| Precision Race Components is proud to introduce our CNC ported 5.3L L83 cylinder heads! The PRC ported gen 5 L83 cylinder heads are an excellent upgrade for customers looking for more power than what the factory castings offer. Bolt on these CNC ported L83 heads & gain 25+hp depending on milling! Pair our PRC ported L83 cylinder heads up with a TSP L83 camshaft that was designed on our SuperFlow engine dyno! Ask your sales professional how you can gain 100+ HP today!
This kit includes the following:
CNC Ported GM Castings
CNC Valve Job
CNC Custom Milling To Your Specs
TSP .660" Dual Spring Kit Available with PAC Racing Valve Springs
With over 360 CFM of airflow, these CNC Ported heads offer unmatched power & flow gains for your L83 engine! If you already have a pair of stock castings & want to do a CNC head exchange, give us a call! We typically stock ported L83 heads for exchange! | 
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