SEMA 2012: Ferrea Has Titanium/SS Valves for High-flow LSX-DR Heads
 

The LSX-DR is the highest-flowing cylinder head available for the LS engine, and Ferrea Racing Components helps drag racers take advantage of that airflow with a titanium/stainless-steel valve package. Ferrea is touting its line of tool-steel retainers that are almost as light as titanium but cost less.

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