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78 Air Intake Duct........

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Old 02-10-2012, 04:37 PM
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Jimmy W1
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Default 78 Air Intake Duct........

Were all of the Air Intake Ducts that sit on top of the radiator and go into the air cleaner the same from 1976 to 1982? What about the L 48 engines? That is what I have. Thanks for any help.
Old 02-10-2012, 05:01 PM
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corvette kitty
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Originally Posted by J Willis
Were all of the Air Intake Ducts that sit on top of the radiator and go into the air cleaner the same from 1976 to 1982? What about the L 48 engines? That is what I have. Thanks for any help.
No there are slight variations. 1976 to 1978 L 48, engines used a single duct, not sure of the part number but i believe they are the same. 1978 L 82 and 1979 L48 and L 82, used the dual duct system, the duct on the radiator is GM # 472711. 1980 and 1981 again all used the dual duct system but the duct over the radiator is slightly different, GM part # 14016116. 1982 was totally different with all having throttle body injection.
Old 02-10-2012, 05:08 PM
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Jimmy W1
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So, are the 76 thru 78 L48 single ducts the same? Will they interchange?
Old 02-10-2012, 05:08 PM
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Originally Posted by corvette kitty
No there are slight variations. 1976 to 1978 L 48, engines used a single duct, not sure of the part number but i believe they are the same. 1978 L 82 and 1979 L48 and L 82, used the dual duct system, the duct on the radiator is GM # 472711. 1980 and 1981 again all used the dual duct system but the duct over the radiator is slightly different, GM part # 14016116. 1982 was totally different with all having throttle body injection.
and have no reason not to...

BTW...is that Corvette Kitty from the Myrtle Beach Corvette Club who ran around in a yellow 1977?
Old 02-10-2012, 05:12 PM
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Originally Posted by J Willis
So, are the 76 thru 78 L48 single ducts the same? Will they interchange?
Yes, of all that i have seen i believe the single ducts are the same.
Old 02-10-2012, 05:14 PM
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Originally Posted by hunt4cleanair
and have no reason not to...

BTW...is that Corvette Kitty from the Myrtle Beach Corvette Club who ran around in a yellow 1977?
No, you got the wrong Kitty. Never been to Myrtle Beach.
Old 02-11-2012, 10:48 AM
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Easy Mike
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Originally Posted by J Willis
...What about the L 48 engines?...
76-79 L-48 ducts are the same.

Old 02-11-2012, 06:12 PM
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couperdecar
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Originally Posted by Easy Mike
76-79 L-48 ducts are the same.

Nope. 79 L-48 ducts have a duel air snorkel.
Old 02-12-2012, 10:41 AM
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Originally Posted by couperdecar
Nope. 79 L-48 ducts have a duel air snorkel.
Could be. I used my Parts and Illustration catalogue as my source. He's cool with a 78 L-48.

Old 02-12-2012, 03:30 PM
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KapsSA
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Originally Posted by couperdecar
79 L-48 ducts have a duel air snorkel.
Yep. Part of the 10 HP increase from 78 to 79 on the L48s.
Old 02-12-2012, 07:13 PM
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Originally Posted by KapsSA
Yep. Part of the 10 HP increase from 78 to 79 on the L48s.
I've read that the fresh air snorkel adds 5hp to a vehicle. Not really sure if one snorkel or two would make any difference. There must have been something else going on between 78 and 79. Cam maybe? Carb difference?
Old 02-12-2012, 07:41 PM
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"open flow" mufflers added 5 HP to both L82 and L48.
The added snorkle on the L48 added 5 more horse there

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