Will stoptech 4piston rears fit with iforged 5" lip?

[LS6 Molester]

Im planning on my BBK and rims now and i wanted to get the stop tech 6 piston fronts and 4 pistons rears along with some 19" astras with a 5" lip. does anyone use this combo or know if it will fit?

i asked iforged and showed them the tech info on the caliper and they said it will be close and it should but they are not 100% sure.

any help would be great. thanks

 

[Tom F&L GoR]

You have a PM.