looking for some headers for my 2000 xj 4.0l seeing as theres not much that ive found only ones ive seen are the ones from flow daddy http://www.rustysoffroad.com/flow-da...l-headers.html
and the ones from banks
http://www.quadratec.com/products/17601_500_07.htm
so mainly its price differnce pretty decent amount not really going for performance just want to replace the stocks ones since ill be down there to do the gasket or should i just stick with my stock ones till something goes?

 

Borla, but if its in good shape, don't touch it.

 

Here's the PC single chamber. Cold start!

 

Loud

 

You've gotta be kidding me Mudfrog! Lol A LOT quieter than straight piped I like it though, it doesn't drone horribly.

 

Ah.. didn't know you were coming from straight piping.. yea it should be quieter than straight piping. It's still much louder than my 4.0

 

Here's a warmed up idle

 

got a crappy exhaust put on since my dad couldnt handle it after my muffler took a dump and i cut the whole thing off from the tcase loved it but anyways i got one put back on and now at idle it sounds like a thump.. is this normal? Like the muffler kinda thumps.. weird.. is it normal?

 

I just got some new exhaust parts for Christmas from my parents. I got a Thunderbolt Spun Cat, a Flowmaster Super 44, and new tail pipe. All at 2.5". Will this all work with the stock header/manifold or do I need a new one with a bigger exit? I have never played with exhaust before, so I want to make sure I do it right. Thanks.

 

You'll be fine, though an APN header would be a great replacement if your manifold is cracked.

 

Quick question about this thunderbolt 2.5"' spun cat from performance curve: I'm buying the mandrel bent 2.5" pipe, a flowmaster 50 delta flow from them, and I was planning on this high flow cat, I have an 89' renix, does this cat have a bung hole for a o2 sensor? I don't want it if it does. I can't find anywhere on the site if it says so or not. I'm just looking for the cheapest high flow cat I can find, I am in commifornia, and it says its not legal for commifornia, but I don't give a ****. I have about 1.5 years left before I need to re-smog and I don't want to be here anyways when that comes around. Also, I plan on using just clamps and hangers from pep boys and kragen to install it, do they sell 2.25"-2.5" adapter pipe? I imagine the downpipe after the manifold is 2.25", I already have a new manifold aswell installed, btw.

Thanks for any information

 

Just get a magna flow high flow cat on amazon, cheap and has no hole. I run it on my 89

 

I would but those are waaaay more than I want to spend right now on a cat, cheapest one I saw was a 3" one for 50, but that won't work. Everything else is 70-100+

 

I bought mine on amazon for like $45-$50 bucks

 

I guess nobody is selling them anymore, closes thing that would fit is


not even high flow, and that's still a bit more than I would like to spend, might just have to leave the old junker one on there. The PO put a stupid 3" maybe even 3.5" pipe (guestimating, its huge) after the cat to a muffler with a turndown, and I have absolutely horrid gas mileage and drone with it, can't stand it anymore I only have around $200 to work with for everything, money is really tight, had to replace headlights, still need to do t-case rear seal, and I need a new radiator soon, new driver door, + locksmith costs