PROMAXX Performance Series One Small Block Ford Cylinder Heads

PROMAXX Performance Series One small block Ford cylinder heads are affordable, high-flow as-cast versions of fully CNC-ported heads. These heads feature ultra-smooth 356 T-6 aluminum casting, 5-angle valve jobs, precision CNC machining, and diamond-honed bronze guides. Put track-tested performance under your hood with a formidable pair of professionally assembled Series One small block Ford cylinder heads. They are available assembled or bare.

Features, items, and specs:

* 175cc as-cast intake runners
* Multiple spring options
* Assembled heads include 21-4N one-piece swirl-polished back-cut stainless steel valves, 3/8 in. studs, and adjustable guide plates
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