CNET On Cars - Car Tech 101: Dual exhausts demystified

Brian Cooley visits Johnny Franklin's Muffler in San Rafael, Calif., and shows you how a dual exhaust system works and whether you'd want or need one in your car.

[l.douglasthomsen]

I have to say that the guys at Johnny Franklins Muffler Shop in San Rafael, are hands down number one, when it comes to knowing the types of Mufflers/ Catalytic Converters best suited for your car, truck, SUV, and Hot Rods! They are the only shop I go to for any chassis, and exhaust work. The manager, and I believe one of the owners Don, is up front with you and the best thing is, you can trust him and his crew! You get more for your money, and no matter what the job, it is done quickly, and with American- know -how! You won't worry about going back because something went wrong with their work, but you will be bringing your other vehicles to them when the time comes for new mufflers!😎

[soundseeker]

What if you car has a dual system as far back as the muffler then becomes a single pipe? Would changing it to dual mufflers improve power or economy?

[michaelmyers]

1974 Dodge full size van I had a true 2 inch dual exhaust with thrush turbo mufflers nothing else exited out in front of the rear tires never had no drone noise inside the van ever was not loud was a nice mellow low Rumble headed that way since 1983

[blackericdenice]

Dual exhaust doesn’t increase mpg. You burn more fuel than with single exhaust. The reason is, people drive harder because they want to hear the exhaust.

[phili]

Good explanation. I have a true dual set up on my '06 Mercedes CLS 500 & will be doing away with the centre resonator that the two pipes run into & out of & in it's place just running two straight pipes out to the rear mufflers. There is a small cross over tube inside the resonator that will be got rid of, I want more of the 'blat' that you get without the H-pipe or X-pipe & will hopefully give more of the old school muscle car sound that I'm after, the lovely throbby, woofly V8 sound.

[yeboscrebo]

So lance Armstrong is doing exhaust now?

[marksutube]

Question, when dualling an exhaust, do you need to add oxygen sensors to both sides or can it be monitored on one side only?

[marlon]

I would love to convert my 2004 Mazda 6s 3.0L V6 to true dual exhaust.

[jody]

the longest exhaust commercial i have ever seen

[ThePixelsony]

I want true dual exhaust with quad tips on my Prius 😂😂😂🙊

[javyassassin]

Should I put dual exhaust in a crown vic

[vansdefengineering]

I want dual exhaust on my Daewoo Matiz 2

[VillsvinJeger]

Jewelry? No, It's function my friends. And my 1960 Buicks all had factory full dual exhaust, blending both pipes into a mixing resonator/muffler right in front of the fuel tank and then dual back out.

[NewGamer]

So eliminate the equalizer pipe, any significant difference?

[johnjerrehian]

They should have addressed the exhaust manifold more and the significant power or breathing a set of headers can bring.

[vanguard]

Looks like a late 60's Cougar. Taillights are the tell.

[custombuilds]

Why have a muffler glass pack if it's free flow anyways ? Want to fo it to myv6 Mercedes my drone is horrible took off muffler

[DirtyMustangBoy]

Well to be on the legal side Ima do a catback dual

[richardclarke]

Can it be done to a 1998 Toyota Camry LE

[hondas]

Why not use louvered cored resantor? Is it better then louvered-core resantor