Flo-Tek offers one of the most affordable ways to add a set of aluminum cylinder heads to your Big Block Chevy. These cylinder heads have a 360cc intake runner and 128cc exhaust runner, so they are great for street and off-road application were you would like to have good low in power. The 133cc cumbustion chamber, 2.250 inch intake and 1.880 inch exhaust valves make them a great cylinder head for most stock applications. The Hi performance springs can be used on cams up to .800 inches of lift. These Flo-Tek cylinder heads even come with a five angle valve job, you don't see that on most more expensive cylider heads. These heads are complete and ready to run. Sold individually.