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LS1 and LS6

Conversions & Swaps LSX Engines in Non-LSX Vehicles

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Old

Oct 19, 2009 | 01:27 PM

#1

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Launching!

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LS1 and LS6

How can you tell the different between the 2 by looking at it ?

Old

Oct 19, 2009 | 03:40 PM

#2

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Look at the casting numbers on the back of the block.

Old

Oct 19, 2009 | 06:09 PM

#3

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Check the price tag.

Old

Oct 19, 2009 | 09:11 PM

#4

On The Tree

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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.

Old

Oct 20, 2009 | 12:08 AM

#5

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Ask it.

Old

Oct 20, 2009 | 07:50 AM

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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.

Old

Oct 20, 2009 | 05:31 PM

#7

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Launching!

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Sorry guys. I meant intake.

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Old

Oct 20, 2009 | 05:55 PM

#8

12thstreetjunkman

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ls1 wavy on the bottom, ls6 flat

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Old

Oct 20, 2009 | 08:56 PM

#9

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Launching!

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any compare pics

thanks
Lenny

Old

Oct 20, 2009 | 09:56 PM

#10

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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.

Old

Oct 21, 2009 | 09:47 AM

#11

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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.

Attached Thumbnails

LS1 and LS6-000083-.jpg

LS1 and LS6-photo1426.jpg

Old

Oct 21, 2009 | 10:52 AM

#12

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Thanks guys. Now I know what to look for , I got screw from a seller saying it a LS6 intake

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