4 Caliper Question and Wheel Check

[jgold47]

I've been reading about doing the NBS 4 caliper upgrade to my 2018.

Near as I can tell, I need the calipers/pads and rotors for any 2019+ truck/suv

will need a few grade 8 washers to help center the caliper.

This may cause the caliper to hit the wheel however. (anyone know if these wheels clear?)

you might be able to grind down the extrusion on the front of the caliper or you may need to use a spacer

Will I need new brake lines (I think the previous generation needed slightly longer ones)
I will also need new caliper bolts (to the carrier on the hub right?)
Will I need new Banjos?

Anyone done this and regretted it?

Does the change in brake bias hard to manage?

Thanks for the answers - have someone locally selling eveyrthing I need for cheap and I've been watching this for a while to do.

thanks!

 

[Marky Dissod]

... been reading about the NBS 4 caliper upgrade to my 2018.

After 27 years, can we stop with the BS, please?

Near as I can tell, I need calipers rotors and pads from any 2019+ (GMTT1xx) truck/suv

Indeed.

will need a few grade 8 washers to help center the caliper.
This may cause the caliper to hit the wheel however. (anyone know if these wheels clear?)

I might be able to grind down the extrusion on the front of the caliper or you may need to use a spacer

Here are some helpful links in case you want to grind down the calipers:

4 piston calipers fitment with which wheels, list. - PerformanceTrucks.net Forums

GMT K2xx Trucks General Discussion - 4 piston calipers fitment with which wheels, list. - The 2020+ optional 4 piston fixed calipers have already started replacing the NNBS brake upgrade, and fits on NBS, NNBS, and K2XX. Its been reported that some 17s are fitting and some aren't. (There may...

www.performancetrucks.net

4 piston calipers fitment with which wheels, list. - PerformanceTrucks.net Forums

GMT K2xx Trucks General Discussion - 4 piston calipers fitment with which wheels, list. - The 2020+ optional 4 piston fixed calipers have already started replacing the NNBS brake upgrade, and fits on NBS, NNBS, and K2XX. Its been reported that some 17s are fitting and some aren't. (There may...

www.performancetrucks.net

That thread also mentions which washers you'd need to use to nudge the caliper so the rotors are centered in the caliper.
I bet it also mentions if those wheels will clear without caliper grinding.

Will I need new brake lines (I think the previous generation needed slightly longer ones)
I will also need new caliper bolts (to the carrier on the hub right?)
Will I need new Banjos?

The thread I linked to is VERY long, but it eventually covers almost everything you need to know.

Anyone done this and regretted it?

Very strongly doubt it.

Is the change in brake bias hard to manage?

Huh? By which I mean, I've not read any complaints about any brake bias change.