2nd Generation Specific 1986-1992 Discussion

Intake Manifold

Old 02-29-2004, 01:10 AM
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would a series 5 intake manifold work on a series 4 engine. because I have a series 4, and i'm trying to switch my intake manifold out with a j-spec manifold to get rid of all the smog stuff. the only j-spec manifolds I'm finding are series 5. are they interchangable?



Oh yeah are the turbo II intake manifolds different from the NA manifolds?
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Old 02-29-2004, 01:12 AM
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UIM yes



LIM no
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Old 02-29-2004, 01:18 AM
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would I be better off just looking for a series 4 j-spec manifold?
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Old 02-29-2004, 01:20 AM
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i'm new to Turbo II's and I have my smog pump and cats removed. and I was told to swap my intake manifold out with j-spec manifolds. can someone explain the big difference between the two to me.
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Old 02-29-2004, 01:35 PM
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n/a s4's and s5's have six ports though u cant swap the lower manifolds like frestyle pointed out.

the tII's have 4 ports so u might as well forget about putting it on an n/a......by the way, frestyle, if u REALLY wanted to, could u somehow be able to swap a TII manifold onto a 6 port??????
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Old 02-29-2004, 01:36 PM
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u havent stated if you have an n/a or turbo but talk about both so i dont know which ur talking about
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Old 02-29-2004, 06:59 PM
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I've got a series 4 Turbo II. anyone know where I can get a series 4 j-spec manifold at a reasonable price.,
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Old 02-29-2004, 07:47 PM
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6 port manifolds also meet the upper manifold much lower than the turbo manifolds.



S5 6 port upper half also has VDI, the S4 doesn't.



Yes you can match a turbo 4 port lower manifold to a 6 port keg, and port match it as best at possible, but it's probably not the best solution. It can be done though.
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