Exhaust X pipe and XK mod help
#21
09-15-2017, 08:07 AM
Veteran Member
The FrickenFast cats are $1,750, plus shipping. https://frickenfast.us/t/high-flow-race-catalyst How did you do the cats and x-pipe for under $1K? Whose cats did you use?
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Stuart S (09-15-2017)
#22
09-15-2017, 09:20 AM
Veteran Member
The FrickenFast cats are $1,750, plus shipping. https://frickenfast.us/t/high-flow-race-catalyst How did you do the cats and x-pipe for under $1K? Whose cats did you use?
Jahummer, I went with the Magnaflow 59975 spun metallic cat because one end come out at a 45` angle. Made fitment easier.
#23
09-15-2017, 09:40 AM
Veteran Member
I went back and forth on which version but was concerned the angle would be wrong and I'd have another bend to make so I went with the straight. Now you've confirmed it would work that may be easier.
#24
09-15-2017, 10:26 AM
Veteran Member
#26
09-15-2017, 11:47 AM
Veteran Member
No, you are wrong. Any replacement cat needs the CARB certification in Kaliforniastan which adds @ 30% to the cost. Check out Summit Racing. Magnaflow does have CARB cert cats. I don't think they have many generic performance ones though.
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ralphwg (09-15-2017)
#27
09-15-2017, 04:50 PM
Veteran Member
A pair of these https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1, 4 bungs, pair of flanges and some pipe and labour.
#28
09-15-2017, 05:13 PM
Veteran Member
If I had to venture a guess I'd say 200. They have a spun metallic core vs. ceramic like the old ones so they have larger openings between the honeycomb. The overall diameter is 4" which gives @ 3.75" with the cushion wrap between the core and the shell. The factory core has a much larger cross section but is double the length (two cores, pre cat and main cat). I went from the Magnaflows to an OEM '11 Mustang cat which is similar to the stock Jaguar one and lost about 1/2 the amplitude from the exhaust. Before on the interstate I could back off the throttle and cars 2-3 car lengths ahead of me would get out of the way thanks to the cackle. Very race car sounding but it was just too over the top.
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u102768 (09-16-2017)
#30
09-15-2017, 10:19 PM
#31
09-15-2017, 11:46 PM
Veteran Member
No one that I have researched (and that's quite a few) makes a CARB certified replacement for the X150. I've conversed with Stuart at Velocity AP, and he has a unit certified for an Aston Vantage that he believes could be fabricated and modified to work in a 5.0L X150, but he doesn't have anything off the shelf.
#32
09-29-2017, 06:26 AM
I've seen most of the threads about the exhaust mod's and fuse 19.
I've just been lucky enough to get a centre section from a XK with the one resonator box so contemplating what to do now!
I'm not sure if to just fit that first to see what the difference is or just go for the the full X pipe?
I do want a louder 'Aston' type sound
but i definately don't want any drone on motorway driving. Currently got fuse 19 out.
(my Subaru was an awful drone!)
Couple of questions:
1. Wouldn't the swap affect back pressure and would it need a re-map?
2. How easy is it to get the standard centre section off without damaging it?
3. Any drone?
4. Where is the best place to get the small X pipe in the UK? is it a weld in job or bolt in?
Cheers for your thoughts!
I've just been lucky enough to get a centre section from a XK with the one resonator box so contemplating what to do now!
I'm not sure if to just fit that first to see what the difference is or just go for the the full X pipe?
I do want a louder 'Aston' type sound
but i definately don't want any drone on motorway driving. Currently got fuse 19 out.(my Subaru was an awful drone!)
Couple of questions:
1. Wouldn't the swap affect back pressure and would it need a re-map?
2. How easy is it to get the standard centre section off without damaging it?
3. Any drone?
4. Where is the best place to get the small X pipe in the UK? is it a weld in job or bolt in?
Cheers for your thoughts!
Very happy with the sound with fuse 19 pulled; wouldn't want it any louder.
#33
09-29-2017, 09:03 AM
Sorry, I am a little late to the party on this one. I did the XK center pipe swap in my garage with the car on jack stands and it was easy. It is truly a bolt on part and I was able to get the original off with no damage so that it could be refitted if desired in the future.
Very happy with the sound with fuse 19 pulled; wouldn't want it any louder.
Very happy with the sound with fuse 19 pulled; wouldn't want it any louder.
#34
09-29-2017, 01:35 PM
Wow wow wow!
pipe now fitted and what a difference. Really happy. Definitely wouldn't want it any louder but a lovely deep sound followed by the end rasp. Seems not to loud when just on the motorway as well. Fuse is out so also got the option to put it back in. Video on my iPhone doesn't do it justice.
On the down side, had the front ARB bushes changed as a 'loose type slight knock' when over rough road. Hard to pin point as sound can move and definitely not just at one side. Shocks seem fine and one side has a new drop link as I snapped stud tightening it! Specialist can't pinpoint either! Bumper has been off recently but can't think it's a panel rattle type noise?. Could it be engine mounts? Really stumped.
pipe now fitted and what a difference. Really happy. Definitely wouldn't want it any louder but a lovely deep sound followed by the end rasp. Seems not to loud when just on the motorway as well. Fuse is out so also got the option to put it back in. Video on my iPhone doesn't do it justice.
On the down side, had the front ARB bushes changed as a 'loose type slight knock' when over rough road. Hard to pin point as sound can move and definitely not just at one side. Shocks seem fine and one side has a new drop link as I snapped stud tightening it! Specialist can't pinpoint either! Bumper has been off recently but can't think it's a panel rattle type noise?. Could it be engine mounts? Really stumped.
#35
09-29-2017, 03:52 PM
Veteran Member
I would take a good hard look at the front caliper retaining springs. Another member suffered a long time before realizing one of the shops 'damaged' the spring and it was allowing the pads to rattle on road bumps. Pretty painful read with two shops failing to repair it and he found it himself.
#36
09-30-2017, 03:16 AM
I would take a good hard look at the front caliper retaining springs. Another member suffered a long time before realizing one of the shops 'damaged' the spring and it was allowing the pads to rattle on road bumps. Pretty painful read with two shops failing to repair it and he found it himself.
#37
10-01-2017, 11:30 AM
I would take a good hard look at the front caliper retaining springs. Another member suffered a long time before realizing one of the shops 'damaged' the spring and it was allowing the pads to rattle on road bumps. Pretty painful read with two shops failing to repair it and he found it himself.
Got a video but only seems to let me attach pictures on here?
Last edited by Swisstone; 10-01-2017 at 12:00 PM.
#38
10-01-2017, 12:38 PM
Veteran Member
#39
10-01-2017, 01:20 PM
#40
10-01-2017, 01:30 PM
Veteran Member