deeper and louder
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Junior User
Joined: Apr 2004
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deeper and louder
I have a 2003 F150 with a 5.4L V8. About a year ago I had a Flowmaster 40 put in and the rest of the pipes are the same. I gotta say that I'm not really pleased with it. While sitting in neutral it sounds great, but I'm looking for something that will be louder and deeper without losing any HP or Torque.
Any suggestions?
Any suggestions?
Posting Guru
Joined: May 2004
Posts: 1,214
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From: Indiana
that'll kill the high end.
What exactly is your setup now?? You just took the stock muffler off and replaced it with a FM40? If this is the case.. I would either
a) cut two of the cats off(it should have 4) and then put 2 flowmaster single in/single out on the dual pipes-that would be loud while still giving you enough back pressure to support you with HP.
b)take the flowmaster or flowmasters off, i dont know how many you have on there. And just run your exhaust with 4 cats and straight pipe the rest of the way out.
Those are two good setups in my opinion, where you wouldn't lose HP or hurt your motor..that yet would still make your truck LOUD.
What exactly is your setup now?? You just took the stock muffler off and replaced it with a FM40? If this is the case.. I would either
a) cut two of the cats off(it should have 4) and then put 2 flowmaster single in/single out on the dual pipes-that would be loud while still giving you enough back pressure to support you with HP.
b)take the flowmaster or flowmasters off, i dont know how many you have on there. And just run your exhaust with 4 cats and straight pipe the rest of the way out.
Those are two good setups in my opinion, where you wouldn't lose HP or hurt your motor..that yet would still make your truck LOUD.
Posting Guru
Joined: Jun 2002
Posts: 1,214
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From: Rio Rancho USA
Please read a little about backpressure. No engine needs backpressure. Want backpressure? weld a plate ovet your tailpipe and drill a 1/4" hole for the exhaust to flow through. That should make your truck run real good 
It doesnt support HP, it kills it.
And straight pipes will NOT kill your "high end". Thats actually the first time I have ever heard that. Usually people claim it would kill low end torque, which it really doesnt, or so little that you would not notice. Depends on pipe size. Go check out some dyno plots on any engine you can find on the net. There are thousands, and they will show you proof on either account. Neither will "hurt" the motor either.
Deeper- place the mufflers as far foward as possible. The more pipe after the mufflers, the deeper the sound will be.
Also you can use larger pipe after the mufflers. That really deepens the tone. Dont go stupid on size, and exhaust velocity will not be hurt. A size or 2 bigger is all you need.
Louder- Cut the rear cats off. Get headers. Both will do the job.
It doesnt support HP, it kills it.And straight pipes will NOT kill your "high end". Thats actually the first time I have ever heard that. Usually people claim it would kill low end torque, which it really doesnt, or so little that you would not notice. Depends on pipe size. Go check out some dyno plots on any engine you can find on the net. There are thousands, and they will show you proof on either account. Neither will "hurt" the motor either.
Deeper- place the mufflers as far foward as possible. The more pipe after the mufflers, the deeper the sound will be.
Also you can use larger pipe after the mufflers. That really deepens the tone. Dont go stupid on size, and exhaust velocity will not be hurt. A size or 2 bigger is all you need.
Louder- Cut the rear cats off. Get headers. Both will do the job.
New User
Joined: Mar 2005
Posts: 9
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Flowmaster seems to be what everyone likes around here. If you dont like the Flowmaster then try a different name. But one bit of advice ill give ya is dont go with Magnaflows. Whatever you do let me know how things go with it.
More Turbo
Joined: Nov 2004
Posts: 646
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From: Cleveland, TN
Originally Posted by mtt_e
But one bit of advice ill give ya is dont go with Magnaflows.
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Posting Guru
Joined: Jun 2002
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From: Rio Rancho USA
Originally Posted by mtt_e
But one bit of advice ill give ya is dont go with Magnaflows.
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