We're back with Newcomer Racing (http://www.newcomerracing.com)as they slam FIVE different Jeep cylinder heads across the dyno to see what works best. We've got a wide variety, from stock ports, to a fully hand-ported Edelbrock Performer cylinder head. This is the second of a two-part dyno testing series. Check out the first video where we looked at whether roller rockers help make power here:    • Do Roller Rockers Make Power? (Dyno T...  

Also, you can check out our complete build of Newcomer Racing's budget stroker Jeep engine here:    • Big Power Jeep Straight Six Stroker B...