Hey,

I have a '94 F-150 XL Supercab with a 351. I want to straight pipe it for a while to see how it sounds. I know it'll be loud, but thats what I want right now. Like I said, its only for a while.
The question is can I just unbolt it right in front of the muffler, and still leave the Catalytic Converter and everything on. Are there any special things I should know before I take off the muffler and pipe. And if you've done it or know somebody who has done it could you give me a quick description on how it's done?

Thanks

 

I've run my truck w/o a muffler, and even w/o the cat. The truck w/o the muffler was barely any louder then stock. Once the cat was off it was LOUD but it wasn't any type of desirable tone, just plain loud.

 

If you really want your truck to sound good while being loud put on a flomaster cat-back system.With just strait pipe it will be loud but won't sound very good

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82 F-100 2wd short bed . C6 410 posi 466cu. Lunati,Stealth,holley,TCI. HANG ON BOYS&GIRLS

 

I'd leave the cat's in and straight pipe it from there. Mine sounds pretty good with the cat's on since they muffle the sound a little.

 

I have a 92 f-150 without the cat and replaced the manifolds with a set of heddman headers, and ran just straight pipes of them with 1 7/8 pipe and it makes a nice sound when you get on it and is pretty loud at the same time . If you are just moseing around it is not very loud but still has a good tone to it.

 

as of yesterday, my truck is running with straight pipes. i had a clogged catalytic converter so i cut the pipes right before the first cat (right under the cab) with an electric saw. it sounded so badass that i had a good friend of mine make me a piece of pipe so the exhaust exists a little further back than where i made the cut (this way i dont get all that carbon monoxide inside the cab at stoplights). i dont know how a 351 would sound, but my 302 sounds soooo awesome, i cant even describe it. i guess it really depends on your preference of exhaust notes because this would be too loud for most people, but not for me. you will need either o2 simulators or get the computer reprogrammed because the oxygen sensors will go crazy (i havent done this step yet and my computer is throwing codes and the air/fuel mix is running rich but i hope to have this worked out by the end of the week). if you go for it, tell us how you like it. if you have any questions just post them, good luck!

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1989 F-150 XLT Lariat: 2WD 5spd 5.0[*]3" Body Lift[*]33x12.50.15 BFG on 15x10 AR Rims[*]Rancho Steering Stabilizer[*]Rancho RS 5000 Shocks[*]K&N Air Filter[*]2 Chambered Flowmaster Dual Exhaust With Cats Removed

 

I noticed that you said you had a clogged (cat), what was the symptoms of the clogged (cat), because i think i may have the same problem. My 1994 ford f150 4x4 5.0 302 efi stalls big time but doesn't die. Also doesn't have power.
Help

 

the exhaust pipes had almost no exhaust coming ou tof them, the engine could not rev up as high as it normally does, and there was a BIG loss of power. minenever stalled, but from what you said in your other post i think it might be the cats. most exhaust places can check them out for ya, so go get them checked and fixed if that's the problem. good luck

 

Sounds badass huh Donate
I got bored the other day and straight piped my truck too. The sound is so raw and powerful!!
Check it out!
http://www.angelfire.com/ne2/ray21_f...aight_pipe.wav

351w
No second cat, no muffler, 3" pipe with 3.5" tip exiting in front of rear passenger tire.

 

That sounded pretty cool, can tell there is no muffler. How bad was the cab drone?

 

i have cab drone pretty bad (doesnt bother me, but it would bother most people) because i have it dumped at the rear axle. before when it wasnt dumped, the drone in the cab was much less