Mine is completely red, but yeah it would appear looking inside the plenum would be the best step to ensure it is genuine. 
LT4 intake manifold
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Make sure to ask for pics of the bottom of the intake. The entire intake is powder coated. Not just the outside. If someone merely painted one odds are they didn't paint the bottom side.
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FYI, I would never give out my phone number on a public forum, ask someone to PM you for the number next time.
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I have found 4. 1) is sold. 2) Is a complete lt1 motor cammed, ported and polished lt4 heads, intake, large injectors, roller rockers etc.,ran when took out but had a small rod knock, complete, a steal @ $350. Pick up in Alabama. 3) is sold. 4) new in the box $400.
Last edited by lt1-xjs; Jan 29, 2015 at 12:40 AM.
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You do understand the extra meat above the intake ports is the only difference right?
Internally they are the late small trapezoidal port LT1 intake. Seems like most 95 and older stuff was more rectangular and larger.
The LT4 heads had big ports but the intake did not, this also means a little TIG work can make an LT1 intake a really good substitute, add material above the port so it can be port matched to a head with a bigger intake port.
Internally they are the late small trapezoidal port LT1 intake. Seems like most 95 and older stuff was more rectangular and larger.
The LT4 heads had big ports but the intake did not, this also means a little TIG work can make an LT1 intake a really good substitute, add material above the port so it can be port matched to a head with a bigger intake port.
It should be common knowledge but it really isn't. See the guy below you asking $400 as evidence that many people still suffer a delusion it is special.
Right, but most do not bother painting the bottom or inside the plenum.
You do understand the extra meat above the intake ports is the only difference right?
Internally they are the late small trapezoidal port LT1 intake. Seems like most 95 and older stuff was more rectangular and larger.
The LT4 heads had big ports but the intake did not, this also means a little TIG work can make an LT1 intake a really good substitute, add material above the port so it can be port matched to a head with a bigger intake port.
Internally they are the late small trapezoidal port LT1 intake. Seems like most 95 and older stuff was more rectangular and larger.
The LT4 heads had big ports but the intake did not, this also means a little TIG work can make an LT1 intake a really good substitute, add material above the port so it can be port matched to a head with a bigger intake port.
Lloyd Elliot can add the extra aluminum to the LT1 intake ports to fit LT4 heads for around $150-200. Don't quote me on that price, but it's a lot cheaper than a LT4 intake.
Guys have run LT1 intakes unmodified on LT4 heads, the sealing margin is just narrow at top.
I have no direct experience with an lt4 intake but I do agree with you. I was more so posting that link for the pics.