Exhaust manifolds off G 455 heads
June 12th, 2021, 01:30 PM
#1
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Exhaust manifolds front drum spindles LH/RH added more parts
I got em you need em $40+shipping. Pick up locally Rosehill Kansas. Added front drum spindle assembly LH/RH $50 each.
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Last edited by wr1970; June 23rd, 2021 at 03:39 PM.
June 15th, 2021, 10:49 AM
#3
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Location: Northern VA
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Actually, not entirely. 411961 was primarily a small block manifold, but Olds did use it on 1975-76 455s with single exhaust. There's a reason why the 455 in those years was rated at a whopping 190 HP. 
398704 was used on 1968-73 350 motors only, however. In neither case did the factory ever bolt them to G heads. I'm guessing that G-headed 455 was an engine swap and whoever did the swap reused the 350 manifolds.
398704 was used on 1968-73 350 motors only, however. In neither case did the factory ever bolt them to G heads. I'm guessing that G-headed 455 was an engine swap and whoever did the swap reused the 350 manifolds.
June 15th, 2021, 06:01 PM
#4
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Actually, not entirely. 411961 was primarily a small block manifold, but Olds did use it on 1975-76 455s with single exhaust. There's a reason why the 455 in those years was rated at a whopping 190 HP.
398704 was used on 1968-73 350 motors only, however. In neither case did the factory ever bolt them to G heads. I'm guessing that G-headed 455 was an engine swap and whoever did the swap reused the 350 manifolds.
398704 was used on 1968-73 350 motors only, however. In neither case did the factory ever bolt them to G heads. I'm guessing that G-headed 455 was an engine swap and whoever did the swap reused the 350 manifolds.
Last edited by wr1970; June 23rd, 2021 at 06:33 AM.
June 25th, 2021, 10:10 AM
#8
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Location: Northern VA
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