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Anyone have a high fow catted h-pipe on their car with the stock mufflers? I was wondering how it sounds. I want the car a little louder but do like the factory sound. I figures insteda for the ford racing mufflers I could get the car a little louder with a catted H pipe and maybe even a few more horses.
 

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A friend used a Hi-flow Cat'd H-pipe on his GT and did not get the louder sound he was looking for. He kept the Hi-flow Cats, but ended up changing his mufflers too.

I think most of the Hi-flow Cats are designed more towards performance than sound level.
 

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The dual 2-1/2" exhaust on our cars should breath well enough to support nearly double the HP we're making stock. If you want louder, maybe just a muffler change is what you're wanting..? Personally, I like the sound of the stock setup. Besides, the cops around here are looking for anything modified to be louder than stock. Had a MC cop following me a few days ago, possibly trying to figure out if my muffs were stock or not.. Probably wanted to write me up for something besides the missing front plate (which he didn't).
 

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oldlugs said:
The dual 2-1/2" exhaust on our cars should breath well enough to support nearly double the HP we're making stock. If you want louder, maybe just a muffler change is what you're wanting..? Personally, I like the sound of the stock setup. Besides, the cops around here are looking for anything modified to be louder than stock. Had a MC cop following me a few days ago, possibly trying to figure out if my muffs were stock or not.. Probably wanted to write me up for something besides the missing front plate (which he didn't).

I agree.
 

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oldlugs said:
The dual 2-1/2" exhaust on our cars should breath well enough to support nearly double the HP we're making stock. If you want louder, maybe just a muffler change is what you're wanting..? Personally, I like the sound of the stock setup. Besides, the cops around here are looking for anything modified to be louder than stock. Had a MC cop following me a few days ago, possibly trying to figure out if my muffs were stock or not.. Probably wanted to write me up for something besides the missing front plate (which he didn't).
+1
stock system will flow enough for anything you can throw at the stock shortblock
 

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Don't waste your time and money!!!

Get some quality longtubes and and enjoy the sound and power increase!
 

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Well if your going that route I would reccomend a X-Pipe better flow the sound does not change much but might gain 3-4 more hp...

For the same price why not!!!
 

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Nope, an H pipe sound much different than an X!!!!!

The H is definitely deeper, and less raspy.

Dyno tests have also shown the H to be worth more torque in the lower to mid range, while the X only gains a few in the very top!
 

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I heard both on the same car not much of difference on the sound aspect but I do agree that you get better lower end torque with the H pipe.

All depends what you are doing with the car...
 

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54deuce said:
Hollow out the stock H-pipe. Thats probably the sound you are looking for. It will cost you time and really no money only mil eliminators or programer. Just a thought.
I think you mean to hollow out the cats.... They are what's eating up most of the beautiful muscle sound...

You'll want a tuner though, so you can turn off that check engine light. Not necessary, but you'll probably want it.
 

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This is kind of off the subject , but here goes. Is there a sound or torque difference in the ford racing shorty headers?
 

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jymontoya said:
I think you mean to hollow out the cats.... They are what's eating up most of the beautiful muscle sound...

You'll want a tuner though, so you can turn off that check engine light. Not necessary, but you'll probably want it.

Thats what I mean.
 
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