exhaust, dual in-out?

[storlied]

Im looking for a list of exhaust systems that are dual in, dual out, iv got the 98 5.0L v8 so its already got the dual in stock, so yea... uhm... also .. headers, which would be something to do first? headers, then exhaust, or just get the exhaust done?

what would be the price of that anyways? with just headers done, or just exhaust. or both, i know its gonna depend on the kits i get but what did you guys pay?

 

[RubySlow]

exhaust will be cheaper and less work..
Here are some of the ones Ive had and the one I have now..

Dual flows.. cut offs Had this the second week I had the car

Then I gutted the cats and attached a crossover pipe

Now I got some Ricey ones on, they are super deep and rattle your eardrums

The headers are gonna be a while Id Go with TMs, Im saving up for them!
Here is a link on how to...
http://www.explorerforum.com/forums//showthread.php?t=153944

 

[storlied]

i wouldnt be installing any of this myself, how much do you suppose it would be to have a shop install the tm headers?... plus flowmaster 50 for exhaust?...
just trying to get a general idea, thanks

 

[MountaineerGreen]

If you intend to get headers, you need to carefully consider your exhaust options. Too much flow on the exhaust with headers will loose low end torque. So, if you are going to get headers, you need a dual in, single out muffler for backpressure to keep your torque. The factory manifolds are so restrictive, if you intend to keep them, go with whatever exhaust you wish- it won't matter.

Headers will take 6-8 hours to install, I'd guess- It all depends on the mechanic. Shop labor rates vary from place to place, so it'd be helpful to check around at shops and see. That will give you a starting point.

For more fun reading see the 5.0 Exhaust Thread

 

[storlied]

so you're saying that if i keep the stock headers, it would be pointless to get a better exhaust?

what about getting tm headers and leaving the exhaust with the stock one?

I've noticed that i have dual in, i want to use this engine to it's full potencial

also, this is a stock 98 5.0 i have, im going to get a mac intake for it soon

 

[MountaineerGreen]

so you're saying that if i keep the stock headers, it would be pointless to get a better exhaust?

Well, basically. The stock manifolds are pinched together at the ports to facilitate easy assembly, the tubes at one point neck down to a hole no bigger than my finger, and that is for 2 cylinders. Look at these pictures:

See on the passenger side where the "front two" cylinders pass through the third? See how its pinched down there?

what about getting tm headers and leaving the exhaust with the stock one?

I've noticed that i have dual in, i want to use this engine to it's full potential

The engine can benefit from more flow over stock, such as a higher flow muffler and 2.5" piping, but still a singe tailpipe. But, the headers alone can make a huge difference.

also, this is a stock 98 5.0 i have, im going to get a mac intake for it soon

There is also an Airmax Spiral intake available: I haven't seen one in person, they look pretty neat though.

http://wheelskin.com/spe-25000.html

 

[cstanton]

im keeping the stock manifolds now but going with a dual in/out super 40 flow i think its gonna sound sweet

 

[MountaineerGreen]

im keeping the stock manifolds now but going with a dual in/out super 40 flow i think its gonna sound sweet

Well, you are talking about a 4.0, apples and oranges.

 

[storlied]

hmm

im more about the power increase than the sound tbh, but which would i see the biggest difference? headers, or exhaust? if i want dual out, should i just leave the headers alone to keep the low end power?

its probably gonna be a lot cheaper and time consuming for me to just focus on the exhaust, right? but like i asked earlier, which would i notice the biggest difference?

 

[MountaineerGreen]

Biggest difference by far is headers. They make dyno proven horsepower and torque. Until you get your engine past the biggest bottle neck there is, any other mods will have a minimal gain.

With manifolds, you will see very little difference performance wise with exhaust work. It would most likely be cheaper to work on the exhaust though. If your set on dual exhaust, then do that and leave your manifolds in place. Or get the headers and duals too, and loose your low end torque.

 

[Xan]

I really depends on what you plan to do with the truck. If you're a offroader you might want to not to do the dual exhaust, but if you're gonna be a pavement driver i'd do both but make sure you get a X or H pipe put into your exhuast or a get a x pipe style muffler like me. I allso don't really agree that you woln't see much from doing exhaust by its self. The whole exhaust system on this truck is restrictive to get the LEV sticker on it. My exhaust did help alot, a better way to say it is you'll see even more improvment with headers when you get the exhaust done too

 

[storlied]

i have a question to MountaineerGreen , my manifolds aren't the ones shown in those pictures... they're the other stock ones ford used.. they look like crap pieces of aluminum pieced together by a crackhead... i found pics of em on this forum but couldnt find them again.. i was wondering if they are less restrictive than the ones shown with the "pinches" as you pointed out.. if so.. would it be more beneficial to get the dual exhaust seeing as my stock headers are less restrictive? blah.. i feel like i have no idea what im talkin about.. lol
but yea, thanks for the help

 

[MountaineerGreen]

Actually, the stamped manifolds are more restrictive than the cast manifolds pictured above. Dual exhaust would be about the same effect either way. If you really want dual exhaust, go for it

 

[rwenzing]

These are the earlier 5.0L Ex stainless manifolds compared to the Torque Monster headers. Each tube of the stockers is severely pinched for ease of assembly and flow is compromised for simplicity and fit in the available space. Torque Monsters are more complicated, expensive and take more time to install ... but flow is clearly the priority.

 

[storlied]

so you guys are sayin getting and intake and getting dual exhaust, hell.. doesn't even need to be dual, just less restrictive... il notice Nothing and it would be pointless to do without getting the manifolds replaced? if it still does make a difference with exhaust and intake work, would ithe increase in power even make a big difference in what i have now, stock?
god, i butchered that sentance.. bah [hangovers] :thumbdwn:

 

[MountaineerGreen]

The headers netted 20+ hp on the dyno with stock exhaust. Too much free flowing exhaust with headers = lost torque.

 

[storlied]

so dual exhaust right now would be pointless without headers?

would i get anything out of getting a mac intake with dual exhaust? (no chip)

 

[beach]

I have a dual in/out Flo Pro muffler, local shop was the only one able to bend piping to have the duals come out each side behind the tires. Pry 15 other shops I went to that wouldn't touch an Explorer/Mountaineer for dual exit.

 

[Dan Whitaker]

The location of the gas tank & the tire underneath make it a pain to do.

Unlike the old says when the older now retired exhaust guys new their stuff it was not a problem. Now you have mostly the lazy generation.

 

[MountaineerGreen]

OK- Dual exhaust nets no gain over single exit exhaust on the 5.0 Explorer, dual exhaust is a negative with torque monster headers. I won't discuss other engines vehicles, because I do not know enough about them to speak accurately.

I did a free flowing muffler, single tail pipe with my stock manifolds and got nothing but more noise. Sounded good, no more MPG's, no more power in any way. Duals will be the same with stock manifolds because the manifolds are the bottleneck, not the exhaust.

With headers, a dual in, single out muffler with a 2.5" tail pipe is desirable to maintain backpressure and thus torque, needed to move the heavy SUV.

So, if you want duals, just for the sound, and don't intend to buy headers, go for it. If you want to buy headers, don't waste your money on duals.

The bottom line is dual exhaust gains nothing except for maybe sound.