Jeep Commander Forum banner

1 - 19 of 19 Posts

·
Registered
Joined
·
362 Posts
Discussion Starter #1 (Edited)
So, I am looking to upgrade the OEM exhaust on my 2010 5.7L Hemi XK.

All I can find is a cat back for the 2007-2008 (Mopar part number P5153589). I called a Jeep Parts counter and they do not see one listed for the 2009-10. My guess is they are the same still, but how do I make sure?

Maybe I can compare OEM P/N's for all model year Commanders with Hemi engines... and if they are the same the performance cat back dimensions would be the same. Then the only concern is --- did back pressure change for some reason that affected the design for '09 - '10 ?!?

Oh --- the WK and XK have different part numbers! How weird is that? WK uses Mopar P/N P5153364. Crazy stuff.

Any help is appreciated.
 

·
Banned
Joined
·
1,406 Posts
This might be the reason:

Chrysler has made various revisions to the 5.7 L for the 2009 model year. The first for all applications is what Chrysler calls Variable Camshaft Timing or VCT. VCT (Essentially Variable Valve Timing) uses an oil control valve which controls oil flow to a unique camshaft sprocket which contains a phasing device, which depending on the operation of the oil control valve either advances or retards camshaft timing.

Cylinder heads have been revised to increase flow. Though the intake manifold has also been changed on all applications, it is however model specific. Dodge Ram, non-Hybrid Electric Vehicle (HEV) Chrysler Aspens, and non-HEV Dodge Durango utilize an active intake manifold with a short runner valve to optimize torque and horsepower. At lower engine RPM the valve is closed, resulting in improved low-end torque from the longer runners. At higher engine RPM the valve is opened, diverting the incoming air into the center of the manifold. The shorter runners results in improved horsepower. Passenger cars, Jeep vehicles, and HEV Chrysler Aspen & HEV Dodge Durango do not use this manifold, these vehicles utilize a passive intake manifold, which does not have a short runner valve.

I purchased a Mopar cat back exhaust for a 2006 Durango. It was actually a Borla unit, so look up Borla and see if they make one for the 2009/10, and see if it is the same one for 2006/08. Also, the last time I looked, I do know that Borla only makes one for the Hemi, and not the 4.7 :eek:rangehat:
 

·
Registered
Joined
·
2,195 Posts
Oh --- the WK and XK have different part numbers! How weird is that? WK uses Mopar P/N P5153364. Crazy stuff.
.
That makes sense, the WK and XK are not same in total body length and thus the total exhaust length
 

·
Registered
Joined
·
362 Posts
Discussion Starter #4
That makes sense, the WK and XK are not same in total body length and thus the total exhaust length
Ah, I forgot about that important point! Thanks :) .

I see Magnaflow says their design is valid for the entire production run of XK up through 2010, so I want to believe the Mopar (by Borla?) Performance Cat Back will fit the 2010 too --- even though they stop at 2008 in the listing.

I sent an e-mail to Borla to ask too... I hope somebody already knows on here and shares what they learned.

Chuck
 

·
Registered
Joined
·
2,195 Posts
I see Magnaflow says their design is valid for the entire production run of XK up through 2010, so I want to believe the Mopar (by Borla?) Performance Cat Back will fit the 2010 too --- even though they stop at 2008 in the listing.

I sent an e-mail to Borla to ask too... I hope somebody already knows on here and shares what they learned.
I think they will answer positivity that exiting cat back fits 2009 and 2010 ,, the difference is mainly inside the engine. ... this is not a confirmation but anticipation,, lets see what they come back with
 

·
Registered
Joined
·
22 Posts
You should be fine

I had a similar issue. Wanted a catback on my 2010 Hemi. Really liked the Gibson due to full 3 inch system. They don't list it as fitting 2010.
Took a chance and ordered it. Fits perfect. Only difference between instructions and my install was having to cut the old exhaust off behind the muffler to remove it instead of a bolt-on connection there.
 

·
Registered
Joined
·
362 Posts
Discussion Starter #7
I think they will answer positivity that exiting cat back fits 2009 and 2010 ,, the difference is mainly inside the engine. ... this is not a confirmation but anticipation,, lets see what they come back with
Well... I am suprised. See conversation below...

I first wrote:

I have a 2010 Jeep Commander with the 5.7L Hemi engine. I believe Borla may manufacture the Mopar Performance cat back exhaust for the Jeep Commander.

There is no part number for the 2010 Commander via Borla or Mopar. I assume that nothing has changed in the design of the exhaust dimensionally between model years, but any help confirming this (or denying this) would be appreciated!

Reply from Borla:

Chuck:

Thank you for your interest in Borla products. Unfortunately we do not offer a system for your 2010 Jeep Commander. We can get you situated with universal mufflers. If you are interested, we need to know the following about your Jeep:

What size is the inlet and outlet pipe diameter

What is the configuration of the inlet and outlet pipe

What size is your current muffler

Once we get this information, we can recommend universal mufflers for your Jeep.

I responded:

Weird… Magnaflow uses the same part number for the entire production run of Commander. What you say makes no sense… are you really sure?

Then response from Borla:

We have not done any fitments on any Commanders after 2006.

I replied:

Since the exhaust design seems to be the same for the entire run, I think it is safe to assume the 2006 design will fit --- here is something odd, Borla (supposedly) makes the Mopar exhaust for the Commander and they list up through 2008. I think you can understand my confusion.


So far no additional response back. WTF?!? I didn't think I asked a trick question.
 

·
Registered
Joined
·
362 Posts
Discussion Starter #8
I received a follow-up from Borla stating, "The systems we make for MOPAR, GM, and Ford are through our OEM line. This is a different division then the aftermarket. They have their own part numbers and applications. In the aftermarket, which I’m in, we do not show a fitment for the Commander."

Wild, huh?!?
 

·
Banned
Joined
·
1,406 Posts
I just thought of this - I have a 2009 Jeep Commander Accessories catalog. There are two items on the back page - Katzkin Leather Seats and Mopar Cat-Back Exhaust System! I got the catalog to use as a reference if I ever decided to recover my seats. I've never seen the 2010 version. I do know that they only offered the cat-back system for the 5.7, never the 4.7. So, if it was available for 2009, it should fit yours. Since you said it wasn't listed for the 2009 and 2010, I thought it might have something to do with back pressure with VVT. Obviously this is not the case if it was offered in 2009. Go back to the dealer and see if they have a 2009 or 2010 accessory catalog, and have them look it up again. I'm sorry I didn't think of this sooner. :eek:rangehat:
 

·
Registered
Joined
·
2,195 Posts
Chuck1026 ,, unfortunately I think you got stuck with a sales person who doesn't know anything and follow the book.

I suggest to go to the dealer and compare the part #s for stock setup of 2006 and 2010 ,, if they are the same .. then you can go ahead with the 2006 one and install it.

if they part # is different ask them to bring the items with different numbers and check the difference yourself.
 

·
Registered
Joined
·
362 Posts
Discussion Starter #11
Chuck1026 ,, unfortunately I think you got stuck with a sales person who doesn't know anything and follow the book.

I suggest to go to the dealer and compare the part #s for stock setup of 2006 and 2010 ,, if they are the same .. then you can go ahead with the 2006 one and install it.

if they part # is different ask them to bring the items with different numbers and check the difference yourself.
That is a very logical suggestion --- I thought of that too --- but sometimes the Mopar P/N's change even though the parts still fit more than one model year. I noticed the Magnaflow P/N is for 2006 - 2010 Commanders with the 5.7L. Even so, you have convinced me to call my parts guy and check just for kicks.

One additonal question is droan...while researching Borla, some people have been complaining about droan at highway speeds. Now I am trying to find some commentary on that issue!
 

·
Registered
Joined
·
2,195 Posts
One additonal question is droan...while researching Borla, some people have been complaining about droan at highway speeds. Now I am trying to find some commentary on that issue!
I can't help in this as I don't a cat back at all ,, I hope someone will give some answer soon
 

·
Registered
Joined
·
362 Posts
Discussion Starter #13
So I read some stuff about the Borla that made me uneasy and decided to get the Magnaflow 16665 for the Hemi... it has the resonator. Hopefully I will gain some HP, better tone, but no drone (droan or however it is spelled)...
 

·
Super Moderator
Joined
·
14,914 Posts
So I read some stuff about the Borla that made me uneasy and decided to get the Magnaflow 16665 for the Hemi... it has the resonator. Hopefully I will gain some HP, better tone, but no drone (droan or however it is spelled)...
I think you will like the Magnaflow. I am very pleased with mine. Not real loud unless you get on the gas. Has a real nice sound too. Don't think you will gain any HP, or least not enough to make a difference.
 

·
Registered
Joined
·
3,262 Posts
Ah, drone.
Depending on your age (I'm now 60) Drone, or resonance can occur at any speed.
Trouble is, when young, drone is usually interpeted as tone.
V-8s make a wonderful tone.......trouble is, as I've grown older, my wonderful toned vehicles now are interpeted as more of a drone to my ears.
I've said it before.....sound is subjective.....what sounds good to me might not to you and vice versa.
When I say any speed, I mean any steady speed. And what you might interpet as tone I may interpet as drone.
This is why the manufacturer spends so much time tuning exaust......a balance is made so that backpressure is minimal, but so to, noise.
My 07 4.7 has no resonator....I don't think the 06 4.7 did either.
To my ear, it allows a bit of tone, bordering on drone but to me, not objectionable.
Maybe folks complained or maybe it was to cut cost by using more resonators but the 4.7 got the entire 5.7 system along with the resonator in 08.
Or maybe it was to accomodate the 4.7's power increase with attendent noise.

Any low restriction exaust will have drone......you just have to hope it is not too intense at the speed (RPM) you drive at the most.
The Borla may be a bit worse than another brand at the same RPM but all resonation will happen at the same RPM.....

I know what you are going through though......I won a 50% off coupon from my Impala club for any Borla system.....both my Impala's have Borla, my truck has Gibson, my Camaro has SLP.
That leaves the Commander, the SRT8 Magnum, the Miata, and the SC T Bird stock.
I'm up in the air.....Borla makes nothing for the bird so that leaves three.....
I'll keep thinking about it.

Rob
 

·
Registered
Joined
·
362 Posts
Discussion Starter #16
I think you will like the Magnaflow. I am very pleased with mine. Not real loud unless you get on the gas. Has a real nice sound too. Don't think you will gain any HP, or least not enough to make a difference.
Okay, maybe no HP gain that is noticable, but nice tone would be good.

Ah, drone.
Depending on your age (I'm now 60) Drone, or resonance can occur at any speed.
Trouble is, when young, drone is usually interpeted as tone.
V-8s make a wonderful tone.......trouble is, as I've grown older, my wonderful toned vehicles now are interpeted as more of a drone to my ears.
I've said it before.....sound is subjective.....what sounds good to me might not to you and vice versa.
When I say any speed, I mean any steady speed. And what you might interpet as tone I may interpet as drone.
This is why the manufacturer spends so much time tuning exaust......a balance is made so that backpressure is minimal, but so to, noise.
My 07 4.7 has no resonator....I don't think the 06 4.7 did either.
To my ear, it allows a bit of tone, bordering on drone but to me, not objectionable.
Maybe folks complained or maybe it was to cut cost by using more resonators but the 4.7 got the entire 5.7 system along with the resonator in 08.
Or maybe it was to accomodate the 4.7's power increase with attendent noise.

Any low restriction exaust will have drone......you just have to hope it is not too intense at the speed (RPM) you drive at the most.
The Borla may be a bit worse than another brand at the same RPM but all resonation will happen at the same RPM.....

I know what you are going through though......I won a 50% off coupon from my Impala club for any Borla system.....both my Impala's have Borla, my truck has Gibson, my Camaro has SLP.
That leaves the Commander, the SRT8 Magnum, the Miata, and the SC T Bird stock.
I'm up in the air.....Borla makes nothing for the bird so that leaves three.....
I'll keep thinking about it.

Rob
Thanks for lesson! I was not going to change the exhaust, but last week my OEM exhaust was shortened when a S10 Blazer was rammed up my XK's backside by some goofball kid in a full size GMC pickup (he was doing something other than following the golden rule of driving, "look where you are going - not where you have been").

Anyway, courtesy of Mr. Goofball, I am getting a new rear bumper cover, impact bar padding and a new Magnaflow exhaust (just a few bucks out of pocket from me to upgrade from OEM, so now is the time).

I will report back with my thoughts on sound. My fuel economy will be horrible until it stops snowing here... I am constantly stuck in traffic with no escape... slow going people with poor equipment and driving skills to match, ugh...

Oh well... as long as I do not get hit again, it's all good...

Chuck
 

·
Registered
Joined
·
362 Posts
Discussion Starter #17
So I got my truck back from the body shop tonight (too dark to photograph) but in addition to the nice new bumper cover (good as new, hoo-ray), I have added the Magnaflow exhaust (paid for by the other driver's insurance for tagging me) as well as the nice Mopar recovery hook (that my wife gave me for XMas) installed.

It sounds nice! I like the subtle rumble at idle, no droan (drone?) while cruising and when I stand on it, the Magaflow lets the Hemi make itself heard.

The new tip looks great too. Having the rear recovery hook means I can now be tugged out of trouble by the front or back... in case I ever go wheeling :) .

I will try to get some pictures in the daylight.
 

·
Registered
Joined
·
362 Posts
Discussion Starter #18
Okay, as promised, here is the newly modified rear end with rear recovery hook and Magnaflow exhaust... I am very happy with both mods.

 

·
Banned
Joined
·
1,406 Posts
Looks good. I'm glad everything worked out for you. :eek:rangehat:
 
1 - 19 of 19 Posts
Top