mopar cat back or MPx full 3" turbo back

Mopar 2 1/2" cat back ($400)or MPx full 3" turbo back ($720) with duals?
pros and cons to both? besides the $320 price difference.

 

I have the full mpx 3" cause I got an aftermarket turbo oh:
But yeah, the mpx exhaust sounds really nice

 

My wife has the MPx 3" Turbo back with no cat and its awesome, but her's is an S3 with full bolt-ons and port work.

My car I have the Mopar/Borla exhaust with a Needswings V5 downpipe.

An exhaust is an exhaust as long as it has minimal to no restriction and you gain from it. I like both so its hard to tell you which route to go. Either one will net you performance gains as these cars need to breathe and any aftermarket exhaust system helps as long as its within spec.

 

I had a Mopar exhaust on my car before I went big turbo and thought it was a great exhaust now I have the MPx 3" turboback with catless downpipe cause I needed a full 3" exhaust. Noise wise, I would say the MPx without a cat is much louder over the Mopar with a catless Needswings downpipe. My Mopar exhaust is actually up for sale if your interested plus my Needswings catless downpipe.

 

MPX all the way it's a very well put togather exhaust awesome welds thick wall and it will never rust and I have it and love it

 

thanks for the offer but since i live in california i get to smog my car and i am not taking the risk of a catless system with cops around here. That is why i was leaning toward the full 3" turbo back with a cat from MPx. the mopar one is really nice but it will only be a 1/4" difference. plus by teh time you add a down pipe you are at the price or close to as the MPx.

 

I would have to disagree on the welds comment. The welds are clean yes but they are not thick. I have had the downpipe section re-welded and now I have to get the rear section where both end pipes meet welded as it cracked as well at the weld. Others have had the same problems, the exhaust looks great but the welds are too thin and weak. Other then that the exhaust is GREAT!

 

The welds are not weak they are tig welded and that's the best kind of weld and mine has been perfect and problem free for over 2 years now

 

Mine has over a year or so on it. Plus I live in the harsh midwest. No cracks yet.

To the OP, don't get the dual, get the single outlet. ITs cheaper and does the same thing. Who wants duals on a 4 cylinder anyways?

I know I know it comes stock with duals. Duals do look great though on our cars.

 

They are weak. If they weren't then how do you explain the cracking? I haven't been the only one with the cracking/breaking of the welds issue, you can find threads on srtforums. I even had a performance shop look at it and they said the welds are thin and weak and even showed me. You run the single so maybe that's why but IMO they are weak. It can be the "best" weld out there you can get but it doesn't mean its welded great. I will take pics when I have a chance.

Dual FTW! Canisters belong on cars meant to run those. I have no problems if someone runs a single tip but these cars look ugly with a can hanging out the back. This coming from a guy who always got canister style exhaust for all my previous cars except for this one. IMO it just doesn't look right .

 

Could the cracks be caused by environment? I know you both are in florida, maybe one is closer to salt water then the other making the metal corrode more? Or I know figs yours is a DD I dunno about Goats, also isn't your car outdoors too figs?

Nothing wrong with either scenario just shedding light on the subject. After I spent a winter in Ohio i know it was night and day under my car between being in NM and spending a winter in Ohio...

 

The car sits in a carport most of the time. Besides driven to work. In a year we put only about 7,000 miles on it.

Its seen saltwater once when we had a wind storm here and was driving across the bridge out here. The cracks were there before this though. Car is far from the shore overall.

No surface rust, just straight crack, open welds.

 

Ocean liners are welded together aren't they?

 

Yea but thats completely different metals and the whole structural integrity of the 2 objects. First off no the exhaust shouldnt be breakin welds... This is the welders fault... I work in a shop all day with 2 welders that stick weld mig weld and sometimes tig, This is pipe and 1/4 mild steel plate. 1" to 16" flanges, couplings etc... Now this type of failure on the exhuast can be cause of 2 things... Amount of gas needed to penetrate the pipe and heat. If you lack both of these it doesnt matter what kinda of welder you are it will be weak... First off ive never heard of any bad MPx 3" full backs breaking cracks or any failure. Now Oceanliners have some serious welding there and much thicker steel and much more HEAT to penetrate that steel.



Also on the comment about the single exit vs dual tips...DONT short change the way its meant to be and go with the duals... the rear bumper was made for it and the single looks cheap and ricer like... Its just dumb...

 

^Thank you, I agree with what you said.

 

The duels are wayyyyyyyy to loud cause I had them already and than I went single tip and it looks good

 

As long as the single tip doesn't ahve a JDM angle to it and sits out its fine IMO or I would of never ran a single tip.

 

I've heard that hi-flow cats often fail emissions. It's also my understanding that you don't really need a 3" exhaust if you're stock turbo unless you're really pushing the envelope on it. The area of the 2.25" exhaust is about 4 sq. in., while that of the 2.5" is 4.9", which is not an insignificant increase.

 

why not just do a needswings downpipe with Electric cutout.

 

how about teh maxxfab 3" kit?