Conversions & Hybrids - LS1 and LS6
10-19-2009, 01:27 PM
How can you tell the different between the 2 by looking at it ?
10-19-2009, 03:40 PM
Look at the casting numbers on the back of the block.
Pop N Wood
10-19-2009, 06:09 PM
Check the price tag.
10-19-2009, 09:11 PM
Heads (243s) will be the only visible (external) difference if the engine is still stock. The later LS1 used the LS6 blocks and intakes; block casting numbers won't help in those cases.
10-20-2009, 12:08 AM
10-20-2009, 07:50 AM
2001 & up LS1's used the LS6 intakes. The casting number 243, on the front top corners of heads, will indicate an LS6 engine, if original. Casting number 241 indicates an LS1.
10-20-2009, 05:31 PM
Sorry guys. I meant intake.
10-20-2009, 05:55 PM
ls1 wavy on the bottom, ls6 flat
10-20-2009, 08:56 PM
any compare pics
10-20-2009, 09:56 PM
LS1 has EGR, LS6 doesn't. Check part #'s..some og the Vette LS1's didn't have EGR and people try to pawn them off as LS6's.
10-21-2009, 09:47 AM
The LS6 has the flat bottom like the pic on the left, the pic on the right is the 'humped up' bottom of an LS1 intake.
10-21-2009, 10:52 AM
Thanks guys. Now I know what to look for , I got screw from a seller saying it a LS6 intake
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