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LS1 PRO-1 CYLINDER HEAD225CC A/P 62CC ASSM. This headis the assembled 225 62cc Dart ls1 Head Dart's LS1 Cylinder Heads are cast from the same virgin 355-T6 aircraft alloy that is used in Dart Pro-Stock heads. These LS style heads are available with high flowing as-cast ports. Standard valve angle and spacing is retained for bolt-on compatability. As cast heads are bowl blended on 5-axis machining centers. Manganese bronze valve guides are used for long life, and hardened valve seats provide durability with unleaded fuels. This head comes assembled with 2.05/1.60 valves and a beehive style valve spring |
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