Precision Race Components 5.3L Stage 1.5 Cylinder Heads Fully CNC Ported
10-10-2006, 08:34 PM
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I bought a set last late last year. I took the time and did some additional work on them before I installed them. I was very pleased with the results. Don't know how they would have done straight out of the box.
10-11-2006, 09:05 AM
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The newest version of the 5.3l program is smaller & flows more air than the previous versions! We've been working months on this latest 5.3l program & should be ready to ship them pretty soon. Look for dyno testing to be posted on the newest ls6 programs THIS WEEK!!!
10-11-2006, 04:45 PM
#5
Originally Posted by Zach@Texas-Speed
The newest version of the 5.3l program is smaller & flows more air than the previous versions! We've been working months on this latest 5.3l program & should be ready to ship them pretty soon. Look for dyno testing to be posted on the newest ls6 programs THIS WEEK!!!
