This may be a bad idea, but I've been wondering about it for awhile.

Here's the idea:
A true dual exhaust where there's a pipe coming off each cylinder bank and eliminating the y-pipe. I'm not really familiar with dual exhausts, but I believe you would want a X or H pipe to even out the exhaust flows. Would there be any performance and/or acoustic gains from this over say cattman headers or is there not enough exhaust flow to make this worthwhile? Thanks for any input you guys can offer.

 

I really doubt there would be any gain doing that, rather than just a Y pipe, and cat back...

Even with headers, you're gona need more flow INTO the engine as well as out of the engine. I personally wouldn't do a "true dual" - It most likely will sound like a 300ZX n/a with exhaust work done.

If anything, I'd want my Max to sound like a G35...

 

i would say there is no room for anything like that. on a RWD design (where the exhaust is coming off towards the sides of the car) the natural design of the exhaust would lend itself to an X or H pipe (as aftermarket shows with MANY H or X pipes available for most any RWD car) since the two banks are far enough apart to make a decent X/H pipe.

for the FWD with the exhaust coming out primarily down the center and both banks converging in center, it really doesnt leave much room to play with. the exhaust chanel going down the center of the car is really not big enough to put two pipes in it let alone an X pipe. only thing that would work is an X pipe about 4-5 inches wide. factor in the size of the pipe and you are basically butting two pipes together with your X pipe. that is all of the top of my head, there might be a logical way to attempt it but i jsut dont see it.

--Paul

 

If a 2.5" single pipe is what's considered ideal for an NA car, one would need two 1.75" pipes to get the same flow.

I think one could squeeze two 1.75" pipes under the car and out the back. Muffler placement at the end would be an issue though. Or, one could run a dual-in dual-out single muffler at the back, in the stock location.

 

now the real question is what gains are there if any?

 

Different sound.

 

all that work for sound is

 

For a V6 engine without twin turbo and a good place to run the pipes, it is not really practical to get true dual exhaust with or without a X or H pipe. It is a much better mod for huge V8s with space under the body for it. It would also be very hard to fit resonators or cats under there, although you would probably run straight pipes anyway.

Big V8s (ie camaros, mustangs, corvettes) gain more from having dual exhaust b/c they are much bigger engines and could use the extra flow. Most 6 cylinder engines (ie Skyline, Supra while not the 300zx) have single exhaust b/c the single flows well enough, and dual would be unnecessary and since it would be heavier, it could actually slow you down for what little you would free up exhaust flow if it even would at all. The 6th gen maxima and V6 Altima both have fake.

If you really want the dual exhaust look I would say just get a fake set like custom maxima or just a custom setup. I think you have to crush your spare tire well. I would rather crush it than be able to see the pipes under the car. I hate seeing those v6 accords with the fake dual exhaust stock and you can see the rear reverse Y pipe from the back. Honda and even toyota feels you should see the exhaust piping from the back of some camrys and accords and I find it annoying. I also can't stand to see dual rice cans that looks horrible. It does look nice and balanced though when done properly.

 

I really don't want a dual exhaust (not enough to lose the spare anyway). I thought it might be a good alternative to cattman headers, I did figure we probably didn't have enough flow to justify it though. Thanks alot everybody for participating.

 

yeah thats what i originally wanted to do to my max, but after talking to many exhaust shos, and mechanics thgey all said that there is not enough back pressure for it to be worth it. so i just went w/ a catback dual exhaust.

 

Did someone say dual exhaust?