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.
