Set of AMC Head 50 by 40 Valves, Dual High-Rev, Stage 2 P&P Size:103-105 Stage 2 Back Spacing: 4-3/8"

Back Spacing: 4-3/8"

240°/240° Duration

AA air cleaners feature stamped steel bodies

Non-asbestos brake shoe

Set of AMC Head 50 by 40 Valves, Dual High-Rev, Stage 2 P&P Size:103-105 Stage 2 Back Spacing: 4-3/8"This is a brand new (Set of 2) Stage 2 Port and Polished High Performance Cylinder Heads for a Porsche 9142. 0L or Type 4 Bus Porsche 1. 8L On the Porsche 2. 0LThe Stock Spark plug holes will be welded up and relocated to the 914 2. 0L position for that application. A 4 stud intake manifold will be required. Heads comes with stainless steel 50mm intake and a stainless steel 40mm exhaust valves, with harden keepers, chromoly retainers, and dual high