2012 Sierra RCSB 5.3 build thread @ New Era Performance
#343
Yes, the heads are completely untouched. They were removed last year, just to get rid of the DOD lifters and replace the head gaskets with LS9 gaskets and fasten them back down with ARP studs.
#346
We are hoping to possibly get to the track this Friday to see how the truck does on this new set up.
#347
#348







