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Ok lets do it,
Manuelga asked for it and Terranismo keeps talking about it so here it is:
I finally completed my Header mod two weeks ago.
Since our engine QR25DE is the same as the famous "Sentra Spec V" which has all sorts of goody aftermarket bolt on accessories, good performance parts are easy to obtain.
The compatibility of the parts was kindly confirmed by Terranismo who was my source for this information and who also has LOTS and LOTS of mods.
The bolt on was quite easy. My only problem was the stripped threads on my front oxygen sensor and as you probably read in previous posts, a replacement part was sourced out of Mexico by our good buddy Manuelga (thumbs up!) since Dealer couldn't help me.
To get to the stock header you first have to remove some heat shields, remove the O2 sensor(s), remove the passenger side wheel, loosen the belt drive, move away the alternator and finally remove the stock header.
In reverse order reinstall performance aftermarket header.
I went with the header manufactured by HotShot.
This mod was explained in detail in NPM a few years back when the Spec V came out.
Here is the link with detailed description of the install on the Spec V:
http://www.nissanperformancemag.com/may02/specvmay02.php
As you will see the engine showed gains of approx 12 HP at the wheels.
The stock header also contains a pre-catalytic converter which the performance header does not have.
On the Canadian X-trail there are two O2 sensors: one before the pre-cat and one after. Since the performance header does not have a cat you have to relocate your second O2 sensor, luckily the car has a second catalytic converter under the car, you should extend the wires of the sensor and relocate after the second cat, (If this is not done, you will get a check engine light).
My impressions:
You definitely feel much better power from the engine.
Noise from the engine is slightly different, but barely louder.
There is a slight 'tingy' noise around 4000 rpm.
What I really like:
When I had done this mod on my Spec V, there was some very slight popping noise (backfire) when shifting or letting off the gaz pedal. Amazingly the X-trail has none of this whatsoever.
here are some pics of my installation:
finished install:
![]()
O2 sensor install:
![]()
Old and New sensor (sent by Manuelga):
![]()
Relocation of second O2 sensor after the second Catalytic converter under car:
![]()
Since this is install I have also added a cold air intake system and a lighter aluminum drive shaft pulley, but since I have no pics yet I will keep these mods for another day...
Happy X-Trailing Easter egg hunt to all!
ValBoo.
Manuelga asked for it and Terranismo keeps talking about it so here it is:
I finally completed my Header mod two weeks ago.
Since our engine QR25DE is the same as the famous "Sentra Spec V" which has all sorts of goody aftermarket bolt on accessories, good performance parts are easy to obtain.
The compatibility of the parts was kindly confirmed by Terranismo who was my source for this information and who also has LOTS and LOTS of mods.
The bolt on was quite easy. My only problem was the stripped threads on my front oxygen sensor and as you probably read in previous posts, a replacement part was sourced out of Mexico by our good buddy Manuelga (thumbs up!) since Dealer couldn't help me.
To get to the stock header you first have to remove some heat shields, remove the O2 sensor(s), remove the passenger side wheel, loosen the belt drive, move away the alternator and finally remove the stock header.
In reverse order reinstall performance aftermarket header.
I went with the header manufactured by HotShot.
This mod was explained in detail in NPM a few years back when the Spec V came out.
Here is the link with detailed description of the install on the Spec V:
http://www.nissanperformancemag.com/may02/specvmay02.php
As you will see the engine showed gains of approx 12 HP at the wheels.
The stock header also contains a pre-catalytic converter which the performance header does not have.
On the Canadian X-trail there are two O2 sensors: one before the pre-cat and one after. Since the performance header does not have a cat you have to relocate your second O2 sensor, luckily the car has a second catalytic converter under the car, you should extend the wires of the sensor and relocate after the second cat, (If this is not done, you will get a check engine light).
My impressions:
You definitely feel much better power from the engine.
Noise from the engine is slightly different, but barely louder.
There is a slight 'tingy' noise around 4000 rpm.
What I really like:
When I had done this mod on my Spec V, there was some very slight popping noise (backfire) when shifting or letting off the gaz pedal. Amazingly the X-trail has none of this whatsoever.
here are some pics of my installation:
finished install:
O2 sensor install:
Old and New sensor (sent by Manuelga):
Relocation of second O2 sensor after the second Catalytic converter under car:
Since this is install I have also added a cold air intake system and a lighter aluminum drive shaft pulley, but since I have no pics yet I will keep these mods for another day...
Happy X-Trailing Easter egg hunt to all!
ValBoo.
Everybody with an XTy could always use 12 extra HP, well maybe not so much the owners of the XT-GT in Japan 
