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Jeep Street and Performance Do you like to go fast in your Jeep?

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  #1  
Old March 13th, 2007, 17:56
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traitor5150 traitor5150 is offline
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Xj downpipe questions

OK I just orderd an APN header for my 4.6 stroker build. I was running a pacesetter before Junk... Now I have no downpipe I trashed the stock one a long time ago and I dont want to go with a facory crushed stocker. Who sells a downpipe for an XJ/MJ I see a Banks for a yj but the yj goes under the oil pan not behind it like the xj. Looking at a yj pipe it looks like it is possible to adapt but does anyone know as I would rather buy a xj pipe then buy a yj one and cut it up. Thanks
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  #2  
Old March 13th, 2007, 19:11
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Re: Xj downpipe questions

Have someone custom make it for you, I couldnt imagine it being over $100.
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  #3  
Old March 13th, 2007, 20:41
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Re: Xj downpipe questions

Quote:
Originally Posted by BBeach
Have someone custom make it for you, I couldnt imagine it being over $100.
x2
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  #4  
Old March 13th, 2007, 20:56
nekocopter nekocopter is offline
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Re: Xj downpipe questions

I bent my own for about $20, but I have access to a mandrel bender.

Any exhaust shop that's half-way decent should be able to make one for you.
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  #5  
Old March 22nd, 2007, 20:28
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Question Re: Xj downpipe questions

I am needing to get a header as my stock one is cracked, and I want a better one. If I get a new one should I replace the downpipe? Also, what size pipe do I need. I put a new high flow cat and the Dynomax Super Turbo system in. Basically, everything in front of the cat is stock (down pipe and header). Do I need to do anything as far as changing size when I get new header? I am not sure what size the collector goes to, and downpipe to the cat.

Thanks,
Silent
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  #6  
Old March 22nd, 2007, 20:40
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Re: Xj downpipe questions

The best headers come with their own downpipe. Save up for those, they are worth the extra cost.
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  #7  
Old March 22nd, 2007, 20:47
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Question Re: Xj downpipe questions

OK, which brands do?
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  #8  
Old March 22nd, 2007, 20:51
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Re: Xj downpipe questions

pacesetter.

clifford....best on the market $$$$$$$$$ tho
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  #9  
Old March 22nd, 2007, 21:02
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Re: Xj downpipe questions

Quote:
Originally Posted by tealcherokee
pacesetter.

clifford....best on the market $$$$$$$$$ tho

Borla header comes with a nice down pipe to the cat or alt least close to it.
seams like the last time i check on one it was like.... 5 or $600...........Hmmm they have come down in price!

http://www.borla.com/applications/lo..._System/14200/

flash.
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  #10  
Old March 23rd, 2007, 01:56
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Re: Xj downpipe questions

the apn header looks very similar to my banks... and costs about 2/3 less... i got a downpipe, 2.5 bent for 45 bucks + 15 welded in at my local exhaust place = 60 dollars
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  #11  
Old March 26th, 2007, 10:54
SICARIO SICARIO is offline
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Re: Xj downpipe questions

Here's a list of headers, most of them have downpipes.

http://www.quadratec.com/products/pr...kw=header&pg=1
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  #12  
Old March 26th, 2007, 14:39
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Re: Xj downpipe questions

Because its the same Borla one over and over again just in a combo kit or for a different year, then one pacesetter which Ive heard to stay away from due to paint chipping (not sure if it goes for Jeep exhaust manifolds too).
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  #13  
Old March 26th, 2007, 19:41
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Question Re: Xj downpipe questions

Ok, So I called Clifford Performance today to ask some questions about their exhaust headers. I asked the guy on the phone, what is the difference between your headers that have 2 pipes for the collector, and others that have 1 collector. He told me that it helps with mid range power, and that if I ran 2 pipes, 2 mufflers (basically a semi-dual exhaust). I proceded to tell him that I just replaced the cat, and muffler, and exhaust pipe. And I did not want to replace the current set-up with another 2 exhaust mufflers and so on. I asked him if there was a way that I could replace my headers and downpipe without going 2 setups. He said I could but I would only get about a 10% gain in power. He said with the dual setup I would get about a 30% gain in power. He also said the exhaust would heatup the muffler to something like 1300 deg. I was like whoa. HE said it should get to about 425 or something like deg. He also told me that the XJ's fuel injection was not good, and that it inherently had a condition that always runs rich. I said I am getting ready to replace the injectors. He told me that it would not correct the problem. He then told me that I should get this redline system that I could program it with a laptop. I am thinking I am not going to spend all this money for all that. Anyhow, what are you thoughts on what I was told? Lets hear it.

Thanks,
Silent
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  #14  
Old March 27th, 2007, 18:18
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Re: Xj downpipe questions

4.0 run rich is this guy on crack? i always hear thay run lean! does banks make a down pipe for a XJ? borla is sweet if you have the money
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  #15  
Old March 28th, 2007, 00:11
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Re: Xj downpipe questions

Quote:
Originally Posted by polar_jeep_04
4.0 run rich is this guy on crack? i always hear thay run lean! does banks make a down pipe for a XJ? borla is sweet if you have the money
My 95 ran way rich with stock injectors. I've heard that the renix motors run lean, but for the most part I think the HOs run really rich.

Kyung
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