Hi Guys,

Let me first say I have gone through endless search pages to find answers to these questions, but I am not 100% satisfied yet. So please bear with me.

I have a 94 F150 with the 5.8 in it. Everything is stock (except for tires) and I'm looking for an exhaust system for it. I've been waiting for the stock muffler to go out, and thank god, last week a baffle broke loose inside. Now for the important part.

I want to do this right the first time so I really don't want to deal with just replacing the muffler. I want loud, but not straight headers loud. What I really want to do is run true duals, without cats, with an H-pipe, 2.25 pipes, and flowmaster 40's straight out the back with about 8" x 3" tips. I think this would bring great sound out of the 5.8, and the stock pipe size along with the h-pipe should retain most of the low end torque so I wouldn't feel much of a loss.

Does this sound like an ideal setup? I know that not having cats raises a lot of questions, and it might be hard for me to find a shop that will do it, but I'm affraid that having cats only on one side will produce different tones out of the tail pipes, and I don't want that. I guess if it came down to it, I could purchase two high flow cats and put one on each side, but that's only if I can't find anybody to do it without cats.

The last question I have is if I'll have a problem with the O2 sensor. I remember it as being before the cats and after the y-pipe. So the shop can work around the O2 sensor, but will it detect a decreased exhaust flow since it will only have half the cylinders going to it? I don't want any check engines lights coming on, or any codes showing up.


Thanks for any help.

 

On my 93 the O2 was placed in the Y pipe (it was a bar that connected the Y together) My muffler man split it after the O2 and cut the cats with Duel in duel out mufflers. Worked GREAT and did not notice any loss of low end power. In fact I had more.

 

I guess the only thing I have against getting that setup is that there isn't a 40's series with a dual in/dual out configuration. I would have to get the 50's series suv muffler. It would cut down on the cost though because I would only need one muffler instead of two.

 

I were to get a 40's series with a single 3 inch inlet, and dual 2.25 inch outlets, do you think I would lose some low end with that big of an inlet? I think that would be more of an ideal setup because I could go straight from the y-pipe, and that would also cut down on costs.

 

TomatoTruck,

That y-pipe is actually the foreward catalytic converter