Long tube headers? Seeking 4.2 X150 in Phoenix AZ
#1
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Searching for someone in the Phoenix AZ area who would be either interested in long tube headers or be willing to lend their car to Ardent Performance for about a week. They've made a set for the 5 litre XFR and XKR https://ardent-performance.com/colle...exhaust-header but I'm after a set for the 4.2. If there's a member here willing and interested, send me a message. Many thanks.
#3
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I remember speaking to Stuart a while back about this, he had headers for the f type 5l s/c and said the gains just didn't warrant the price .
Im just unsure how much more can be gained with the s/c 4.2 I know the n/a 4.2 would definitely get a good power jump .
by memory I think supersprint have a set for the 4.2 it's under the range rover banner on their site.
also by having this engine out I got to see first hand how tight it really is if u do intend to have a set made up I would heavily suggest the header being 2 piece to make installation just a little bit easier
Im just unsure how much more can be gained with the s/c 4.2 I know the n/a 4.2 would definitely get a good power jump .
by memory I think supersprint have a set for the 4.2 it's under the range rover banner on their site.
also by having this engine out I got to see first hand how tight it really is if u do intend to have a set made up I would heavily suggest the header being 2 piece to make installation just a little bit easier
Last edited by steve_k_xk; 10-28-2021 at 05:51 PM.
#4
#5
#6
![Default](/forum/images/icons/icon1.gif)
I remember speaking to Stuart a while back about this, he had headers for the f type 5l s/c and said the gains just didn't warrant the price .
Im just unsure how much more can be gained with the s/c 4.2 I know the n/a 4.2 would definitely get a good power jump .
by memory I think supersprint have a set for the 4.2 it's under the range rover banner on their site.
also by having this engine out I got to see first hand how tight it really is if u do intend to have a set made up I would heavily suggest the header being 2 piece to make installation just a little bit easier
Im just unsure how much more can be gained with the s/c 4.2 I know the n/a 4.2 would definitely get a good power jump .
by memory I think supersprint have a set for the 4.2 it's under the range rover banner on their site.
also by having this engine out I got to see first hand how tight it really is if u do intend to have a set made up I would heavily suggest the header being 2 piece to make installation just a little bit easier
Swallows Racing offer short tubes for the 4.2, but only RHD and so far they've been reluctant to attempt an LHD.
#7
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#8
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What? I was thinking he was ignoring me wow !.
Anyone know what happened?
Anyone know what happened?
__________________
2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 111.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 Supercharged, (stock with Alpha Jag ECU tune), estimated power: 600+ hp, 7.7sec 1.8th mi/95mph
![](https://www.jaguarforums.com/forum/signaturepics/sigpic171814_2.gif)
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 111.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 Supercharged, (stock with Alpha Jag ECU tune), estimated power: 600+ hp, 7.7sec 1.8th mi/95mph
#9
![Default](/forum/images/icons/icon1.gif)
Searching for someone in the Phoenix AZ area who would be either interested in long tube headers or be willing to lend their car to Ardent Performance for about a week. They've made a set for the 5 litre XFR and XKR https://ardent-performance.com/colle...exhaust-header but I'm after a set for the 4.2. If there's a member here willing and interested, send me a message. Many thanks.
__________________
2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 111.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 Supercharged, (stock with Alpha Jag ECU tune), estimated power: 600+ hp, 7.7sec 1.8th mi/95mph
![](https://www.jaguarforums.com/forum/signaturepics/sigpic171814_2.gif)
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 111.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 Supercharged, (stock with Alpha Jag ECU tune), estimated power: 600+ hp, 7.7sec 1.8th mi/95mph
#10
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