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Old 05-10-2016, 10:27 AM   #1
1972k5blazer
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2.5 in ram horn exhaust manifold identity ?

Could someone help ID these for me there 2.5 in ramhorns the casting number is 3797901 on both one had lh1 other has lh2 I know the generator brackets were removed from them the casting number comes back as 62-63 high hp vette but there's another number that looks like a date 5-13-91 on one 5-14-91 on the other. Am I missing something is the other number a date or something else ? Thanks just trying to get educated before I advertise them so there's no confusion. Thanks Name:  image.jpg
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Old 05-10-2016, 10:27 AM   #2
1972k5blazer
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Re: 2.5 in ram horn exhaust manifold identity ?

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Old 05-10-2016, 10:28 AM   #3
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Re: 2.5 in ram horn exhaust manifold identity ?

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Old 05-10-2016, 01:16 PM   #4
D.PASSMORE
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Re: 2.5 in ram horn exhaust manifold identity ?

You are correct in your analogy. They were still being offered in 1991 by GM. Nice set, they are getting harder to find and they are not cheap.
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Old 05-10-2016, 02:10 PM   #5
1972k5blazer
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Re: 2.5 in ram horn exhaust manifold identity ?

Thank you I was selling all my truck parts I had gathered and just wanted to make sure before I posted them so I and everyone was clear on what they were. Thanks Josh
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Old 05-10-2016, 05:13 PM   #6
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Re: 2.5 in ram horn exhaust manifold identity ?

Quote:
Originally Posted by D.PASSMORE View Post
You are correct in your analogy. They were still being offered in 1991 by GM. Nice set, they are getting harder to find and they are not cheap.
Were they offered as a over the counter part or were they on certain engines from the factory.
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Old 05-11-2016, 04:51 PM   #7
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Re: 2.5 in ram horn exhaust manifold identity ?

Over the counter, 1973 the new emission standards was the dagger to the classic horse power.
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