Plan on having all 4 hubs and rotors drilled out to the new bolt pattern. Then for extra piece of mind you should really have some backup washers made and tack welded onto the back of the hub for where your new studs will go through. This would be a good idea because where the stock sutds go through the hubs they are thicker than the rest of the hub.

You can thank qwikredline for taking some pics and drawing out some bolt patterns for that last bit of info.

Cobalt hub with 5x114.3(4.5") PCD layed out


View of hub backside, notice reinforcing area around studs


Here we have some sexy PFC Direct Drive, Floating GAC spec rotor drilled with the GA hubd and stud pattern as well as the 110 pattern(unused holes are the larger pattern, notice the center bore is too large for hub, this is why you need to drill out your rotors to fit on GrandAm hubs)

 

Bringing it back from the dead, any chance Powell RaceShop or any other distributor would be willing to produce a run of re-drilled hubs? I'm sure we could stir up enough interest on CSS alone to make it worth while.

 

they won't re-drill them because of the lack of reinforcement there.

 

G6 GXP Knuckle is the same as GMPP Cobalt competition knuckle right?

 

i believe so.

I saw a picture somewhere of the LSJ, G6, LNF knuckles all lined up. the G6GXP uses same caliper as SS/SC according to maven here in this thread.

 

i do have a a pic of all 3 knuckles lined up together. the g6 gxp is large then the stock sstc and lsj knuckles

 

well John said they used the G6 knuckles on the Race Cobalts...I was just wondering the they were the same as the GM competition knuckles.

 

yes but.....need to be re-drilled

 

ok so yall are confusing so your saying i can take off my stock hubs drill out the 5x114 pattern...and as far as rotors can i just redrill that as well

and thats it??and run my 17x9.5 sbc rpf1

 

Yes...however due to the lack of reinforcement of the hub in that location it wouldn't exactly be safe.