Description
Holley 300-277 intake manifold for small block ford 289-347ci optimized with wilson manifolds intermediate porting service.
Intermediate porting service includes: porting the plenum of the intake manifold all the way through the runners. We will adjust the divider walls, taper, angles, textures, etc to substantially enhance distribution and pick up horsepower. The service also includes a gasket match to customers specification.
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