The 1998 XJR 4.0 to 4.2 engine swap thread !!!:)
#82
#84
![Default](/forum/images/icons/icon1.gif)
ok. So I got the motor in.....yeaayyy.....but now it looks like I have to take it right out.
I thought I can use the '04 XJR headers and I guess I'm 50% correct as the passenger side seems to fit, but the drivers side is very close to the steering shaft boot. I'm not sure how close I can go there without rubbing.
I'm thinking about using the passenger side since I have a flange for it and using the old '98 XJR header on the drivers side. What do you guys think? Anyone makes 4 screw flanges so I can make my own downpipes?
![](https://a6.sphotos.ak.fbcdn.net/hphotos-ak-ash4/310824_10150349185213988_818348987_8011261_1781493390_n.jpg)
![](https://hphotos-iad1.fbcdn.net/hphotos-ash4/314874_10150349187053988_818348987_8011271_1877207205_n.jpg)
![](https://a8.sphotos.ak.fbcdn.net/hphotos-ak-snc7/307143_10150349190393988_818348987_8011288_706178397_n.jpg)
![](https://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc7/317231_10150349191148988_818348987_8011289_1482386858_n.jpg)
I thought I can use the '04 XJR headers and I guess I'm 50% correct as the passenger side seems to fit, but the drivers side is very close to the steering shaft boot. I'm not sure how close I can go there without rubbing.
I'm thinking about using the passenger side since I have a flange for it and using the old '98 XJR header on the drivers side. What do you guys think? Anyone makes 4 screw flanges so I can make my own downpipes?
![](https://a6.sphotos.ak.fbcdn.net/hphotos-ak-ash4/310824_10150349185213988_818348987_8011261_1781493390_n.jpg)
![](https://hphotos-iad1.fbcdn.net/hphotos-ash4/314874_10150349187053988_818348987_8011271_1877207205_n.jpg)
![](https://a8.sphotos.ak.fbcdn.net/hphotos-ak-snc7/307143_10150349190393988_818348987_8011288_706178397_n.jpg)
![](https://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc7/317231_10150349191148988_818348987_8011289_1482386858_n.jpg)
![](https://a4.sphotos.ak.fbcdn.net/hphotos-ak-snc7/316824_10150349195683988_818348987_8011310_189019185_n.jpg)
#85
#86
#87
![Default](/forum/images/icons/icon1.gif)
The later x308 lower steering columns looks like this, it doesn't have a boot, and it's a lot slimmer, a much better design that was needed as the old one had failures, and was from the 90's XJ40...I wonder if fitting one would give clearance of the later manifolds?
![Name: MNE9500AD.jpg
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So you're deleting the cats? how are you going about fooling the ecu? cat cheaters? There's a company on here that can make you what you need, Nameless Performance I think they're called.....
![Name: MNE9500AD.jpg
Views: 194
Size: 3.9 KB](https://www.jaguarforums.com/forum/attachments/xj-xj8-xjr-x308-27/169161d1501281791-1998-xjr-4-0-4-2-engine-swap-thread-mne9500ad.jpg)
So you're deleting the cats? how are you going about fooling the ecu? cat cheaters? There's a company on here that can make you what you need, Nameless Performance I think they're called.....
#89
![Default](/forum/images/icons/icon1.gif)
The later x308 lower steering columns looks like this, it doesn't have a boot, and it's a lot slimmer, a much better design that was needed as the old one had failures, and was from the 90's XJ40...I wonder if fitting one would give clearance of the later manifolds?
![](http://i916.photobucket.com/albums/ad7/jaguarsmate/MNE9500AD.jpg)
So you're deleting the cats? how are you going about fooling the ecu? cat cheaters? There's a company on here that can make you what you need, Nameless Performance I think they're called.....
![](http://i916.photobucket.com/albums/ad7/jaguarsmate/MNE9500AD.jpg)
So you're deleting the cats? how are you going about fooling the ecu? cat cheaters? There's a company on here that can make you what you need, Nameless Performance I think they're called.....
A far as the ECU, I'm hoping that this should do the trick:
http://cgi.ebay.com/ebaymotors/Dorman-42009-SPARK-PLUG-NON-FOULERS-/330619505232?pt=Motors_Car_Truck_Parts_Accessories &hash=item4cfa754a50
Last edited by adam699; 10-10-2011 at 10:35 PM.
#91
![Default](/forum/images/icons/icon1.gif)
A far as the ECU, I'm hoping that this should do the trick:
http://cgi.ebay.com/ebaymotors/Dorman-42009-SPARK-PLUG-NON-FOULERS-/330619505232?pt=Motors_Car_Truck_Parts_Accessories &hash=item4cfa754a50
Excuse my ignorance but can you tell me how this will work?
#92
#93
![Default](/forum/images/icons/icon1.gif)
![](https://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash4/305115_10150355949388988_818348987_8043952_8339419_n.jpg)
Almost done with the exhaust part...
![](https://a1.sphotos.ak.fbcdn.net/hphotos-ak-ash4/300708_10150355949523988_818348987_8043953_1771819573_n.jpg)
![](https://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc7/298024_10150355949803988_818348987_8043955_930644090_n.jpg)
![](https://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc7/300143_10150355949948988_818348987_8043957_877616214_n.jpg)
What's the biggest exhaust anyone put on these cars? I see that the Borla is 2.25". I'm starting to think I might be overdoing it with the 2.5" down pipes. I'm definitely going to have to upgrade things out back. Otherwise the transition from 2.5 to 2.125 looks funny.
Last edited by adam699; 10-15-2011 at 02:21 AM.
#94
#95
#96
The following users liked this post:
adam699 (10-15-2011)
#97
![Default](/forum/images/icons/icon1.gif)
yeah I have 2.5 from cat all the way out over the axle out magnaflow sounds great and added a bit i think maybe just the sound makes it feel faster LOL, Cant wait till my buddy gets done with the new step manifolds and downpipes. Gave up on the headers too restrictive to get them fit right and flow well
#98
#99
![Default](/forum/images/icons/icon1.gif)
After messing with the 04 headers I concluded that the long tubes would be impossible to fit without some major mods. A bigger diameter log header might work.
yeah I have 2.5 from cat all the way out over the axle out magnaflow sounds great and added a bit i think maybe just the sound makes it feel faster LOL, Cant wait till my buddy gets done with the new step manifolds and downpipes. Gave up on the headers too restrictive to get them fit right and flow well