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No, 350 headers will not fit directly on an Oldsmobile 403 engine. While both engines are part of the GM family, the Oldsmobile 403 has different exhaust port configurations and dimensions compared to the Chevrolet 350. To use 350 headers, you would need specific adapter plates or custom modifications to ensure a proper fit.
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Related Questions
Does anyone make headers for a Oldsmobile 403 that will fit in a 1966 Oldsmobile cutlass?
Yes. 403 is a small block with identical exhaust ports as a 350 and 330.
Will Chevy 350 headers fit Oldsmobile 350 engine?
No, Not even close.
Will a Chevy 350 cam fit in an oldsmobile 403 block?
NO. Not even close.
What transmissions fit a Oldsmobile 403?
TH-350 is the automatic that would. Hope this helps.
Will 350 exhaust headers fit on a 403 olds?
There were both small blocks and I'm going to say, yes.
Will headers for a 403 Olds fit on a 455 Olds?
No, the blocks are different.
Will headers from a 305 fit a 350?
yes
Will headers from a Chevy 350 fit on a 4.6 ford?
no
Will Oldsmobile 455 headers fit on a Buick 455?
No. they are different head designs.
Does 350 motor fit a cheverlot C10?
Yes if its stock no headers?
Will 350 headers fit your 305?
YES. They will bolt right up.
Will headers from a Chevy 454 fit on a Chevy 350?
NO. Not even close.
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