ls2 question
Different parts: Manifold, Throttle Body , and possibly the Crank Timing Sensor (GTO's 04 to 06 had the 24x crank sensor). The newer TBSS's might have the 58x crank sensor.
Differences between an LS1 and LS2: heads, manifold, and cam on the topend... with piston's, block, cam timing sensor location, and knock sensor location on the bottom end.
And thats just the general differences.
Manifolds go like this. LS6>LS2>LS1
Heads go like this LS6>LS2 (ls6 has lighter valves)>LS1
they are the same heads and everything, same size valves, just the LS6 ones have lighter valves, which in the end doesn't really mean much if anything at all.


