Diff between 35i and 35is front brakes?

[Christopher72]

There's different part numbers for the 35i and 35is front calipers... but visually, I'm not seeing a difference. Why the different part #?

 

[B21]

Some markets had the 330mm discs and a ‘square’ pad for the 35i..also smaller diameter disc on rear..

In European markets the 35i had the same discs as the 35is ..larger discs front and rear with a more elongated front pad..

 

[Christopher72]

Worth the upgrade from the 35i to 35is caliper and rotor, or not much difference? I'm guessing its not going to be as significant as a 2, 4 or 6 piston upgrade.

 

[B21]

The 330 disc n pad set up was quite effective on the 28i and 30i

The larger 35is disc set up was never criticised for being too weak for most folks..

The cheap Brembo BBK 6 pot bolts on for around 1,500 usd..

https://www.bimmerworld.com/Genuine-BMW-Performance-Front-Brake-Kit-E90-E92-325i-328i-34110444738.html

 

[mcbutler]

Worth the upgrade from the 35i to 35is caliper and rotor, or not much difference? I'm guessing its not going to be as significant as a 2, 4 or 6 piston upgrade.

Nope - try a set of EBC REDSTUFF PADS I use them on my 35i and the feel/stopping power is a LOT better. Also pretty much dust free so no more marked wheels