bore and stroker kits
#1
#5
bore and stroker kits
I don't know what the biggest is, but I would suggest you call up FST or Powroll or other shops and talk to them. As far as losing reliability, the extra power will stress the rest of you engine and drivetrain that wasn't made for a bigger motor. You are also generating more heat. A lot of the reliability will depend on the knowledge of the engine builder and your mechanical knowledge and maintenance.
#7