Well the resonators worked with the stock exhaust system to reduce DRONE! May want to consider since you are using those big loud mufflers!

 

Yeah. There's a little more to it than "big loud mufflers."
Exhaust is a science and not really the black art it's made out to be.
I've got 2.5" pipes, 2.5" tailpipes and Flowmaster's "big loud mufflers".
No drone.

The difference is, my system was done by someone who knows what
they're doing.

 

I agree. No point in running the Flowmasters with the resonators. The Drake set up and the Turbo's would most likely be your best bet. If your handy at all you should be able to install on your own. A professional installation for the exhaust system is a beautifull thing. I used Hanson's, San Diego, for my 69's dual exhaust. Flowmaster 40's with staggered shocks. and think it's just great. Brian

 

Don't confuse "loud" with "drone". The mufflers will make it nice and loud, if that's what you want. The drone will make you wish you'd bought the resonators the first time you go for a one hour drive. The resonators will deepen and mellow the tone of the tailpipes.

 

I was clueless when I had Flowmaster 40s installed on my '66 coupe (2.25 inch pipes behind reproduction hi-po manifolds). When a friend of mine offered to weld some small used resonators near the tips, I decided it worth a try given the zero cost. In my case, they effectively eliminated the drone (with all respect to others who have not heard the necessity I did). Unprompted, my wife mentioned the improved sound quality the first time I drove it home.

 

I think I will get the system with the resonators and try the Turbo mufflers that comes with it first, before I shell out $220 for the Flowmasters, to see what it sounds like.

Thanks for the input.

 

Resonators change the RESONANCE in the exhaust system. Resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at a specific preferential frequency. Increase of amplitude as damping decreases and frequency approaches resonant frequency of a driven damped simple harmonic oscillator.

 

Which is why the Arvinode exhaust system (root word "node") was able to function with no mufflers at all. It did, however, have resonators.

 

...That's what I always say

 

In my experience and extensive research (read; blogging) fighting the dreaded drone, IMHO, resonators fix the drone on a poorly designed system. Big issue many build into their systems is reducing the pipe side south of the muffler to make it easier to get around shocks, third member etc. That creates a node in the system to resonate. Just like the ocean, waves travel on the medium regardless of the direction of the flow of the medium. When you hit the right RPM/frequency, resonance occurs. I went from 2.5 to 2.25 in an ignorant phase of my mustanghood. 2nd, get the sound out from under the car, tailpipes 2" past the valence, since the valence tucks back under the car from the bumper, 2" looks good when measured from the actual edge of the lip.That way the sound is not magnified inside the cabin. My old system dumped so you could just see the end of the pipe under the valence at a 45 degree angle. I had mind-numbing drone but its all gone now. I also used mandrel bent tubing to make sure I had no other nodes in the system.

 

Drone is a resonance, a sound wave. Anything you do to the exhaust, will effect the frequency of that exhaust. So a resonator could remove drone, or it may not. Too many variables. Going from shorty headers to full length headers removed drone I had one time. The rest of the exhaust stayed the same, but the drone was gone.