IS350 brake upgrade on IS250 - parts confirmation
09-19-17, 01:19 PM
#16
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The rear suspension design on the 3IS necessitated a different knuckle design. The calipers were moved from a trailing position to a leading position. The mounting is different as is where the bleeder, etc., is placed. The late model 2IS models did have updated rear brake calipers (along with larger mounting bolts), however these also cannot be used on earlier 2IS models without swapping out the rear knuckles.
The front backing plates are cheap and relatively easy to change (if the bearing assemblies come out from the knuckle easily), so I'd recommend changing them. The rears are harder and more expensive, cutting can work well here (the rotor size difference is not as pronounced as on the front).
Make sure the rear calipers you get match the year of car you have. The ones you have in your cart look to be for an early model 2IS, I believe.
Jeff
The front backing plates are cheap and relatively easy to change (if the bearing assemblies come out from the knuckle easily), so I'd recommend changing them. The rears are harder and more expensive, cutting can work well here (the rotor size difference is not as pronounced as on the front).
Make sure the rear calipers you get match the year of car you have. The ones you have in your cart look to be for an early model 2IS, I believe.
Jeff
I'm attaching the brake dust shields (front) I've purchased in hopes it may help someone in the future
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Jbreezie (03-14-19)
06-01-20, 08:28 AM
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Upgrading is250 front brakes to is350
hi i am Upgrading is250 front brakes to is350 i have the clappers but i am not sure of the rotor size I need if anyone could help it would be very appreciated thanks
06-01-20, 08:30 AM
#20
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What year is your IS250? Is it AWD or RWD?
That will help determine what rotors you need.
That will help determine what rotors you need.
06-01-20, 09:09 AM
#22
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As this is the 3IS forum (2014+), the rotor fitment from our vehicles may not be exactly the same for your 2IS.
Rather than guess and steer you incorrectly, you may want to pose your question on the 2IS (2006-2013) forum (https://www.clublexus.com/forums/is-...2006-2013-163/)...they also have a Suspension and Brake section, or you can post it in the General chat as well.
While to calipers are the same from 2006 to present for the 350, not sure if the rotors/pads/backing plates are exactly the same. Pad compound will likely vary even though physical size may be the same.
Rather than guess and steer you incorrectly, you may want to pose your question on the 2IS (2006-2013) forum (https://www.clublexus.com/forums/is-...2006-2013-163/)...they also have a Suspension and Brake section, or you can post it in the General chat as well.
While to calipers are the same from 2006 to present for the 350, not sure if the rotors/pads/backing plates are exactly the same. Pad compound will likely vary even though physical size may be the same.
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