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  #13  
Old 04-14-2014, 10:54 PM
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Re: srt8 exhaust comversiona GC overland

Make the notch as deep and wide as possible.

If you have the mid pipes, good luck with them! I could never get them to fit properly on my AWD. The transmission pan and transmission support will rub the mid pipes, you can angle them a certain way to clear the transmission pan by the slightest of margins, but you then have to drop the tranny support... and then drop the muffler inlet... pain in the butt.

If you know a good muffler shop I would cut the mid pipes apart. Leave the flanges and piping that enter the cats... plasma cut and remove the dual walled piping after each cat. This will separate each cat and at this point you can easily position the driver side cat to clear the transmission pan.... i did it... but I never got around to finishing the process of welding it all up. Have the muffler shop install each cat to the jeep and tack weld some mandrel bent 2.5'' pipes to the Cat outlets that will wrap around the pan and clear the transmission support member and run it straight into the SRT exhaust... you can reuse the muffler flanges or weld the mids and muffler toegther. When everything looks right have them weld it all solid and your good to go.

I think some other guys have done the SRT manifolds and mid pipes, but they have 2wd jeeps that have a different 545rfe transmission pan that is much shallower with no bulge where the spin on filter sits. I changed the fluid on my buddies Nag1 jeep and that pan is really, really shallow and completely flat.

You can have the muffler shop try and fit the mid pipes the way they currently are, but your clearances will be really, really tight. It is not good to have a 1000 degree cat converter with 1/10th of an inch clearance from your transmission pan, and dropping the transmission support is wrong because it will change the geometry of the drivetrain.

Don't lose heart though, because what I told you will work... i got as far as tack welding the 2.5'' piping after the Cat outlets and managed to get them up and over the transmission cross member, but ran out of piping and called it quits and installed my custom system.
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  #14  
Old 04-15-2014, 12:29 AM
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Re: srt8 exhaust comversiona GC overland

Allright man thanks allot for all the help i was about to start duing it myself tomorow but now im thinking twice about it. I mite just take it to a shop and see how much they would charge me to do it. And thaks again for the heads up


And also do u think this is enough of a botch for the egr?
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Old 04-15-2014, 12:30 AM
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Re: srt8 exhaust comversiona GC overland

I also cleaned them up a lil 😉
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  #16  
Old 04-15-2014, 04:50 AM
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Re: srt8 exhaust comversiona GC overland

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Originally Posted by xvalencia View Post
Allright guys im getting ready to do the exhaust now just waiting for the dealer to give me my car back, but got the gasket and was going to start the header notch but this gasket has 2 ports. Does anybody know wich one it would be??
Here is how I did mine.





Bit more about it here: Grand Willys project

I was even thinking about notching the head as well as that would make the notch completely round and the same size as the pipe it normally has. I also wondered about drilling through to the egr runner from the inside of the port could work instead?


You can see the egr port right next to the No1 exhaust port there.
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Old 04-15-2014, 09:24 PM
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Re: srt8 exhaust comversiona GC overland

Hey man thanks again i actually went to 2 shops today and one is going to do it tomorow wile im at work so there kind of wont be any install pics 😏.
And had another question. If i ceramic coat the exhaust part that goes close to the trans. Woyld it help it or would it be the same???

Im planing on using the ceramic coating that they sale at oreilly auto parts its a spray
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Old 04-15-2014, 09:28 PM
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Re: srt8 exhaust comversiona GC overland

Quote:
Originally Posted by Gojeep View Post
Here is how I did mine.





Bit more about it here: Grand Willys project

I was even thinking about notching the head as well as that would make the notch completely round and the same size as the pipe it normally has. I also wondered about drilling through to the egr runner from the inside of the port could work instead?


You can see the egr port right next to the No1 exhaust port there.

Im guessing u didnt have any issues with the mid pipes since u went with LT right?
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Old 04-16-2014, 02:53 PM
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Re: srt8 exhaust comversiona GC overland

Ok guys if some one can give me a quick answer would apreciate it.
I have the jeep in the shop duing the exhaust and the guy asks me if i would like for him to delete the muffler and put pipes or an x pipe and keep the resos. He says it would sound really nice. But i am not sure if i should do it. I dont want to lose torque or back preasure.
So if some one can give me a quick answer would apreciate it! Thanks
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Old 04-17-2014, 12:11 AM
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Re: srt8 exhaust comversiona GC overland

Keep the muffler.... A dual exhaust system of that size is almost too much pipe for a stock 5.7. It will be plenty loud enough and the back pressure will make it run a thousand times better. Plus, the resale value of a car with a muffler is much better than one that it really loud and obnoxious. I would say you will have more power and better gas mileage with a muffler compared to no muffler
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  #21  
Old 04-17-2014, 12:12 AM
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Re: srt8 exhaust comversiona GC overland

The muffler is the chamber where the exhaust gases equalize. No need for an x pipe
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  #22  
Old 04-17-2014, 12:13 AM
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Re: srt8 exhaust comversiona GC overland

That notch looks great. I thought I heard that ceramic coatings on catalytic converters will roast the internals and cause damage. On a normal jeep grand cherokee there is ample space between that cat and the tran pan..... I would be wary of roasting the transmission in such a hot climate. But, once you get it up in the shop you will see what your dealing with. Good luck
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Old 04-17-2014, 12:41 AM
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Re: srt8 exhaust comversiona GC overland

Allright man thanks for the info. I told the shop i wanted to hear it all stock before i tried anything. I want to see how it runs also so if i do the change in the future i can know if it changed anything or not.

But wont have it done till tomorow and also waiting on my 2" RC lift to put that on also

So danny should i take that paint off the cats or leave it. I did it since they said that it was going to be to close to the trans and that it would be to hot. So i kind of wanted to make it a little cooler
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Old 04-17-2014, 12:42 AM
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Re: srt8 exhaust comversiona GC overland

Also the shop told me to buy the exhaust wrap because these dont have the heat shield and the wires to the starter were going to be to exposed. Is that true?
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