OutCaster

iTrader: (1)

Hi,

Need your help.

What's the difference between fsport brakes for IS350 and IS250? The part numbers are different.

IS350 FSport
PTR09-53083-01
PTR09-53081-01

IS250 FSport
PTR09-53080-01
PTR09-53082-01

Thanks

IZZO2FIZZO

iTrader: (2)

http://fsport.com/#

javyLSU

iTrader: (21)

They use different size pistons in the 250 and 350 calipers.

Javier

GiantsFan

iTrader: (9)

even though the pistons are smaller on the F-Sport IS250 version, is the physical size of the caliper the same as the IS350 version?

javyLSU

iTrader: (21)

The caliper is the same part, it's an ST-60 StopTech caliper.

Javier

GiantsFan

iTrader: (9)

hmm ... well, since the discs, calipers, and the price are the same (ive always seen one price listed...), might as well buy the 350 version to get the bigger pistons (if you have a is250...)

sean2sean

iTrader: (2)

you cant just buy a 350 caliper and fit it on a 250.

the piston size is different for a reason. stoptech test each vehicle with different size and determine which one works best. most likely the master cylinder is different between a 350 and 250.

GiantsFan

iTrader: (9)

actually yes you can. There are many members of this forum who own an IS250 and have bought the 350 brake kit for a BBK look for a cheaper price...

OutCaster

iTrader: (1)

Could you put IS250 FSport Brakes on an IS350? Would there be any noticeable difference in performance?

javyLSU

iTrader: (21)

Why would you put the 250 kit on the 350? Sure, it'll bolt up, but Stoptech took the time to engineer a specific application for use on the IS250, why not take advantage of that? There will be absolutely no performance benefit from doing this - on the contrary, you could actually be worsening your braking performance by not using the kit designed for your car.

Javier

OutCaster

iTrader: (1)

understood, thanks.

sean2sean

iTrader: (2)

If you want to use a 350 caliper on a 250 then its best to install a porportinal valve.....

sean2sean

iTrader: (2)

If you want to use a 350 caliper on a 250 then its best to install a porportinal valve.....