Guest Cillian Posted January 17, 2017 Share Posted January 17, 2017 Hi all, I've recently fitted LS400 front brakes to my Supra, i also have the rear brakes available. Has anyone fitted the Rear brakes to a Supra yet? If so, what parts did you need / make any adjustments? If this possible i'll create a definitive guide thread for everyone as i can't find a full answer from searching. Thanks Quote Link to comment Share on other sites More sharing options...
Guest Cillian Posted January 20, 2017 Share Posted January 20, 2017 I found a thread where one guy mentioned he fitted them but didn't elaborate on it. Anyone else want to help out? Thanks Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted January 20, 2017 Share Posted January 20, 2017 As far as I know you can't do a straight swap but I'm sure there will be a way. Money makes anything possible so might not be a viable route to follow. Quote Link to comment Share on other sites More sharing options...
Guest Cillian Posted January 20, 2017 Share Posted January 20, 2017 As far as I know you can't do a straight swap but I'm sure there will be a way. Money makes anything possible so might not be a viable route to follow. Yes i would just like to have some clarity, it'll help others in future too if it can be posted here! I don't mind a little bit of work to get something to fit Quote Link to comment Share on other sites More sharing options...
garethr Posted January 21, 2017 Share Posted January 21, 2017 If we are talking about the UCF20 brakes, I'm not sure if they fit, and even if they do, they are not an upgrade. Quote Link to comment Share on other sites More sharing options...
Guest Cillian Posted January 26, 2017 Share Posted January 26, 2017 If we are talking about the UCF20 brakes, I'm not sure if they fit, and even if they do, they are not an upgrade. yeah i know they wouldn't be an upgrade, its mainly the fact they are aluminium and not cast Iron is why i want to swap them out. I found a thread on here where one guy had them fitted but he didn't elaborate on it. Surely someone else has it done? Quote Link to comment Share on other sites More sharing options...
garethr Posted January 26, 2017 Share Posted January 26, 2017 (edited) Interesting, I didn't know that they are alloy. Looks like the pistons are smaller than J-spec Supra (c. 38mm vs c. 43mm). I assume that, if the caliper bolt spacing is different, you'd have use the LS400 caliper bracket and figure out an adaptor to bolt it to the Supra hub. Edited January 26, 2017 by garethr (see edit history) Quote Link to comment Share on other sites More sharing options...
Guest Cillian Posted January 26, 2017 Share Posted January 26, 2017 Interesting, I didn't know that they are alloy. Its the main reason i want to swap them really. I swapped the front ones out as i had a seized caliper, even with poor pads its a noticeable difference Quote Link to comment Share on other sites More sharing options...
Josh42 Posted January 26, 2017 Share Posted January 26, 2017 I'm pretty sure I've read that they don't fit, but interestingly, I did see someone fit a set of Impreza rear brembos in replacement for JSpec rears! Quote Link to comment Share on other sites More sharing options...
Guest Cillian Posted May 3, 2017 Share Posted May 3, 2017 (edited) Just thought i would update everyone here so anyone else searching can have an answer, I managed to get the LS400 UCF20 rear brakes to fit. I had to use the original Supra J spec NA rear caliper brackets that bolt to the hub and then use the aluminium LS400 rear caliper section that carries the piston. There is a noticeable weight difference between the two, with the LS400 caliper body being larger and the piston also looks bigger. I reused the original Supra brake line, everything bolts straight on. Reason i swapped them out was I had noticed one of my rear Supra calipers was sticking and the other one didn't work at all it was so badly seized. Also, the LS400 brake pads seemed to fit just fine too, whether they are the same part number or not i don't know. Anyways, now we all have a definite tried and tested answer. Edited May 4, 2017 by Cillian spelling update (see edit history) Quote Link to comment Share on other sites More sharing options...
AC93 Posted May 3, 2017 Share Posted May 3, 2017 Thanks for updating! Quote Link to comment Share on other sites More sharing options...
Dnk Posted May 3, 2017 Share Posted May 3, 2017 (edited) I could be wrong as my memories not that great but aren't the UK spec rear calipers all aluminium ? Certainly look it in the photos i took when i stripped a set around 5 years ago I know the fronts are cast aluminium on the inner half and cast steel on the outer which is clear to see in this photo Edited May 3, 2017 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Guest Cillian Posted May 4, 2017 Share Posted May 4, 2017 Thanks for updating! Happy to give back to the community, a lot of threads on here don't get updated when someone finds a solution to something. I could be wrong as my memories not that great but aren't the UK spec rear calipers all aluminium ? Certainly look it in the photos i took when i stripped a set around 5 years ago I know the fronts are cast aluminium on the inner half and cast steel on the outer which is clear to see in this photo I couldn't tell you as i've never seen the turbo brakes up close but you are right there, those rear calipers look like aluminum. I guess the LS400 calipers just offer a cost effective upgrade to anyone that wants to have better, non seizing calipers on their NA. They cost me about €180 all in, i don't on doing any sort of track days with this car so there was no need to go crazy on big brake i'll never get the use out of. Quote Link to comment Share on other sites More sharing options...
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