AFR 12-Degree Cylinder Heads -CNC Ported - LS3 35BONUS The thread connection is 1/2

The thread connection is 1/2 in

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AFR 12-Degree Cylinder Heads -CNC Ported - LS3 35BONUS The thread connection is 1/2Product Description: Cylinder Head LS3 Mongoose Assembled 2. 165 1. 600 in Valves 260 cc Intake 69 cc Chamber 1. 270 in Springs Aluminum GM LS Series Pair Advanced FLOW engineering (aFe Power) is a premier designer and manufacturer of automotive performance upgrade systems and components. Current product lines include cold air intake systems, high performance direct fit and racing air filters, exhaust systems, intercoolers, turbochargers, electronic