The exhaust ports exit in the stock location and feature a dual-bolt pattern capable of accepting either stock-type Ford manifolds/headers or ... the world the first cast-iron, high-performance ...

In truth, long-tube headers can often flow less than ... Rather than the more common cast-iron variety, the fuelie Ford received tubular manifolds, albeit small-diameter units designed more ...

mid-length headers, and log-style cast-iron headers – all of which are supplied by Holley Performance. The engine being used to conduct this experiment is a 6.0L BluePrint small block crate engine.