Why do they call this true dual exhaust? (Page 1/4)
2.5 SEP 17, 10:53 AM
Just an example.


Why is this type of exhaust called true dual? To me... for it to be true dual, the exhaust from one head cannot be merged into the exhaust from the other head. There would also need to be two separate mufflers.
2.5 SEP 17, 10:58 AM
This to me is true dual. (Though for a V8)
dobey SEP 17, 11:01 AM

quote
Originally posted by 2.5:

Just an example.

Why is this type of exhaust called true dual? To me... for it to be true dual, the exhaust from one head cannot be merged into the exhaust from the other head. There would also need to be two separate mufflers.



It's not called true dual. Anyone who calls it that is wrong.

It is simply called dual outlet exhaust (or simplified to "dual" which could refer to dual outlet or a true dual setup).

True dual doesn't necessarily mean that the heads are independent. 180 degree headers for example, have a couple of ports crossing to the other side, but there is no intermixing of gases, after the primary collectors.
Formula88 SEP 17, 01:07 PM
Because "they" either don't know what true dual exhaust is or "they" lie.

True dual uses a completely separate pipe path for each half of the engine. There may be a H-Pipe or X-Pipe to even out exhaust pulses, but that's all.
Patrick SEP 17, 04:56 PM

quote
Originally posted by 2.5:

Why do they call this true dual exhaust?



Who is this "they" that you are referring to? Stay clear of them.
2.5 SEP 17, 05:28 PM
Thanks for confirming my thoughts
Dennis LaGrua SEP 17, 06:48 PM
I don't care what "they" call it. This type of 3" in and dual 2 1/2" outs from a crossflow muffler works well on 3800 engines. BTW, who is the OP referring to as "they"?

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

hyperv6 SEP 17, 08:24 PM
Keep in mind one exception. Flowmaster makes an exhaust for a Camaro that has two pipes back into one cross flow muffler and two exhaust pipes. The trick is the muffler houses two separate mufflers in one housing. So while it looks like a single muffler cross flow it really is a duel. I have seen it from other companies do similar things on rare occasions. Not common but something to watch for in some rare cases.
cyrus88 SEP 17, 08:31 PM

quote
Originally posted by Dennis LaGrua:

I don't care what "they" call it. This type of 3" in and dual 2 1/2" outs from a crossflow muffler works well on 3800 engines. BTW, who is the OP referring to as "they"?




Nobody knows!
DKcustoms SEP 17, 09:27 PM
Exactly.
Thanks for making this thread.

I, however, will be doing a True dual exhaust on my Fiero, each header will have its own exhaust system and come out a separate side of the car