ive been lurking this for a long time now, cannot find a clear answer though.
i want to start drifting and although it may not be necessary to upgrade, i would still like to. from my understanding the ls4 rotors/calipers will be a direct bolt on, but i dont ever see any people do more than the fronts (unless they found a TT set, in most cases they do all 4 corners).
so my questions are:
have i searched enough to be correct that they bolt on? and if it is, do i need the bracket that goes around the caliper?
do people upgrade the rears? (never see any pictures in threads about it)

 

Supra TT Rears > SC400 Rears > SC300 Rears

Supra TT Calipers bolt on from what I read. LS400 fronts pair well with SC400 rears so that's why people usually don't upgrade the rears. The SC400 rears are not bad to begin with.

 

So for a SC300 stock SC400 brakes are an upgrade? How much larger are they?

 

I don't have size comparison numbers but the SC400 rear calipers are identical to Supra MKIV NA rear calipers and 98-00 SC300 rear calipers. Take that as you will in terms of a braking bias improvement.

Fronts make the most difference. I ran TT front calipers with the stock 92-97 SC300 rears for over two years and enjoyed the combination very much. This last month I finally installed TT rear calipers. I assure you, on the street you CAN feel a distinct difference by switching to TT calipers all around but this will probably make the biggest impact on the track. On the street the full combination just feels far more coordinated than before, slowing the car down evenly rather than with a heavy front bias. This shows more with very aggressive braking, however.

The bias will be a bit mismatched with TT front and 92-97 SC300 rears but under most driving conditions you won't notice it much. The SC4/MKIV-NA/98+SC3 rears can help but I haven't heard of many people going to the trouble unless they're willing to get TT rears anyway.

Whether you NEED them or not is a matter of opinion depending on how you use your car. Under the most extreme racing conditions or high horsepower builds I'd recommend both ends be converted.

Under ALL driving conditions I feel LS400 or TT front calipers should be done, no question. On the SC300 92-97, the front rotors are smaller than the rear rotors.

 

thank you for the feedback, i feel like a fool for not picking the sc400 rears, calipers/rotors for $60 when i had the chance today.
wish i knew how to make the facepalm emoji haha

 

Well I'm going to do LS400 fronts soon and might do the SC4 rears while I'm at it

 

What's the price for TT rear calipers these days?

 

alot. It would be interesting to find another caliper to stick on the rear maybe from another toyota with an adapter, or even the front sc brakes on the rear, but the front brakes I never wanted to do because after swapping them out for the ls400 brakes I realized how heavy those things are and they will never ever ever go back onto my sc again.

I think the ls400 rears are single piston but like the sc400 I would assume they are larger than the 300.
really we just need a simple 2 piston caliper for the rear that doesn't cost an arm and a leg.

 

I was just browsing RockAuto and Summit looking at the Power Stop kits. Drilled and slotted rotors gives a nice look through some open spoked wheels

 

many run the drilled and/or slotted when upgrading, they are not much more than regular rotors in most cases, I grabbed a set of LS400 drilled and slotted rotors for the front when I did mine, and just got regular sc300 drilled and slotted to match for the rears.