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how can i tell the difference between LS6 and LS1 intakes?

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Old 07-07-2005, 06:01 PM
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Default how can i tell the difference between LS6 and LS1 intakes?

part #'s? any differences in the shape? i have a 99C5. thanks.
Old 07-07-2005, 06:12 PM
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The only way I know how to tell the diff is from underneath. The LS6 is flat underneath. Im sure the part number on the side of it will tell also.
Old 07-07-2005, 06:24 PM
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Originally Posted by Y2K SS
The only way I know how to tell the diff is from underneath. The LS6 is flat underneath. Im sure the part number on the side of it will tell also.
ok thanks.
Old 07-07-2005, 06:42 PM
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So the only way to tell if its a LS6 is by removing it then looking underneith?
Old 07-07-2005, 11:48 PM
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"- The only way to tell 100% if you are buying an ls6 intake, especially used is to ask for pics of the bottom. The vette LS1 intake does not have an EGR provision so its easy to pass that off as an LS6 if you are none the wiser. The difference between the LS1 and LS6 intakes can be see here; the ls1 intake is on the left and the ls6 is on the right."
from jrp's mod guide
Old 07-08-2005, 01:46 AM
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If the intake came off any LS1 motor 2001 + it is an LS6 intake.
Vette intakes have copper inserts by TB for fly by wire while f-body don't.
Old 07-09-2005, 10:29 AM
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looks like i got an LS6 intake. thanks guys. as always, you came through for me
i will be putting on the heads and cam in next week and will post my results.
going in: LS6 intake, asp pulley, MTI stageII heads milled .03, MTI stealthII cam, LS2 timing chain, new oil pump with o rings.
Old 07-09-2005, 10:46 AM
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Part no. Is 12573572 ...fyi.
Old 07-09-2005, 11:00 AM
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Ive been searching and searching through the forums trying to find what parts I need to install this manifold. Can someone who has bought and installed everything and that knows whats right please post up the part numbers so that theres no confusion?
not meaning to highjack the thread, just wanted to get this straightened out for everyone. Thanks
Old 07-09-2005, 12:11 PM
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*Note: Must order GM Part#: 12578838 (Coolant pipe) & 2 - 12563325 (Coolant plugs) to re-route coolant passages for LS6 intake. These are listed for $28.36 on gmpartsdirect.com.

However, SDPC states: "You will need a new air bleed pipe (12568478) and 2 plugs (12563325) to convert a '97-'00 LS1 to the new LS6 intake."
Old 07-09-2005, 03:39 PM
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Originally Posted by NOSjohn
*Note: Must order GM Part#: 12578838 (Coolant pipe) & 2 - 12563325 (Coolant plugs) to re-route coolant passages for LS6 intake. These are listed for $28.36 on gmpartsdirect.com.

However, SDPC states: "You will need a new air bleed pipe (12568478) and 2 plugs (12563325) to convert a '97-'00 LS1 to the new LS6 intake."
could any of these have come attached to the LS6 intake i just got? will i still need them for my 99 vette? thanks
p.s. i have already done the coolant bypass on the vette.
Old 07-10-2005, 01:21 AM
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No real way to tell unless you take pics of it. The cross-over pipe looks like a small diameter pipe in a kind of flattened U shape.
Old 07-10-2005, 02:17 AM
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The best way is to use search as this has been covered extensively with prt #'s & pic's.



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