Looking at getting either 243 Heads or now I see these 317 Heads from an LQ9/LQ4 motor....what would be the difference?? Please help, searched but couldn't find anything real informational.
This is off topic, but I have a question concerning the valve springs on the stock ls2 heads. Are the ls2 springs weaker than the ones on the 243 heads off the 02-04 z06? The Z06 ones are good to .570 lift I believe, wondering what the ls2 ones are, if they can support the Z06 camshaft. Also can you tell the difference between the springs on each of the heads, are they a different color or anything?
Thanks for the reply however my initial post had a typing error in it sorry, ive got an LS2 not LS3 so would need them to fit the LS2 and for FI reasons the originally mentioned heads are ideal for lowering the compression ratio so was looking at them but not sure if they will bolt onto the LS2 without mods?