The stock system is clamped.
Getting an axleback system will be a home swap.
I find this VERY cool.

 

I'm hesitant to buy any catback system yet since I haven't seen any dyno charts of even heard the exhaust!

What will the power difference be with the axle back vs. the full catback?

What's the difference with just magnapack mufflers?

I might just end up buying mufflers and tips if the piping is already ideal. Also have to wait for Bassani and Borla.

 

all I know is that the stock tips don't look half as good a rolled 4" tips like the borlas I had on my mach 1.I think the magnaflow on the '05 looks great.

 

I'm awaiting the Stingers. I'll probably have them before i order the car.

If you don't know much about exhaust, best wait and hear them before making a decision.
I'll go blindly into borla, as I have them now, love their work, love their sound, and have perfect faith that they'll make the 05 sound wicked.

Personally I see not much difference in the catback/axleback, if you notice its JUST piping. Unless its smoother on the inside and contains less humps/turns than the stock mandrel bent 2.5" exhaust....there is really no reason to replace that.
Before the reasoning was...you were dealing with a 2.25" crap bent pipe, going up a step to 2.5" and having mandrel bent (for those playing the home game...Mandrel bent piping keeps the SAME diametre of the pipe even in a turn, most turns loose diametre in the pipe, do to the crimp)

The only reason I'd really care to see a dyno chart is if I was SO **** about performance gains between brands...which I'm not.
I want it to sound louder, and meaner...if I get power out of it ... that to me is a bonus.

 

I'm thinkin' they aren't going to give more than 5 RWHP, so you have to ask yourself if that money can be better spent on other mods... take $100 and go to a shop with a chasis dyno and reflash the chip for an extra 30 horses and then spend the other $300 on 2 new tires for the rear.
I heard one when they were touring the country last spring, and I gotta tell ya, I wasn't impressed by the sound outside the car. I figured I was driving straight from the dealer to the muffler shop. After watching the video that was on this forum for a test drive, I think it sounds great on the inside... but that's what they were looking for. When they engineerred it, they were looking for the sound on the inside of the car, not really how it sounded from the outside. I'm definitly swappin' mufflers.

 

For stock..it sounds good....great even.
But lacks the volume (which is understandable...its a stock car)

I love how the aftermarket companies tune the sound.
Which is great because, the have a better sounding car 'engine to the tips' this time....Ford sound engineered the car/engine...not just the exhaust.
I bet with some great mufflers/headers etc, this will be some of the MEANEST sounding mustangs around.

Whats even scarier.....is the next cobra. IF it does infact have the 5.4!

 

i just wish that they would put up sound files already on the different muffler sites...I want to hear what sounds better the flowmasters (my favorite) or the magnaflows

 

so all the cat-back includes is the mandrel bent pipe, mufflers, and tips?

And the axleback is sans the mandrel bent pipe?

Is the stock pipe "mandrel bent"? AKA...are there crimps?

EDIT:

Whoops...try reading Richard:

"From the factory, the catback is already a 2.5" mandrel bent system so this allows you to only upgrade the muffler system from the axle back."

So why would someone spend the extra dough for the catback system...if the stock 05 already has mandrel bent?

 

Maybe the aftermarket Cat's flow better? It's the only reason I think they would offer them.

 

I don't think the vatback system comes with cats....hence...

CAT BACK.

I dunno, does anyone?

 

Back pressure doesn't build torque! Back pressure is negative torque.

Here is the best example I can come up with...

jump up and own about three times or until you can get some idea of how much force it takes your unladen body to achieve whatever height your jumping too.

Now repeat the jumps, but this time strap a frozen tukey to your head.

Notice it take more effort to acheive the smae distance. This is what an engine experiencing backpressure sees.

Larger pipes do however kill gas velocity and that is more than likely the culprit when it comes to lost performance. Kill velocity and the cylinder cannot efficiently scavenge itself which would reduce the usable cylinder volume which could be filled with an air/fuel mixture.

 

Exactly...why would you waste money on a catback, if an axleback has the same gains?

If the bends are more effeciently routed etc...then yes...that would be the reason.

I'd personally save the money...undo the clamp after the axle, replace the mufflers myself....clamp new Borla's in, and hit the road.
Its cheaper, easier and no cost of installation

 

BRRRR...my head is cold now...ok...now what?

 

I would have gone with the "suking a turkey through a straw" analogy, but straping a frozen turkey to your head would work I guess...

 

so are we in agreement that the cat back system is a waste, because it includes piping that is already present on the stock car?

yeah....bout ready to order the axle back.

Whats the difference between the Magnapacks and the regular Mufflers?

 

I believe, and someone can confirm, that the Magnapacks are louder.

 

This is stupid, but I know that offroads are louder, are offroads illegal, hence "offroad"?