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Old 08-01-2007, 05:59 pm   #1
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Does anyone know what manifold I have on my 98 coupe? The part number on it is 256333. Is this an LS1 manifold?
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Old 08-01-2007, 06:29 pm   #2
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I just looked at my old LS1 in my garage since I just did the LS6 intake swap mod.

My old states 12556333 on it so I think it is safe to assume yours is an LS1 intake.

My paper work for my LS6 states 88894339.
Now go play with your tools!


1998 6-speed Coupe. Z06 exhaust, Z06 sway bars, C6 Z06 Shifter, LS6 Intake Manifold, K&N FIPK, Vararam Velocity Stack, stainless steel brake lines, Borla X pipe, Z06 shocks. SAE Dyno Numbers 330 RWHP/340 RWTQ
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Old 08-02-2007, 06:00 am   #3
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thanks!
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Old 08-02-2007, 06:38 am   #4
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HI there,
Another way to determine this is to look at the coolant bypass pipe underneath the intake.
01-04 intakes were unable to have a pipe pass underneath, whereas the 97-00 intakes had enough room.
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