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my new 5.7 Summit and Corsa exhaust

11K views 20 replies 12 participants last post by  abelseth8 
#1 ·
:D

I recently picked up a 2012 Overland Summit 5.7. I absolutely love it and added a Corsa performance exhaust on day 1. The sound is perfect. Low rumble at no-load and it roars when I get on it. The Corsa really wakes up this HEMI. The previous owner already installed the Mopar CAI.

Here is a few photos - I found another member's picture on this forum and followed his lead on painting the Corsa mufflers black. Great idea...the mufflers are tucked up tight and you can barely see them from behind.

JeepGarage member photo (white):


My Jeep:












I think it turned out great! Highly recommended..:thumbsup:
 
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#5 ·
Nice!...I'm still debating on what type of exhaust to do either corsa or magnaflow....I'm waiting for a hemi over here in NY to fly past me so I can get a real hear for it, only ones I've heard are the srts an the v6s (god only knows) why ppl put systems on 6 cylinder!....you have a video!?
 
#7 ·
From all of my trial and errors over the years, most have found that very few performance exhaust systems are engineered to be 'drone free'. It's especially tricky with the 5.7 “Multi Displacement System” (MDS) feature. Magnaflow will boom when MDS kicks in...and will drone. I believe that only Corsa - or MOPAR performance exhaust - p/n P5155931 - which is identical to Corsa (supplied to MOPAR by Corsa - 2011-2013 Grand Cherokee 5.7L Cat Back Exhaust - Mopar Performance Online) are drone free.

Corsa Performance: Corsa Performance Exhaust - Search Products


I feel compelled to let you know that the Corsa sport cat back system I installed on my '13 Overland raised my 0-60 times from 6.9 seconds up to 7.2 seconds The low end torque is quite diminished. The good news is that over 2000 rpm, the 5.7 absolutely screams. So anything from a roll is fantastic, but dead stop starts are sluggish. In short , the power band has shifted to the higher rpms/speeds. From what I've been able to learn, the 3" pipes used by Corsa are great for reducing restriction (and backpressure), but some backpressure works with the valves to actually increase torque. While a free flowing exhaust is what works best for high speed horsepower.
Just wanted to share my limited experience.....Always learning!
For reference, I am also running a CAI, 85mm ported throttle body, and Hemifever tuning.
BTW....As for the exhaust note... It's awesome!
I agree that the big 3" pipes improve the high end and may compromise torque a bit. Sluggish from a dead start? I'm not feeling a real seat-in-the-pants difference. I'd love to see a before and after on a dyno..I can't find anything from Corsa offering improved HP/Tq #'s...just a claimed flow increase average of 97% gain over stock and 13 lbs. lighter than stock weight reduction..
 
#6 · (Edited)
I feel compelled to let you know that the Corsa sport cat back system I installed on my '13 Overland raised my 0-60 times from 6.9 seconds up to 7.2 seconds The low end torque is quite diminished. The good news is that over 2000 rpm, the 5.7 absolutely screams. So anything from a roll is fantastic, but dead stop starts are sluggish. In short , the power band has shifted to the higher rpms/speeds. From what I've been able to learn, the 3" pipes used by Corsa are great for reducing restriction (and backpressure), but some backpressure works with the valves to actually increase torque. While a free flowing exhaust is what works best for high speed horsepower.
Just wanted to share my limited experience.....Always learning!
For reference, I am also running a CAI, 85mm ported throttle body, and Hemifever tuning.
BTW....As for the exhaust note... It's awesome!
 
#15 · (Edited)
FOR SALE ~ CORSA exhaust:

Unfortunately, it looks like my job will now require me to commute 160 miles - round trip - every day. I will need a vehicle that will achieve close to 40 mpg vs the 21 mpg that I see now. I may put the stock exhaust back on the Jeep and sell the Corsa..unless I happen to find an enthusiast who appreciates the Corsa performance exhaust on the Jeep when I put it on the market.

If any of you may be interested, send me a PM. I'm in the Washington, DC area. It would be a local must-pick-up deal only. Let me know...no rush at all!

## The exhaust was installed at 23,045 miles. I currently have 24,200 miles. Just 1155 miles on the Corsa system.
 
#16 ·
160 mile per day! Maybe you should be looking for an airplane instead of a high mileage vehicle! Have you looked into Rideshare?
Anyway, I'm selling my Overland too...possibly today as a matter of fact. I found that when I took off the Volant CAI system, the ported throttle body, and the Hemifever tune, that the sound isn't much louder than stock, and all that's left is a good quality stainless steel exhaust system that may contribute to improved gas mileage, which was at the least, selling feature, even if I cannot get my cost back.
Anyway...Good luck in the new job! It's always an interesting time.
 
#17 ·
160 mile per day! Maybe you should be looking for an airplane instead of a high mileage vehicle! Have you looked into Rideshare?...Anyway...Good luck in the new job! It's always an interesting time.
funny. i currently have a company car which is the explanation for the low mileage on my JGC. It mostly sits in the garage. New job means I have to will have to buy a commuter car.
 
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