thank your reply

 

 

The 250 front calipers are floating calipers, so they require a bracket. The 350 calipers are fixed calipers, so basically the bracket is built into them.
You can see some pics of the transformation of the 250 to 350 calipers (on an AWD): https://www.clublexus.com/forums/bui...l#post10158779

 

 

I guess you can say the mounting bracket isn't included...cause there isn't one for the 350 lol
The rear calipers on the all the 3IS's are floating calipers, so they all have brackets.
The 350 front caliper bolts directly to the steering knuckle...you can use the same bolts from the 250 that hold the bracket to the steering knuckle.

The dust shields i replaced. They were $15 each I believe, and are different if you have AWD opposed to RWD.
For AWD to replace the dust shields it's definitely more work, but it's looks so much cleaner after, and it's done right.
Not to knock or judge anyone that "modified" the shield, I just prefer it to be proper.
If you have a RWD it's much easier.
I would recommend getting two bolts that are longer than the ones that hold the wheel bearing assembly onto the knuckle, and an air hammer.
Using the two bolts installed diagonally, you carefully air hammer each one alternately, and the wheel bearing assembly will pop right out...if it was rusted in like mine...but that's due to environment mostly.
In those warmer climates, you could probably use the original bolts, just loosened 4 or 5 threads, and some love taps with a regular hammer.

 

Hi, I am looking to do the is 350 brake conversion for my 250. In most of the post I have found, everyone seems to "modified" the dust shield. I like to do things proper myself and was wondering the parts number for the dust shield that you replaced it with?

Thank you Sasnuke

 

Here's my complete parts list...keeping in mind my 250 is AWD:


If your 250 is a RWD, then the rotors and backing plates are different part numbers.

 

hey guys, so I'm doing my 250 to 350 conversion tomorrow, but I was curious what did you guys do about the rear setup? did you change the calipers and rotors too? because aren't they different in size, or did you guys just paint the calipers to match your new front brakes? thanks. Im guessing ill just paint my rear calipers to match my fronts

 

For the rears I didn't do anything...just left the 250 rear brakes.
Yes...the 350 rear brakes are bigger, but you likely won't notice the difference unless you park the two versions of the car back to back.
Also, with the rear only doing about 35% of the braking, it's not worth the hassle of swapping it as well.