jeremy

iTrader: (1)

i'm looking to swap some s4 4 piston calipers into a s5. is this a diect swap? i'm looking to do the fronts and rears. i never found any info searcing on s4 to s5 swap.

Ni5mo180SX

I believe it should be fairly straightforward swap. The hardlines may be different but im not sure, I used SS lines.

M5150

yup, ive done it, completely straightforward swap

Silkworm

Yep, straight swap. Don't forget the two hardlines off the S4 calipers.

PaulC

Scott 89t2

so you are just trying to put 4 piston brakes onto an s5 single piston car?

need calipers and pads and lines (s4 and s5 4 piston are the same...) I'd guess that you'd need the rotors too.

Bruhman

Jeremy. I just did this last week.
As far as the front goes all s5 's came with 5 lug vented rotors the same size as the s4 5 lug with 4 piston calipers. (Use the best looking rotors of the four.) The only difference was that the s4 brake line was rubber from the fender to the strut assembly and then steel tubing from the strut to the to the caliper.
On s5 with single piston calipers they had rubber hoses all the way from the fender to the caliper. I used the steel lines from the s4 when I swapped mine.
The rear is a slightly different story. The rear rotors on the s4 are vented and also a little bit bigger in diameter and in thickness. The s5 rotors are not vented and they are a little bit smaller. So you have to swap out the rear calipers and the rear rotors.

BTW, Don't forget that the rear calipers have to be screwed in and not squeesed in with a C-clamp when you change your brakes.

Brett.