Derf00

you're not serious are you? You're telling me that adding a muffler (not even a catback system) by itself will add 12-13 flywheel horsepower? Do you have Dyno Slips?? And I mean both with a Baseline (stock) car and then with just the muffler added (as in no other mods, no CAI or anything else)?

I can understand a muffler adding 10rwhp if there are other mods but just a muffler on a stock car...?

Add: Okay I read your website, you are definitely NOT STOCK..so 10rwhp is not out of line. But for a stock car you MAY get like 3-4 RWHP for just a muffler..not 10.

Thomas Ford

They are only Ricey if they are "Fart Cans". Flowmasters or similar are fine.
Tom

8cd03gro

if im not mistaken his car was almost stock if not completely stock when he did that dyno.

Derf00

I'm too busy at work to go back and look but If so then he probably did a TUNE and Muffler. 10RWHP for just a muffler...maybe on a vette or Mustang GT (since there are two mufflers on there) Not a V6 tho.

8cd03gro

actually the muffler is the most restrictive part of our exhaust and you will only gain 2-3 hp by going duals. Beleive me there has been ALOT of discussion on this.

plus the mrt is completely straight thru. You can look right thru it.

rmays06

No not ricey at all..... Just go with any one of the aftermarket brands out there and you should be alright. There is many that make them for our car. IMO if I had to do it over again ( I went with the JBA) I'd get ford racing or flowmaster.....JMO though.

8cd03gro

it's all in preference. If you like the stock sound, don't spend the money. There are other mods that will give you more power per dollar. If you want ALOT louder, go mrt. If you want slightly louder, id say magnaflow. I think jba is a bit louder than magnaflow, and same with the borla/ford racing. Whatever you get, i think you will be happy with the results.

scrming

Ok... you have every right to be skeptical! Believe me I was too... So... I will try to offer you some solid proof...

Justin at VMP tuning in Florida did some dyno testing on his wife's car. He showed and 11RWHP gain simply by removing the muffler! He put on a GT take-off muffler and it went from 11RWHP gain to a 10RWHP. So that goes to show just how restrictive the V6 muffler is! Now I had a Magnaflow single axleback... We never dyno'd it seperately BUT we figured it was good for about 10RWHP, which just so happens to be what Justin found with a GT take off! So again the stock muffler suck.... good aftermarket or even GT take off is good for 10RWHP... I know it's hard to believe... so here is a link to Justin's write-up:

http://www.v6power.net/vb/showthread.php?t=25551

Now the thing about Justin's right up is it also included a CAI which might have helped...

Now here's another example that is more to what you are asking. Check out Lidio from Alternative Auto's write on on the V6. This was a completely STOCK V6 automatic... Unfortunately he didn't publish dyno sheet for it but here's what he says:

"Although it’s not shown here on a dyno graph we also tested a better cat-back exhaust system for the V-6 Mustang and found an unbelievable 10 horsepower at the rear wheels from about 4000 rpm up. The exhaust system with our tune ended up producing 190 RWHP. I must say that at 190 RWHP coupled to the new 5-speed automatic, this new V-6 Mustang feels very impressive all around." (http://www.alternativeauto.com/prods...tang_tune.html)

Even Lidio was surprised at the 10RWHP gain! So there you have 2 very well respected shops saying they seen 10RWHP with with a new muffler! And like I said while we never did an actually test on my Magnaflow we figured it added about 10RWHP....

Now... enter the MRT Aero-Turbine. When we put it on I could not believe the difference in performance it made! I was so impressed I paid for dyno time at Alternative Auto to verify that my butt dyno wasn't out of whack! Now we did not have the luxury of back to back testing... however we did our best to do as fair of a comparison as possible! We made a number of pulls with the MRT and compared them to a number of pulls we had with the Magnaflow.... Again, I understand it is not scientific... BUT in my mind it was a very fair comparison... The MRT beat the Magnaflow hands down! The impressive part is at just over 5500 RPM... notice how the Magaflow's HP drops while the MRT Aero-Turbine doesn't drop as fast! That is the science behind the Aero-Turbine.. LOL! Here' the MRT vs Magnaflow:



Trust me... I thought the Aero-Turbine mumbo-jumbo sound too good to be true... I was a big time skeptic... but after the first couple of romps on the gas pedal I was a believer! LOL!

scrming

Well...... yes, some people can't stand the MRT at cruising speeds.... some think it's ok... some turn up the stereo... LOL! As for me with my 4.10's my cruising RPMS are a tad bit higher than most so i don't have the drone... Personally I love the sound of the MRT! If you get the MRT and decide it is to much you can add a resonator... I heard one for the first time last week... I think it would solve any issue you have with drone...

For automatics.... you might want to consider Alternative Auto (www.alternativeauto.com) for an x-cal2/C&L cai combo...

ricekiller06

getting a muffler will not do anything to your gas milage. i have a muffler and an intake, my gas is only for the better when i drive ok. go get a flowmaster or something, they make a bolt on no welding or fabrication needed.