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1977 -1981 Oldsmobile small block 307, 330, 350,and 403 high performance exhaust manifolds.
Part Number: 3992NR
In Stock - Item usually ships within 24 to 48 hours
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1977 -1981 Oldsmobile small block 307, 330, 350,and 403 high performance exhaust manifolds.
The high performance exhaust manifold that GM never produced. This is the high performance solution instead of headers for Oldsmobile small block V8 engines.These manifolds were conformed from the 1970 455 W30 manifold and custom fit to the small block for all proper clearances. They will fit 1964 - 1988 small block Oldsmobile 307, 330, 350, 403. Will fit all GM A body cars, G body cars, F body Trans Am with a 403 and 1971 and newer B and C body cars.
Features:
Large 2 1/4" outlet on the driver side manifold (original stock manifold is 2")
No crossover pipe hole to plug on the passenger side
Divided center port design
Larger design for better air flow
Direct bolt on with no modifications needed
