[BasherBell]

Im looking at a new set of pistons and barrels as they are oval.
Looking at the Pet Im confused as to what each Part difference is, when hunting down prices there is a wide variation. Can anyone enlighten me. Tried to search the web to see if any better explanations can be found and had no success

Part PCG 503 1890 Cylinder with piston complete FA Mahle only by sets 911T-E T-V
Part PCG 503 1590 Cylinder with piston complete FA Mahle only by sets 911T-E T-V

Part 91110394001 Cylinder with piston complete group 5 911 T-K
Part 91110394002 Cylinder with piston complete group 6 911 T-K
Part 91110394205 Cylinder with piston complete group 5 Schmidt 911 T-K
Part 91110394206 Cylinder with piston complete group 6 Schmidt 911 T-K

Finally idiots question but Im going to ask it anyway. Could I stick in the 911S Pistons and Barrels and run it without changing anything else ?
Cheers from UK
Dave