I just happen to come across this on the Mina Gallery site. Seems like a new product.

Jaguar XJR (X350) Performance Air Intake Tube Kit. - Mina Gallery Inc

It does not say if it fits a 2008 XJR but looks like it does. They also have a muffler delete kit. I'm sure the delete kit would work if you had the resonators in place. Not my case since I removed them and installed an X-pipe.

As soon as find out if it fits my XJR I will order the intake tube.

 

I made my own based upon someone else's information in this forum and am pleased with the results.

Seat of pants feeling is that I get more/quicker response to throttle opening.

Also not particularly more noise from supercharger. All for around $45 and a little effort.

 

Can you tell us which parts and where did you get them from? Thanks

 

https://www.jaguarforums.com/forum/x...-%2430-165898/

This is the thread.

The pic is of the Norma Connector I modified to connect the low load breather pipe which I already modified to take an oil catch can.
I cut off the ring clip of the NC and shortened the tubing of the NC but left two rubber seal rings which made a tight seal with the correctly sized hole I drilled in the aluminum tubing.

 

Even better results when you go to 80mm tubing ( the size of the standard maf tube on the air box) ;-)

 

The outside diameter of the aluminum tubing I used is 75mm.
I could not get it to fit inside the MAF tube connecting the air filter housing. Jth3rd did manage this however no way could I even force fit the aluminum tubing into the MAF tube. So I guess my tubing diameter is slightly larger than the tubing Jth3rd used.

I also still have the original intake intact in case I need to go back to original set up.

So had to use a straight "plastic" hose connector.

I actually made the other end of the aluminum tubing oval to match the oval of the original cast aluminum intake. However the cast intake is larger so I needed a 3" to 3.5" "plastic" connector.

 

That's where you have now introduced a restriction, if you use 80mm tubing you can use 2 x straight pieces of 80mm silicone as joiners that way it will fit over the plastic section of the air box have no reduction in surface area then the joiner going to the cast section will also fit over and at the same time adapt to the oval shape ( very difficult to reshape 80mm stainless steel).

 

+1
Substantial 13% surface decrease that will restrict air flow.
Also the Caldoofy intake tube is ss (instead of alu), which is thermally beneficial (specific mass and thermal conductivity) to avoid overheating intake air during thermal transients

 

i had instructions from a forum member as well . as I'm too far away for purchasing one to be economical . i found though that spinning up a boss for the breather was easiest . BTW alloy is fine i have no IAT issues .

 

I have fitted the silicon joiners over the plastic airbox connection NOT into it.
Same at the the other end.

Also shielded the whole tube with a thermal insulator.

Since I had already cut my original low load breather tubing to fit an oil catch can I was able to use the modified norma connector to press fit
into the aluminum tubing with simply a drilled hole.
The oil catch can is taking out quite a bit of oil btw much to my surprise as compared to the high load side.

The diameter of my MAF air box outlet connection is less than 75 mm which is why I could not force fit the aluminum tubing into it.

Also the throttle body diameter is 77 mm so a larger diameter tube would be 5.5 % "better" at 77 mm to match the throttle body but still restricted
at the MAF outlet under 75 mm. Which could be replaced I know.

Even boring out the throttle body would still leave the restriction at the elbow under the throttle body would it not?

In the thread "Quest for 450 hp" there is quite a bit of info on the exhaust side of the equation and it seems to me that increasing the flow on the intake side without improving exhaust flow limits the overall potential gain.
So I am considering "sports cats" from Paramount who have quoted me 1075 pounds plus delivery which is the killer but might be worth it
considering the exchange rate right now.

 

The hardest of this job is waiting for it for weeks to be delivered from China!

 

+1!!!

I have decided to go ahead with other mods and if I am not disappointed with the results will work on adding the 13%
flow reduction.

 

I think we are splitting hairs at this point...I don't mind losing 13% surface decrease to gain 80% surface increase in my wallet!

 

You have a valid point indeed.

 

If tuning the car for power gains should we not be aiming for the best gains possible or else why bother at all? I think if someone has the skills / time/ inclination to do their own modifications then fair play, I started with the 75mm intake and it was an improvement over the standard plastic intake no doubt about that, however when you increase the size you notice a further improvement (well documented particularly in the s type section). The problem when you try and increase the size is that 4 inch tubing won't fit under the bonnet and 80mm tubing is not an off the shelf product hence why I had to have it custom rolled which unfortunately comes at a cost. Factor in time to lathe a joiner to allow fitment of the standard oil breather connection as well as stainless quality jubilee clips plus quad reinforced silicone joiners and you find the costs for materials is far higher than you might expect.

I fully agree with doing things as economically as possible which is why I do the tubes effectively for beer money, if you take one down to a fabrication shop they will struggle to do it for the same cost.

I find it interesting that we are discussing saving a few pounds on the intake but in the same breath are discussing over 1000 pounds for sport cats which will net you the same gain as the larger tube! Incidentally you will net a significant financial saving if you buy generic 200 cell 2.5 inch bore cats and have an exhaust fab shop install them for you ( mine came in at £450 for the pair including installation ;-))

 

All the changes I have made so far I can "dial back" to original if need be.

That is my goal with the bolt on sports cats which I will install myself.

What I want to find out is IF these sports cats will enable my modified SC to operate a bit more effectively on top of everything else. I am not doing dyno tests so its down to "feel" for me.

I may well go to a 80 mm prefab inlet later, and waste at most $45.

 

You will most definitely see an improvement with the sport cats after the intake ( which ever version you use) but before that consider improvements to the transmission of power to the ground, the standard 255 tyres are woefully under specced in my opinion the obvious upgrade being adding 285 tyres to the rear to bring it up to xkr spec, this upgrade alone made a huge positive difference to the way the car drove and handled!

After fitting the cats the next stage I would recommend is to reduce the exhaust restriction further with a twin 2.5 inch system with x pipe after that there aren't many places to go, tunes are obviously in development to optimise mods fitted, lsd would be another obvious improvement but again aside from the quaife torque biasing unit there isn't alot out there.

 

Lets face it these cars are very limited for performance upgrades...I'm going with the intake, 1.5 pulley, and drop in and call it a day...If Cambo comes up with a reasonably priced tune I would add that too...I will only throw so much money at a 12 year old non collectible car. I will pick another car that suits my performance goals in stock form next time, XKR, or similar and when I get bored with it I have lots of performance options readily available! The XJR is a pretty good performer out of the box anyways...

 

Will be interested what you think after you have completed those updates.

I will not be "racing" my car so there is a limit to how far I will go beyond what I am committed to. However if the ECU tune is a reasonable cost will seriously consider it.

On a side note I am replacing a leaking upper heater connection hose and its on back order!!!