pipes come together should be about three inches so if you come off there or behind the cat with 3" s into the muffler and dual
2 1/2's comeing out, it will breath very well if you to big of a pipe you will lose some of your low end tork. DW
2 1/2's comeing out, it will breath very well if you to big of a pipe you will lose some of your low end tork. DW
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From: Quispamsis, N.B, Canada
Stock H-Pipe????
That's not what I'm doing though. From the o2 sensor, I'm running dual exhaust. Dual Exhaust all the way back. Would it be possible to put an o2 sensor in the H-pipe? Or is that too hard?
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From: Independence, MO
Stock H-Pipe????
yes, you can do that, the threaded nipple the o2 sensor screws into is called a bung jus have your muffler guy put one in, then put in your sensor and hook up your wires, if you have an actual H-pipe then try and put in the middle of the crossover pipe. DW
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From: Quispamsis, N.B, Canada
Stock H-Pipe????
So put the o2 sensor into the middle of the H-pipe? Would it read right?
Would it be totally worthless for me to keep the o2 sensor where it is and then do another h pipe after that? Or is that one small crossover pipe good enough?
Would it be totally worthless for me to keep the o2 sensor where it is and then do another h pipe after that? Or is that one small crossover pipe good enough?
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From: Independence, MO
Stock H-Pipe????
the factory pipe coming from the manifolds is a Y-pipe, if you use a H-pipe it will replace the y-pipe, thats why i said to put the o2 sensor in the cross over. now it's my understanding that Canada dosen't have emissions testing right? Which mean you can eliminate the CATS. if you keep your cats, then with a H-pipe you use 2 cats, and 2 mufflers. one for each side, if you use a Y-pipe then you can use 1 cat and 1 muffler that has 2 outlets on the muffler, so you can run two tail pipes. hope this makes sense, But you dont want to keep the factory Y-pipe and then run a H-pipe behind it. it would defeat the purpose. DW
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From: Quispamsis, N.B, Canada
Stock H-Pipe????
DW2455, I understand exactly what you are saying, but that isn't the way I'm doing my setup.
O.k. I'll try to explain it to you: From both manifolds there is a pipe (y pipe). They swoop down and meet another cross pipe, which has the o2 sensor in it right? Well when you go past the o2 sensor you will meet the first cat. Now these two pipes (y pipe) are still seperate going into a cat. Now what I'M DOING is cutting off just before the cat where you can hook up two pipes to the y pipe. It will work for sure, I'm just trying to see whether to do another H-pipe after we connect the 2 pipes together. I want another h-pipe because the small cross pipe with the o2 in it is too small. So it won't flow right.
If anyone can understand this, tell me if I'm doing the right thing. DW2455 seems to think I want to run a cat back system or something. No I don't I want what I explained above. I'll post pics if I have to!
O.k. I'll try to explain it to you: From both manifolds there is a pipe (y pipe). They swoop down and meet another cross pipe, which has the o2 sensor in it right? Well when you go past the o2 sensor you will meet the first cat. Now these two pipes (y pipe) are still seperate going into a cat. Now what I'M DOING is cutting off just before the cat where you can hook up two pipes to the y pipe. It will work for sure, I'm just trying to see whether to do another H-pipe after we connect the 2 pipes together. I want another h-pipe because the small cross pipe with the o2 in it is too small. So it won't flow right.
If anyone can understand this, tell me if I'm doing the right thing. DW2455 seems to think I want to run a cat back system or something. No I don't I want what I explained above. I'll post pics if I have to!
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From: Independence, MO
Stock H-Pipe????
i dont think you would need another H-pipe, that crossover pipe dosent realy change the flow, its most to equalize the back-pressure on each bank of the engine, if you have free flowing pipes and a unrestricted muffler, you wont notice the difference. DW 
P.S. i thought you were trying to run a H-pipe off of the single pipe, and that wouldn't make sense. Think we got it now, sorry for the confusion!!
P.S. i thought you were trying to run a H-pipe off of the single pipe, and that wouldn't make sense. Think we got it now, sorry for the confusion!!
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From: Quispamsis, N.B, Canada
Stock H-Pipe????
DW2455, hey thanks for the info.
So a no go on the h pipe, but I thought that the small crossover is too small to flow anything though. Wouldn't it be better to equal out the exhaust even better?
It makes sense what I want to do, I just don't see why you don't think so.
So a no go on the h pipe, but I thought that the small crossover is too small to flow anything though. Wouldn't it be better to equal out the exhaust even better?
It makes sense what I want to do, I just don't see why you don't think so.
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From: Independence, MO
Stock H-Pipe????
like i said, its not gona afect your over all flow, and it wont make enough difference for you to notice, but if make you feel better have you exhaust guy weld you in a bigger cross pipe, or just redo the whole thing with a true H-pipe , new from the manifold back, i personaly woudn't worry with it, unless i was putting headders on it, then i would redo it all. hope this helps you. DW
(It makes sense what I want to do, I just don't see why you don't think so.)
heres the deal, a free flow exhaust will make a considerable difference, but if your keeping the restrictive stock exhaust manifolds, then that little pipe isn't gona matter, go spend your money on somthing more productive. But i dont mean to sound like a smart *** here, but if what you think make sense to you, and you don't understand why it don't to me, then why ask for someone else's thoughts. do it the way you want, and forget it! Good Luck with your truck! DW
(It makes sense what I want to do, I just don't see why you don't think so.)
heres the deal, a free flow exhaust will make a considerable difference, but if your keeping the restrictive stock exhaust manifolds, then that little pipe isn't gona matter, go spend your money on somthing more productive. But i dont mean to sound like a smart *** here, but if what you think make sense to you, and you don't understand why it don't to me, then why ask for someone else's thoughts. do it the way you want, and forget it! Good Luck with your truck! DW
Last edited by DW2455; Aug 22, 2003 at 11:42 PM.
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From: Quispamsis, N.B, Canada
Stock H-Pipe????
hey thanks DW. I still don't know what I want to do, it'll all depend on what the exhaust guy charges to do me an h pipe. Thanks again for your input.
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