Ok, as you know, I dont really like to do anything the easy way, or like anyone else....so i had a new exhaust concept.

I want to run a performance high flow cat with a 1 into 2 high flow muffler.
Yes, I know that sounds normal so far....heres where I get off of the path.

I want to go from the smaller exit pipes in the relocated muffler into 3in exit pipes. Now, I know this causes a problem with "backpressure" and "airflow", but wait....it gets crazier.

I have an extra set of high performance aftermarket pipes off of my 2007 Harley flhx. They are 3 in straight pipes with removable baffles, and have an amazing sound.

I want to put these baffles into the 3in exits on the JK and see what happens. Im thinking it would cut the flow back down to the proper restriction, and give me a cool throaty rumble.

Any knowledgable people wanna throw in their input?

 

im no professional but it sounds pretty badass to me

 

Not being an industry expert, your Harley engine is about 100 ci or about 1000 CC's, the jeep engine is 3800cc's so I would imagine the flow from your jeep would be much higher than that of your bike...I am thinking the baffles from your exhaust might be too restrictive? At this point it might just be easier to go full custom.

 

What's the internal diameter of those baffles?

The 3-3" pipes are going to be the killer. That will absolutely crush your exhaust velocity and is good for over 1,000 hp. With 3 exit pipes you are good only up to about 1.5"and that carries you well beyond what power the 3.8 can make. Could still be workable with the baffles and the 3" pipe, but a lot will depend on the internal diameter.

The way I would get it done is to keep the 2.5" pipe in place, use a header collector backwards with one of the tubes trimmed and welded out, then run 1.5" pipe to where the 3" exhaust tips with baffles are and fabricate something to attach them to the 1.5" pipe.

 

its 2 3" pipes, not 3.
i do plan on going out 1.5 from the muffler to the baffles which are 1.5 ID.
the 3" is for echo chamber surrounding the baffles.

 

OK, I know your always on the edge and 3 exits was kind of borderline losing it, so my bad and reading is fundamental.

Dual outs on our diminutive JK motors call for 1.75" diameter, and despite 2" pushing things it's nothing that's going to kill you.

 

When you get all this mounted and ready to drive. Let me know so I can drive in front of you. 'cause your gonna blow the front end of the guy behind you clean off. You'll have enough pressure in that exhaust to launch the space shuttle

 

Now i just need to find somebody who will do it.
The local guy says its stupid....so he wont mess with it.

 

They sell Harley Pipes at Home Depot?

 

When I win the lottery I want YOU to design my custom JK. It'l probably cost $100,000, but look like a million!