I'm trying to decide which bolts and hardware to use for my front LS1 brake swap to hold the adapter bracket to the spindle and caliper to the bracket. Big Brake Upgrade just gives you eight plain head bolts - with no washers of any sort - to hold everything together: I'm thinking this might be a bad idea. Since these bolts have to provide a lot of clamping force wouldn't it be better to have some sort of washers under the bolt heads, or to just use flange head bolts? On the rear LS1 brake swap I did with factory parts from a 2001 Camaro GM used flange head bolts to hold the Caliper on. Although to hold the abutment bracket to the caliper GM just used plain bolts (with large heads) and no washers.

Has anyone reading this done this swap, and what type and length of bolts did you use? Thanks.

 

I did that swap last year and I used plain bolts no washer. If you use what Big Brake Upgrade uses you will be good.

 

I'd say you'd want to use plenty of Locktite on the bolt threads then so they don't vibrate loose.

 

Looks like the original LS1 front calipers were attached to the spindles with bolts that had washers under their heads:

 

Nope. No washers.