+1.
On a 5.0L motor with true dual you will start losing performance if you go over 2 1/4" pipes. The 5.0 needs some back pressure to help with scavenging.

If you want to keep your power you will have punny lil stacks coming up, or if you want the aestheics and mud clogging protection you will lose some power that you need while getting bogged down in the mud.

Maybe some swiss cheese chrome shields around the 2 1/4"s could make em look a lil beefier though.

 

how are you getting mud in your tailpipe? (O_o)

Do whatever makes you happy. I think running stacks on the outside of a fleetside bed looks very crude and it's possible to burn people walking by your truck / leaning on it etc. I like the idea of stacks and would run them on my truck if I could. Just keep in mind stacks aren't the best for performance.

Again I can't think of how you're getting mud in your tailpipe. Just have your pipes ran straight out back.



Good points!!!

 

i agree with bill i've sunk my truck in deep deep mud never got any in my exhaust. but do what floats your boat look at my truck its got a rear bumper on the front haha

 

yeah see my avator picture? i didn't clog my exhaust with mud and it was well under the mud as long as you keep your motor running it should be fine

that said don't get stacks for a 5.0, it's going to sound like crap at 6k which is where a 5.0 likes to make power anyway (if you ditch all the stock crap holding back the motor) save your money and put in a giant cam and a stall converter that really wakes up the motor, or just run your exhaust out infront of the rear tire looks good and performs well doesn't get clogged either

 

Well, Bronco guys have proven it times and again, one of the best exhaust setups you can build for a 302 or 351 includes a pair of long-tube headers, two 2.5" downpipes merging into a Flowmaster collector (to form a very nice Y-pipe), then from that 3" single all the way back. You got your nice flow merging, you got your scavenging effect, you got your high exhaust velocity. A single 3" then you can run as a stack through the bed, and it will even look good if you put it more towards the center of the bed - if you put any single stack in the corner of the bed, whether tis a diesel or gas motor, it looks like there were two stacks initially but you lost one for whatever reason, but bring her up slightly off to the right of your slider window and it looks like it belongs there.

 

I wouldn't say put a giant cam in ur 5.0, just make sure you keep the adv. duration@.050 below 220, if you go over .500" lift make sure you check P-V clearance and you'll probably need new valve springs.

As far as the exhaust goes, as you can see you won't have problems gettin mud in the exhaust as long as you keep her running. If you want improvements, go with some LT headers and either 2.25" duals or a 3" single.

Not to steal the thread but, 66Tbird--how do you like those 4.56 gears with the 33" BFGs, I've been seriously contemplating that set-up

 

What I'm gonna do to deal with 4" dual exhaust on a 4.9 is run 2" or 2.25" exhaust to each stack, then run it up inside the stack a ways, so I *shouldn't* lose much low-end, if any.

And to keep it from flopping inside the bigger pipe, picture a big washer looking thing welded into the bottom of the stack with the smaller pipe welded in there, too.

But I wouldn't put stacks on mine if it wasn't a Flareside.

 

I was thinking about doing the same thing. I'm not, but I was thinking of the exact same thing. That would be the best way to do it. Great minds think alike!

 

i love the gears and tire combination works great!!

 

Agreed!!

 

Go with the 2-1/4" exhaust. When you start building the stacks, make sure you drill some water drain holes in those washers in the bottom of the stacks - if you don't rain water will collect in the bottom between the stack and the actual exhaust pipe inside it, and things will rust out very quick. My buddy has a small 2.5" turnout stack at water still finds its way in there, my 3" miter-cut is much worse (to the point where I move my roommate's white car at least 10 feet back in the driveway when I'm about to fire up my diesel), and your dual 4" will be like buckets for rain water.

 

well since i work at PETERBILT...not peterbuilt...im gonna get the pete bull hauler style stacks i think they are 4 or 5" and i was gonna run 2 1/4 all the way from the LT headers back through the muffler then just build an adapter dealio to go up to the 4 or 5" stacks and angle the stack tips out at 45* like in the pic cause on cold days when the exhaust is visible it looks sick i see it when i drive truck at work its awesome

heres pics of the bull haulers those are as small as they get

http://www.hankstruckpictures.com/pi...2/p1010005.jpg

needless to say very little water get in them except when you was em and not even then if you carefull


i dont know how you guys dont get you tailpipes full of mud...somehow i always do water and mud ive had em right clogged once dont ask me how but i found it before anything was blown up luckily...id just like to put the pipes up a long way from the water for piece of mind if it does stall, it happens right

 

sorry for the double post but here is a pic of my setup but my pipes will be smaller about the same size as the y pipe in the pic

http://www.chromeroomstore.com/catalog/e81a_1.jpg

 

The only thing I can think of is rocking the truck back and forth to get out of a hole with the exhuast coming straight out right under the rear bumper... Even then the truck would have to be sunk in pretty damn good.

 

A stepside with bull-haulers will look pretty retarded. The only time bull-haulers look good is on a big truck, be it a crew-cab, a dually, a lifted truck, or any combination of the above. IMHO the only type of stack that would match the looks of a stepside is the miter-cut, or a straight cut with a flapper. I think the big-rig stacks are 5" at least, if not even 6", and either of those would be retarded for a truck as small as yours.