cnet.co/1pCRBfb 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.
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!😎
Idk man did you see out out of whack that first cars pipes were setup? Maybe they put a new guy on that job…..Fortunately most will never see the workmanship or lack of but still the installer prob had to learn how to sleep again
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.
False. Pre 1975 vehicles will increase about 2mpg. Modern vehicles increase 0 to 2 mpg. People need to do a driving modification on themselves if they are having a heavy foot.
Have someone rev the engine and check the other exit, nissan has mufflers like that, its done intentionally to help low end torque then at higher engine speeds the pressure of the exhaust opens up the second exit helping on the high end
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
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.
if your car has 1 exhaust then stick with it only add other exhaust pipes if u want to lower the sound >>> every time gas,s bounce back or directed through 180 degrease the sound levels by half
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.
+OddTimeMan I believe he means resonator..... Use actual mufflers. Resonators are just for making noise, and are really annoying to everybody both inside & outside the car, particularly on small motors
@@Instrumentator23 Your old glasspack probably had no fiberglass left, the cheaper glasspacks have fiberglass that burns away (maybe after a month with higher running temp EFI engines and with cats than burn very hot, but might take a year or more with catless exhausts). The Dynomax Bullet does well at resisting burning away even on newer cars/trucks. Other factors may be your new exhaust is smaller pipe diameter, you might not have exhaust tips which act like a megaphone and amplify the volume, and your Bullets might be the longer case mufflers and your old single glasspack might've been a little 8" shorty case.
@@AdmiralRustyShackleford Preciate it, the bullets i put on were shorter than the single glasspack i had and tips stayed exactly the same as well as the pipe diameter. I wound up changing everything again because i didn’t like it and got it to where i was more than happy with it.
There's no performance to be gained with dual mufflers, and depending on what you use, you may lose a tiny little bit. Also two mufflers is heavier, obviously. Another 10-15lbs. NBD tho. The advantage to multiple mufflers is purely sound control, be it to make it deeper sounding, change the tone a little, or simply reduce overall volume, especially inside the vehicle. Obviously running 2 mufflers is quieter than 1 muffler of the same type, but 2 also tends to be deeper sounding. Also, having multiple mufflers (2 on a single, 4 on a true dual, or 3 like this) cuts down on interior noise especially. Every inch of exhaust tubing from a sound changer (header/manifold collector, cat, but mostly the muffler(s), etc) is a resonation tube. After about 2-3' of pipe is when it gets particularly droney. I have a video on my page showing just how quiet it is in my truck when I put the mufflers all the way at the very back of the bed compared to the typical location of before the rear axle. Quite a bit quieter inside, slightly quieter outside. Perfect for a daily... But I don't mind the noise, so I put it back in factory location when I got rear ended. Hope that answers your questions
You missed a crucial system of an exhaust system... Back pressure which helps close the exhaust valves!?? Without it and OEM valve springs... you just burned a valve. Be more responsible, Please... ASE CMAT