:lol: The label is currently being used by GMPP for their top of the line race block. It stands for

Lets Spend Xtra :lol:

That makes me feel mutch better :willy:

Awesome you have the LSX block cool...Well it's a Ls1 ....O..... No really it means the same....... come back, hey come back...... really it's the same

The engines are so good I thought it stood for Like Sex.

They make them for Charlie's cars

LSX "Lillard Series eXtreme"

I usually see it as capitol X means the Iron LSX block

lower case x just denotes a LS series engine LSx

I never understood why the LS2 is referred to as the Gen IV and the LS3 as the Gen V. They're both the same type and design as the LS1 save for a few non-interchangeable parts. I don't know....to me the whole LSX family is the 3rd generation of GM engines. An engine would have to be completely new from the ground up and have little in common with the Gen III for it to be considered a Gen IV.

But then that's just me thinking out loud again. :D

Me either, since we all know that an LS2 is a 1973 SD-455 Pontiac engine.:unibrow: