Drivetrain Jackson Header Installed
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6th Gear
Joined: Jul 2002
Posts: 3,446
Likes: 9
From: L.A ca
I had the new header from jackson installed today. Took the tech about 90 min and the hardest part was taking the old one piece system off . It comes out thru the bottom FYI. The new 3 piece went in really well. If you go to the link provided i put up several pictures of the pieces both old and new. To be honest after looking closely at the bottleneck created in the middle of the stock header I don't know how the car ran as well as it did before. I managed to put about 100 miles on it today running down more parts ( the Borla race system goes on tomorrow ) and felt that the most noticeable difference other than the improved exhaust note was getting to the red line noticeably quicker. It does get thru the gears faster and i feel more of a " hit " from mid range on. More review to follow , Randy
Page Title maxmini mods and upgrades page
Page Title maxmini mods and upgrades page
4th Gear
Joined: Mar 2003
Posts: 540
Likes: 1
From: Calabasas, Los Angeles
Nice!!! I am looking forward to an aftermarket header in the future. It sounds like a good difference and also, there is no cat as well now, correct? Maybe I'll see you at flames this friday. 
OVERDRIVE - Racing Champion
Joined: Feb 2003
Posts: 15,262
Likes: 72
From: Mililani, Hawaii
Maxmini-
Thanks for the picts.
As one can see the stock header isn't more than a minimal header.
What you can't see until you get up really close-
As each primary leads up to the 2.75" collector, all four 1.25" pipes merge into one and there is a severe bottle neck down to a fraction of each pipe as they each take up one quarter of the one collector.
Note the pre-cat after the first O2 sensor- a restriction point that is removed from all aftermarket headers
Between the braided coil joint and the Pre-cat note the very severely constricted and crimped pipe that narrows down to it's worst point- it's got a reinforcing rib along the tube but the diameter is about 1.75" at the smallest.
The cat construction is basic (the Milltek I have has a really nicely done sport cat by comparison)
I'd like to know how loud it is with the stock exhaust inside the MINI and outside. When does the midrange power start? At what rpm. What happens when you add the borla race exhaust.
I have a Quicksilver that was pretty quiet until I added the header then now it is loud even with the sport cat.
Another potential problem is are all of the O2 sensors working OK and are any dash lights are coming on?
Looking forward to day 2 of your install.
Thanks for the picts.
As one can see the stock header isn't more than a minimal header.
What you can't see until you get up really close-
As each primary leads up to the 2.75" collector, all four 1.25" pipes merge into one and there is a severe bottle neck down to a fraction of each pipe as they each take up one quarter of the one collector.
Note the pre-cat after the first O2 sensor- a restriction point that is removed from all aftermarket headers
Between the braided coil joint and the Pre-cat note the very severely constricted and crimped pipe that narrows down to it's worst point- it's got a reinforcing rib along the tube but the diameter is about 1.75" at the smallest.
The cat construction is basic (the Milltek I have has a really nicely done sport cat by comparison)
I'd like to know how loud it is with the stock exhaust inside the MINI and outside. When does the midrange power start? At what rpm. What happens when you add the borla race exhaust.
I have a Quicksilver that was pretty quiet until I added the header then now it is loud even with the sport cat.
Another potential problem is are all of the O2 sensors working OK and are any dash lights are coming on?
Looking forward to day 2 of your install.
I was looking into the possibility of going with this unit. I recieved this email from Keith at Jackson racing
"The header is not cataloged as a 'street' part....it is rightfully shown as a 'race only' part.
1) Now that that's been said, this header replaces the catalytic converter and it's length
does take up that space originally occupied by the cat and bolts up to the remaining
exhaust.
2) The probability of the 'check engine' light coming on is high. We have had this header
on our Moss Mini for a while now and the light has yet to come on. Don't really know
why not .... it should have happened by now.
3) Exhaust sound is different, not only because of the longer primary tube length & size
of the header but also because the cat conv is now gone. That alone makes quite a
big difference in the overall sound emission.
4) Providing the header is installed with the proper torque and assembly procedure, the
issue of gasket blowout will not exist.
Thank you. K T
-----Original Message-----
From: Joseph Collette III
Posted At: Saturday, October 25, 2003 10:54 AM
Posted To: Tech Support
Conversation: 100-375 Rackson Racing header
Subject: 100-375 Rackson Racing header
Just a couple of questions about the above part number.
1. Is this header the same length as the stock header, so that it will mate with the exhaust system in the same location?
2. Since this header does not have a cat, does it set off the check engine light?
3. How loud is this product? Would it be too loud on a daily driver?
4. Gasket blowout. Will this be a problem with so many flanges?
I appreciate your information. Thanks.
Joseph Collette"
I'm not too sure now... could weld a cat and flange to the end of the system. It sure is pretty, but for street use, I think I may go millitech.
"The header is not cataloged as a 'street' part....it is rightfully shown as a 'race only' part.
1) Now that that's been said, this header replaces the catalytic converter and it's length
does take up that space originally occupied by the cat and bolts up to the remaining
exhaust.
2) The probability of the 'check engine' light coming on is high. We have had this header
on our Moss Mini for a while now and the light has yet to come on. Don't really know
why not .... it should have happened by now.
3) Exhaust sound is different, not only because of the longer primary tube length & size
of the header but also because the cat conv is now gone. That alone makes quite a
big difference in the overall sound emission.
4) Providing the header is installed with the proper torque and assembly procedure, the
issue of gasket blowout will not exist.
Thank you. K T
-----Original Message-----
From: Joseph Collette III
Posted At: Saturday, October 25, 2003 10:54 AM
Posted To: Tech Support
Conversation: 100-375 Rackson Racing header
Subject: 100-375 Rackson Racing header
Just a couple of questions about the above part number.
1. Is this header the same length as the stock header, so that it will mate with the exhaust system in the same location?
2. Since this header does not have a cat, does it set off the check engine light?
3. How loud is this product? Would it be too loud on a daily driver?
4. Gasket blowout. Will this be a problem with so many flanges?
I appreciate your information. Thanks.
Joseph Collette"
I'm not too sure now... could weld a cat and flange to the end of the system. It sure is pretty, but for street use, I think I may go millitech.
OVERDRIVE - Racing Champion
Joined: Feb 2003
Posts: 15,262
Likes: 72
From: Mililani, Hawaii
>>I was looking into the possibility of going with this unit. I recieved this email from Keith at Jackson racing
Thanks for including the questions and the reply.
>>"The header is not cataloged as a 'street' part....it is rightfully shown as a 'race only' part.
In order for it to be street legal it needs the Sport Cat or some sort of Catalytic converter but that would restrict some exhaust flow, rob some power, reduce some of the exhaust noise,& add some weight and cost to the header.
>>1) Now that that's been said, this header replaces the catalytic converter and it's length
>> does take up that space originally occupied by the cat and bolts up to the remaining
>> exhaust.
One option is to custom build a piece that can replace the third segment of this header that is the right length but contains a cat and a place for the second O2 sensor. But this is costly and the results would be unpredictable.
>>2) The probability of the 'check engine' light coming on is high. We have had this header
>> on our Moss Mini for a while now and the light has yet to come on. Don't really know
>> why not .... it should have happened by now.
This is a known problem with all headers that lack a cat or sport cat. I have the Milltek which is the same and the London Stainless and the O2 sensors all work fine and I have had no trouble whatsoever.
>>3) Exhaust sound is different, not only because of the longer primary tube length & size
>> of the header but also because the cat conv is now gone. That alone makes quite a
>> big difference in the overall sound emission.
Some people say that the exhaust note is a little louder and some say moderately louder. It all depends on which exhaust you are using. With something like the stock exhaust I think the increase in loudness is small but definite. I have the quicksilver and with the header it is loud both inside the car and outside but only with throttle up and with certain rpms. In idle and at highway cruising of about 60-65 mph it is quiet.
With no cat converter the header and exhaust should be loud to very loud in wide open throttle. You can hear it clearly on all four corners of a city block.
If I had the stock radio in my car you would have trouble hearing it while driving on city streets with the windows rolled up. Fortunately I have an aftermarket killer stereo that completely drowns out my exhaust when I want it to.
I would advise owners to be careful before buying headers. They are a big investment and although there are some power gains there may be decreased mpg, lots of noise, and problems with the O2 sensor lights and with being street legal.
>>4) Providing the header is installed with the proper torque and assembly procedure, the
>> issue of gasket blowout will not exist.
Gasket blowout not a problem with my milltek header.
Thanks for including the questions and the reply.
>>"The header is not cataloged as a 'street' part....it is rightfully shown as a 'race only' part.
In order for it to be street legal it needs the Sport Cat or some sort of Catalytic converter but that would restrict some exhaust flow, rob some power, reduce some of the exhaust noise,& add some weight and cost to the header.
>>1) Now that that's been said, this header replaces the catalytic converter and it's length
>> does take up that space originally occupied by the cat and bolts up to the remaining
>> exhaust.
One option is to custom build a piece that can replace the third segment of this header that is the right length but contains a cat and a place for the second O2 sensor. But this is costly and the results would be unpredictable.
>>2) The probability of the 'check engine' light coming on is high. We have had this header
>> on our Moss Mini for a while now and the light has yet to come on. Don't really know
>> why not .... it should have happened by now.
This is a known problem with all headers that lack a cat or sport cat. I have the Milltek which is the same and the London Stainless and the O2 sensors all work fine and I have had no trouble whatsoever.
>>3) Exhaust sound is different, not only because of the longer primary tube length & size
>> of the header but also because the cat conv is now gone. That alone makes quite a
>> big difference in the overall sound emission.
Some people say that the exhaust note is a little louder and some say moderately louder. It all depends on which exhaust you are using. With something like the stock exhaust I think the increase in loudness is small but definite. I have the quicksilver and with the header it is loud both inside the car and outside but only with throttle up and with certain rpms. In idle and at highway cruising of about 60-65 mph it is quiet.
With no cat converter the header and exhaust should be loud to very loud in wide open throttle. You can hear it clearly on all four corners of a city block.
If I had the stock radio in my car you would have trouble hearing it while driving on city streets with the windows rolled up. Fortunately I have an aftermarket killer stereo that completely drowns out my exhaust when I want it to.
I would advise owners to be careful before buying headers. They are a big investment and although there are some power gains there may be decreased mpg, lots of noise, and problems with the O2 sensor lights and with being street legal.
>>4) Providing the header is installed with the proper torque and assembly procedure, the
>> issue of gasket blowout will not exist.
Gasket blowout not a problem with my milltek header.
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