FS: 1966 Exhaust Manifolds
Thread Starter
Drifting
Joined: Aug 2010
Posts: 1,800
Likes: 304
From: Charlotte Area North Carolina
1966 Exhaust Manifolds
Thank you Gary, let me add some more details. The motor in my 1966 is not the original motor. These are not NCRS correct exhaust manifolds for a SBC 1966 Corvette. I was told the motor was replaced in 1969 after the original motor broke. The builder gave the owner two options: sleeve the #6 cylinder or replace the block. The owner at the time choose to replace the block and the builder used a L-79 block from a 1969 Impala. My car does not have power steering, power brakes, or AC. Perhaps that is where these exhaust manifolds come from (Impala). I'm not sure so please do your own research. All I can tell you is that I removed these exhaust manifolds and installed long tube Hooker Headers and side pipes about 2010 and they have been in the attic ever since.
Selling the exhaust manifolds off of my 1966, L-79 327 c.i. / 350 Hp motor. Comes with all of the hardware, heat riser, gaskets, and donut gaskets. $50 obo plus shipping, USA only. PayPal F&F.
LH
LH
LH
LH
LH
RH front
RH back
RH
RH
RH
Last edited by KS69Coupe; May 25, 2026 at 12:44 AM. Reason: more infomation
Instructor
Joined: Feb 2011
Posts: 203
Likes: 36
From: CA
To keep a potential buyer from being disappointed, I’m not certain what manifolds you have there, but ‘66 and ‘67 SB (300 HP and L79) without A.I.R. used GM #3747042 RH and GM #3846559 LH.
Gary
PS I think GM 3846563 was used in ‘64 and ‘65 on small blocks which had the 2.5” outlets. ‘66 and ‘67 small blocks has 2.0” outlets.
Gary
PS I think GM 3846563 was used in ‘64 and ‘65 on small blocks which had the 2.5” outlets. ‘66 and ‘67 small blocks has 2.0” outlets.
Last edited by GBeaupre; May 25, 2026 at 01:37 PM. Reason: Added PS
