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Old 11-21-2014, 11:59 AM
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Just installed CORSA Cat Back on my 2015!

PURCHASE - After confirming with CORSA that I would receive full support and full warranty, I purchased the system from AMAZON for $1585.65 to my front door with two day delivery. Arrived in two boxes, both in perfect condition.

INSTALLATION - Finished installing a CORSA Cat Back exhaust system (part # 14466) on my 2015 SRT this week. Took me two days because I did it without help in my garage while the SRT was on jack stands. Being 70 years old did not help. This is the same part number as used by the pre 2015 models, but there is one part in the kit that you don't install on a 2015. The kit includes a "Back Pressure Sensor Restrictor" which was used on previous models. This is just a hose with a white barbed restrictor attached to it which was installed in line with the sensor hose on pre 2015s. There used to be a sensor tube welded to the exhaust about 8 inches in front of the suitcase muffler on the passenger side. The restrictor was added to the hose that was attached to the tube. The 2015 does not have this. I could not find anything attached to the exhaust after the Cat. I assume this was removed when the flapper vales were removed from the exhaust pipes. I don't know how the back pressure sensor works now, but it is obviously different. The other change I made was to cut one half inch from the x-pipe rear exits where they join the tailpipes. I did this because I did not want the tips to protrude as much as they would have otherwise. One half inch is about all you can remove and still get a good fit to the tailpipes. Standing above the bumper and looking straight down, the tips protrude about one quarter inch when cold and about one half to three guarter inch when hot due to thermal expansion. The exhaust hanger rods, which the exhaust grommets attach to, have a slightly larger head on the CORSA system than those on the SRT. Because on that, I installed the grommets on the CORSA first, and was able to reattach the grommets to the SRT without much difficulty. I used a 50 - 50 mix of car wash and water as a lubricant. The only other problem I had was getting the tips centered in the outlets. It would have been easier for two people. I loosened the x-pipe to tailpipe connection, positioned the tips where I wanted them and strapped them together with a luggage strap. This worked well since both tips were too far to the outside edge of the outlet. After tightening everything back up and torquing to 45ft-lbs I removed the strap and the tips are perfectly centered. Before installing the CORSA system, I primed everything from the rear axle back except the tips with 2000 degree primer and finished it with 2000 degree flat black. This basically makes the bright stainless of the rear muffler assembly disappear when you are following the SRT down the street.

SOUND - I wanted a more aggressive idle, more aggressive acceleration, and quiet the rest of the time. If you want to hear the exhaust at all rpms and speeds, you would not like this system. On the other hand, if you want a noise free exhaust at steady state rpms and speeds, but a more aggressive sound when you get into it, the CORSA system may be your only choice. The throttle becomes an on/off switch with CORSA system. At steady state rpms and speeds such as 30 - 45 around town or 75 on the highway, there are no annoying sounds, in fact it is almost identical to the stock system. Every time you press the accelerator, you are going to hear it. Perfect for me, may not be for you. MDS has not improved. Just as bad with CORSA as it is with the stock system. I wish there was a way to run in Auto mode with MDS completely shut off, but unfortunately there isn't. I have not had the opportunity to go on any long trips, but I have driven some around town and about 50 miles on the highway with no CEL or diagnostic codes being set. I am keeping my fingers crossed.

Sorry for the long post but I hope this helps anyone who is trying to decide which exhaust system to purchase. For an old man like me, CORSA was the perfect choice. If you like it loud all the time, do not even think about this system.

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  #2  
Old 11-22-2014, 09:58 PM
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Re: Just installed CORSA Cat Back on my 2015!

I just realized that I did not state that I drive in sport 95% of the time. I do not want to mislead anyone. If you drive in auto all the time, MDS becomes more of an issue. When decelerating in auto, and MDS kicks in, it sounds terrible. Switch to sport, and the sound is great, crackling back through the exhaust and etc. Let's face it, MDS just destroys the exhaust sound of this vehicle. I'm not sure what "Active Noise Cancelation" is supposed to do, but it doesn't solve the crappy exhaust sound that MDS creates. If someone could discover a way to completely disable MDS, I would stand in line to by it.
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Old 11-22-2014, 10:47 PM
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Re: Just installed CORSA Cat Back on my 2015!

Sounds similar to my Stainless Works full system (headers/hi-flow cats/catback). Quiet at idle and cruise (can't even hear it on highway), but screams at WOT.
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Old 11-26-2014, 07:47 AM
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Re: Just installed CORSA Cat Back on my 2015!

Quote:
Originally Posted by dldoom View Post
If someone could discover a way to completely disable MDS, I would stand in line to by it.
you can do this today with the Trinity tuner. even works with stock tunes...
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Old 11-26-2014, 09:25 AM
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Re: Just installed CORSA Cat Back on my 2015!

Quote:
Originally Posted by BozFromOz View Post
you can do this today with the Trinity tuner. even works with stock tunes...
Diablo Trinity doesn't work on the 2015 yet...
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Old 11-26-2014, 04:01 PM
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Re: Just installed CORSA Cat Back on my 2015!

When I picked up my 2015 in September, I called Diablo to ask when their tuners would be available for 2015. Probably be mid 2016 before a reliable tuner is available from them. Any other ideas? I have not been able to come up with any way to shut it off. Sure wish I could. Thanks for your response.
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Old 11-26-2014, 04:13 PM
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Re: Just installed CORSA Cat Back on my 2015!

I spoke to Johan at Diablo a few weeks ago and though he did say no official ETA for 2015 support he did say they WERE working on it and implied availability early 2015...

I would say probably late Q1, 2015 but that is just a wild guess...
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Old 11-26-2014, 06:10 PM
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Re: Just installed CORSA Cat Back on my 2015!

I sure hope you are correct. I am still seeing problems from forum members with the 2014 support, so only time will tell I guess. Seems to me that the 2014 and 2015 are so similar, that once everything is working correctly on the 2014, it should be almost the same for the 2015. Probably not nearly that easy though.
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Old 12-04-2014, 03:57 PM
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Re: Just installed CORSA Cat Back on my 2015!

Just wanted to update my experience with the CORSA Cat Back system. My comments are related to CORSA part number 14466 installed in a 2015 SRT. The same system installed in a pre-2015 may give different results because the flapper valves in the exhaust are no longer on the 2015, nor is the Back Pressure Sensor behind the cat on the passenger side.

(Selec-Trac in Auto, Gear Selector in Drive, Active Suspension in Touring Mode by default) - System sounds really good at idle, acceleration, and steady speeds. On the highway at 70 -75 it sounds like the stock system, even if ECO On button is pressed. At 80 you can really start to hear the exhaust and it gets louder from there on up. Deceleration however, creates a booming sound if MDS kicks in. This is true if ECO On is pressed or not. This is not a pleasant sound that you want to hear every day.

(Selec-Trac in Auto, Gear Selector in Sport, Active Suspension in Touring Mode by default) - System sounds great. No booming on deceleration. This is the setting to use if you want the best ride and also want to enjoy the exhaust sound. No unpleasant sounds in this setting.

(Selec-Trac in Sport, Gear Selector in Sport by default, Active Suspension in Firm Mode by default) - System sounds even better because of the more aggressive shift pattern that Sport Mode offers. This setting provides the best sound but also has a firmer ride.

There is no drone in any of the above settings. System fits perfect and there are no rattles or problems of any kind. I have not received any diagnostic codes. Since I have only 1300 miles, I have only done one 0 - 60 which was 4.4 not using launch mode. I do not have any other modifications, so I happy with that for now. I can't see any down side to this exhaust system on a 2015 unless you want it louder.
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