XKR brake upgrades - XKRS 380mm possible?
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Joined: May 2013
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From: London, UK
Here's the full list:
4.2 XK: 326x30mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 XKR: 355x32mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 Alcon: 400x36mm front, six pistons (38.1, 34.9 & 30.2mm), fixed calliper; 350x28mm rear, quad 32mm pistons, fixed calliper
5.0 XK: 355x32mm front, single 60mm piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
5.0 XKR: 380x36mm front, dual 42mm pistons, floating calliper; 376x26mm rear, single 45mm piston, floating calliper
R-S GT: 398x38mm carbon-ceramic front, six pistons (38, 34 & 30mm), fixed calliper; 380x34mm carbon-ceramic rear, quad 30mm pistons, fixed calliper
4.2 XK: 326x30mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 XKR: 355x32mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 Alcon: 400x36mm front, six pistons (38.1, 34.9 & 30.2mm), fixed calliper; 350x28mm rear, quad 32mm pistons, fixed calliper
5.0 XK: 355x32mm front, single 60mm piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
5.0 XKR: 380x36mm front, dual 42mm pistons, floating calliper; 376x26mm rear, single 45mm piston, floating calliper
R-S GT: 398x38mm carbon-ceramic front, six pistons (38, 34 & 30mm), fixed calliper; 380x34mm carbon-ceramic rear, quad 30mm pistons, fixed calliper
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Junior Member
Joined: Apr 2014
Posts: 24
Likes: 14
From: Bavaria
Here's the full list:
4.2 XK: 326x30mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 XKR: 355x32mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 Alcon: 400x36mm front, six pistons (38.1, 34.9 & 30.2mm), fixed calliper; 350x28mm rear, quad 32mm pistons, fixed calliper
5.0 XK: 355x32mm front, single 60mm piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
5.0 XKR: 380x36mm front, dual 42mm pistons, floating calliper; 376x26mm rear, single 45mm piston, floating calliper
R-S GT: 398x38mm carbon-ceramic front, six pistons (38, 34 & 30mm), fixed calliper; 380x34mm carbon-ceramic rear, quad 30mm pistons, fixed calliper
4.2 XK: 326x30mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 XKR: 355x32mm front, single piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
4.2 Alcon: 400x36mm front, six pistons (38.1, 34.9 & 30.2mm), fixed calliper; 350x28mm rear, quad 32mm pistons, fixed calliper
5.0 XK: 355x32mm front, single 60mm piston, floating calliper; 326x20mm rear, single 45mm piston, floating calliper
5.0 XKR: 380x36mm front, dual 42mm pistons, floating calliper; 376x26mm rear, single 45mm piston, floating calliper
R-S GT: 398x38mm carbon-ceramic front, six pistons (38, 34 & 30mm), fixed calliper; 380x34mm carbon-ceramic rear, quad 30mm pistons, fixed calliper
Veteran Member
Joined: May 2013
Posts: 3,425
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From: London, UK
I don't know - I'd say your best upgrade would be the Alcon package, since it was designed for the 4.2.
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Joined: Sep 2015
Posts: 20
Likes: 0
From: paris
Hello,
I have a 2010 XKR I wNt to convert to alcon.
I have calipers, discs and pads.
Just wondering if the parking brake cables of the stock 2010 XKR would be same as the required for the alcons.
If I need these cables, could anyone help me with the part numbers to order for lh and rh ?
Thanks a million,
Seb
I have a 2010 XKR I wNt to convert to alcon.
I have calipers, discs and pads.
Just wondering if the parking brake cables of the stock 2010 XKR would be same as the required for the alcons.
If I need these cables, could anyone help me with the part numbers to order for lh and rh ?
Thanks a million,
Seb
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Joined: Oct 2015
Posts: 2,181
Likes: 656
From: Carolinas
I'm gonna necro this thread.
I'm considering going to less dusty brake pads, and slotted rotors for my 4.2L, and it is about time for a brake fluid flush.
Nearly all the labor in a switch I'll be encountering. Seems to me that if 5.0L XKR brake parts are a direct swap, this would be a good time to approach. I'm frequently at locations without internet right now, so its a little difficult for me to personally dig and research.
Calipers, caliper mounts, rotors, pads, dust shields, is there anything else different? Aftermarket on calipers & mounts vs stock?
I'm considering going to less dusty brake pads, and slotted rotors for my 4.2L, and it is about time for a brake fluid flush.
Nearly all the labor in a switch I'll be encountering. Seems to me that if 5.0L XKR brake parts are a direct swap, this would be a good time to approach. I'm frequently at locations without internet right now, so its a little difficult for me to personally dig and research.
Calipers, caliper mounts, rotors, pads, dust shields, is there anything else different? Aftermarket on calipers & mounts vs stock?
Veteran Member
Joined: Oct 2015
Posts: 2,181
Likes: 656
From: Carolinas
Digging around today I found a post regarding aftermarket.
It looks like the different OEM setups are the way to go. I still wonder what I would need beyond Calipers, Rotors, and Pads to go with the 2010+ XKR brakes on my 2007 XK.
It looks like the different OEM setups are the way to go. I still wonder what I would need beyond Calipers, Rotors, and Pads to go with the 2010+ XKR brakes on my 2007 XK.
I just went through a a few months of finding brakes for the my '13 XKR and talked to Brembo, Alcon, AP and no one makes the correct brackets and calipers that fit other then Alcon. Alcon made a 6 piston front and 4 piston rear optional for the the portfolio edition.
Now comes the fun part they are out of stock worldwide as I spent the past month with SNG Barrett finding the right parts. They did a fantastic job finding the parts but it took jag putting out a world wide search for them. If you want a brake upgrade I suggest contacting Tony at SNG as I know he has a right side caliper in stock but will probably have to search for the left.
Finding brakes for this car is NO joke in effort as I found out, but am very happy with the results.
BTW When i spoke with Brembo they were going to try and make a custom kit but decided it wasn't worth the effort, so I doubt those fit properly. Please don't take chances with brakes as it can be obviously very dangerous.
Now comes the fun part they are out of stock worldwide as I spent the past month with SNG Barrett finding the right parts. They did a fantastic job finding the parts but it took jag putting out a world wide search for them. If you want a brake upgrade I suggest contacting Tony at SNG as I know he has a right side caliper in stock but will probably have to search for the left.
Finding brakes for this car is NO joke in effort as I found out, but am very happy with the results.
BTW When i spoke with Brembo they were going to try and make a custom kit but decided it wasn't worth the effort, so I doubt those fit properly. Please don't take chances with brakes as it can be obviously very dangerous.
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