Topic: Performance Stainless catback for $160

[andpgud]

Would the same exhaust be good on a 2.5 TJ?
What are the gains. I am thinking about doing the same.
I was also thinking that maybe since I am in Poland, I dont have to go with magnaflow, just buy some can and performance cat. What do the specs have to be?

[sharpxmen]

Would the same exhaust be good on a 2.5 TJ?
What are the gains. I am thinking about doing the same.
I was also thinking that maybe since I am in Poland, I dont have to go with magnaflow, just buy some can and performance cat. What do the specs have to be?

just go with the Banks TJ tailpipe in that case (if you can get it there, i had a choice between TJ and LJ and went with the latter for the extra length and 1 additional 45 deg bend which turned out to be the right call for me), if not you could go with some a pre-bent pipes and do what i did by cutting and fitting to route the tailpipe - 2.5'' is better than 2.25'' (stock) of course.

from memory this is what the routing was by angles starting from the ehxaust tip under the bumper and moving towards the muffler
 1. straight pipe between the frame rail and the gas tank
 2. 45 deg upwards towards the gastank crossmember (didn't modify this, just like it was)
 3. i cut the straight portion right before the crossmember and used a 1/2 of one of the 45 deg bends to route it almost vertical close to the clearing in the crossmember (in my case to clear the trackbar frame mount)
 4. used a aproximately a 90 deg bend cut off the 135 deg bent that was there before to get the pipe horizontally.
 5. used another 45 deg to go down towards the muffler
 6. used another 45 to get into the muffler outlet

of course i had to fiddle with the angles a bit, they won't be exactly those degrees but you always do that when you make a custom exhaust, but those are about the right bends you'd need to get one going for the YJ, for TJ i don't know exactly but should be close enough.

I don't have the lengths but a summary of what you might need would be:
 - straight pipe (enough with some leftover to cover your straight portions)
 - 3 x 90 deg (two of them cut in 1/2 for 4 x 45 deg bends or whatever you'd need to route all that, you could go with 2 x 90 deg and 2 x 45 deg but with the 90 would let you get the angle where you want it easier, like if you need 50 for example)

you might want to get an extra 90 deg to have a spare, i almost needed another bend but managed to save it, would have been nice to have the extra one would have made my routing to the muffler a bit easier (if you look at the pics i had to use a 3'' short piece right before that to get the routing right and cheat a bit on the angle).

hope this helps.

[andpgud]

Bedning is not a problem. Friend of mine has a mendrel bender

[sharpxmen]

It would be nice if you could add a picture of the whole thing along with headers.

I don't have a pic with the headers but here's one with the downpipe to cat




got the hangers bent and welded - i used a Mustang hanger kit for both muffler outlet and rear hangers, worked out well












this is how i solved the Downpipe hanger, i used the clamp that came with the Banks tailpipe and bent the heck out of the old center hanger to be able to use it on the cat inlet, i can reuse this in the future so that works well, I want to bent it a bit more to get it another 1/2'' forward but works the way it is




as it sits right now it's all held by the hangers and it doesn't touch anywhere even if i shake it good.

Still need to weld the tip on but i am waiting for another tip i ordered to decide which one to use.

[andpgud]

From what I see, do you have your headers wrapped?

[sharpxmen]

From what I see, do you have your headers wrapped?

yes

[neale_rs]

It looks great!   You might consider a stock type rearmost hanger.  I currently have one like the one you have now and when used on rocks, it tends to get bent due to the limited upward movement it allows.  The stock hanger allows a lot more upward movement and helps save both the tube tip and the hanger.

[sharpxmen]

It looks great!   You might consider a stock type rearmost hanger.  I currently have one like the one you have now and when used on rocks, it tends to get bent due to the limited upward movement it allows.  The stock hanger allows a lot more upward movement and helps save both the tube tip and the hanger.

i tried to find a stock hanger but i failed, i'm not even sure how it supposed to look like

the exhaust tip is above the like of the tank and shackle so i hope that will keep it protected, nonetheless would be better with a bit more flexibility although the one i have on there now keeps the tailpipe from hitting the tank, shackle or frame which is good considering that the 2.5'' is a tighter fit.

[neale_rs]

The stock one is similar to the ones used near the muffler, only that the rubber piece is not as wide.  A hook is attached to the frame with a couple of bolts, then there is a rubber piece, and then a hook welded to the exhaust pipe.  They are probably pretty hard to find but maybe something similar could be used. 

[sharpxmen]

The stock one is similar to the ones used near the muffler, only that the rubber piece is not as wide.  A hook is attached to the frame with a couple of bolts, then there is a rubber piece, and then a hook welded to the exhaust pipe.  They are probably pretty hard to find but maybe something similar could be used. 

i could probably find/fab something similar to that but i kind of like the way this one is as it keeps the tailpipe from banging in the tank or shackle, i'll try it this way and if it fails i'll figure out something better.

[Jeffy]

Looks like this.  There's another piece that holds the bushing and slips into the groove.  The other side is bolted down, trapping the bushing.

[sharpxmen]

Looks like this.  There's another piece that holds the bushing and slips into the groove.  The other side is bolted down, trapping the bushing.

i see, then is not that much different than what i have other than it is located lower (the rubber bushing)

[Jeffy]

i see, then is not that much different than what i have other than it is located lower (the rubber bushing)

I wouldn't bother changing it.

[neale_rs]

Interesting, mine was different.  Just a hook shape offset a bit from the frame without any other pieces (other than the rubber hanger).

[sharpxmen]

From what I see, do you have your headers wrapped?

found a pic of the exhaust header before it was installed