I have been in both setups on a 4.7 and have also heard a Ravin but not driven one with a Ravin system. It is between Magnaflow and Flowmaster I can't seem to make up my mind - so can I get some opinions on the to systems It's hell when you get old LOL.I have a 2003 Dodge Dakota and I am looking at putting on a new Exhaust system. Had this system on another 4th gen years back and I just don't remember it being this loud. I don't know, as I get older I get sick of the noise and I've been slowly taming the exhaust systems down a bit, which is kind of funny because my wifes 4th gen camaro needed a new system recently, and I went with the 4' Mufflex system with a 4' Magnaflow muffler,and now it sets off car alarms So I'm doing a cone style resonator in the tailpipe to tone that down a tad. I run this exact same system on my 71 ventura Sprint (uses the same style muffler setup). But I'm going for the Pypes transverse muffler system with the X-pipe for a little quieter and more refined sound. It's an old Force II system that Flowmaster doesn't make anymore, and is much quieter than the American Thunder system that has since replaced it. I'm changing out the other car with a complete Flowmaster kit that I've had on the car since the early 90's, a 70 formy that uses a dual system with a single tranverse Flowmaster muffler at the rear by the gas tank, and also has an H-pipe. It's not nearly as loud as you would think, and actually sounds sweet under power, that X-pipe makes all the difference. I still run a pair of Super 40 Flowmasters on my big block chevelle that makes 640 HP, and that's another dual 3' system complete with tailpipes but with a Dr. Wow what a difference, I get comments all the time on how good that sounds now. I used to run a pair of 2 chamber flowmasters on my 454 pickup with long tube headers and dual 3' pipes complete with tailpipes, you could hear it coming for a couple miles Put an H pipe in later and that tamed it slightly but after years I decided I wanted quiet, so I removed them and installed a pair of stainless Pypes Street Pro's. Yeah, I only care for the flowmasters if I use an H or X in the system, seems to tame down the resonance and cackle a bit and give them a more refined sound. high flow or not, the sound is enought to make me switch these things out before I ceramic coat the entire exhaust. Long story short, I don't care for the sound at all.very dissapointed. Its a 500 HP 468, Sanderson 3/4 headers, 3' exhaust front to rear exiting out the back behind the rear tires, going thu Flowmaster 50's (I believe). I started my '73 for the first time this past week.

To make life easy: Choose based on sound you like and forget about tuning if you can't measure changes. Important for the exhaust system performance for your engine and your desired RPM peak performance range are (simplified explanation): Exhaust valve porting, the header type and their length, distance between exhaust valve and x pipe, diameter of the tube, muffler. The whole system should be setup so that the flow not only goes through easily, but also in a way that maximizes the harvesting effect (and sound dampening of course ). This allows for tuning of the engine to perform OK for the whole RPM range and to work great at a specific RPM range.ДЄll of this muffler talk is completely obsolete if you make any mistake in the rest of the exhaust setup. On targeted RPM ranges however, you can get flowmasters to create an accelerated flow at a very specific RPM. If you measure the flow with a modern bench and computer simulated inflow, the flowmaster and magnaflow will flow equally good. However, this is due to the continuous flow being pushed through and it is not comparable to the use of the muffler on a car. On any 'old-school' flow bench the magnaflow will easily outflow the flowmaster. I am not a fan of one or the other, but this statement is not right and should not influence your judgement. I run dual 14' Magnaflows, x-pipe, true dual, and Chevelle headers.

Magnaflow vs flowmaster