I have been thinking about just cutting my mufflers off my truck and puting straight pipe duals out the back. Is this a bad idea, will I loose any power on bottom or top ends? Want it to sound mean, and think this is the best way to do it.

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1999 F150 XLT super cab OFFROAD package 4x4
5.4 L Triton V8, automatic

Mods:
AutoPage RS-750lcd alarm/remote start
Dual stage proximity sensor
Ford Racing Euro tails
Xenon headlights
Spray on underbody coat
20% window tint on front 2 windows
Audio:
Eclipse 5x7 point source coaxials 85741
Eclipse 8052 head unit
Eclipse 2-channel amp 3122
Eclipse 4-channel amp 36401
MTX Thunderform sub box
Image Dynamics IDQ8’s

Future modifications:
Flowmaster 40 series delta flows w/ duel tips out the rear
Xenarc HID light kit

 

dont just chop the muffler off, have someone weld you some pipes in place so you dont lose too much backpressure. keep the cats too.

 

scubasteve,

You're right , your truck will sound mean. I love the sound of straights. I have run them myself for years.

You will lose low-end. The top-end gain, however, is pretty noticeable. If you tow much you will find out just how much bottom is missing.

Do what you wish, it is your truck and will sound great. Watch the size of the pipes. 2 1/4"s seems to be the best from what I've heard. Rich

 

it will sound very mean but if you want the crack when you floor it go with the 1 7/8" pipe and leave your cats in. you will lose some bottom end but hey it's LOUD.

 

I was planning on leaving the cats, and puting some new straight pipes that exit the rear on it. I never do any towing, so I dont use my low end that much. Is the low end loss going to be that noticeable sinse I dont tow anything. If it doesnt effect the performance much I am all for it, and gain on high end is just a plus. So 2.25 size pipes for sure?, if I go larger or smaller what effect does it have. Thanks for your replys, Chase

 

larger than 2.25 will make you lose even more low end. smaller i dont think is big enough for the engine to breathe good, especially if you do more engine mods down teh road. id stick with 2.25"

 

I have a '99 and I am running True Dual straight pipes (2.5") you should feel how this sucker flows. the tailpipes will now push your hand away easily, before this was not possible with my 2.25" straights.

Low end I lost a little, top end is awesome. I can still light my tires up, so I'm not too worried and I only tow a boat occasionally. I have a chip and I am gettin 18 mpg.

The sound is awesome! I'll record it one of these days.