Hi, I have just installed the or prochamber and I have the mac axlebacks. I was very excited about this install but man is it a big difference! It can sound good but the drone is very intense. I have resonators installed to help with trumpet and make it a little quieter but that didn't seem to do much good. You guys have any opinions on what I could do? Get cats installed? Thank you.

 

yeah high flow cats will help it some. i have long tubes with o/r prochamber and axle backs and the drone can be a little crazy but i like it.

 

Does yours bog down after you let off the pedal bad?? Just a droney sound like back pressure or something..I don't hear it on the videos I've seen

 

yeah mine has that sound also. took it out with my custom tune though. but now the car do decelerate right when i down shift so i got to get it tweaked.

 

I have a custom 93 octane Brenspeed too...anything I should try and fiddle with to fix it?? Thanks

 

no, the tuner has to do it.

 

Mac and borla s seem to be the drone mufflers when coupled with something other than stock cats. Maybe try a different muffler..

 

Hey Violator187,
I had an 07. I put gibson mufflers (chambered style axleback like your mac's) on it. When I put the O/R Prochamber on it was incredibly loud and deep but the drone was terrible. Cold starting the thing would wake the dead. I immediately took off the gibson's and ran stock mufflers. Wasn't really that loud, but sounded really good. Check out my video below for an idea of stock muffs and o/r prochamber.

Click Here for Video

That wasn't enough though, so I ended up with Borla Stingers. I don't have any videos with them unfortunately. But this by far was the best sounding combo in my opinion. It did drone a bit but not even close to what was coming out of the gibsons. It was very livable if you ask me.

 

Wow, hmmmm.... man! Well you'd think that MAC mufflers would go perfect with MAC prochamber!! LOL I mean come on Mac! Just fustrating. Luckily I gotta great deal for the mac axlebacks on mustangforums. Just might have to check out some good deals on the borlas. So the Macs are a different style than the stingers?? Thanks for your input tho!

 

Yeah, the borlas are a 'straight through' style muffler meaning you can see daylight through it if you held up the muffler. Flowmasters, macs, gibsons are all chambered.

 

you are gonna get drone with most chambered mufflers. if you dont want drone go with straight through mufflers like magnaflow.

 

If you want little to no drone go with GTAs, Maganflow (not magnapacks), corsa, MBPR, or JBA. I ran magnapacks with a prochamber and hi-flows and that set-up droned.