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0405htp Engine 06 Z

The valve seats obviously need changing to accommodate the mammoth 2.08-inch intake and 1.60 exhaust valve combination. This is the old one, which will be replaced with a new nickel chrome piece.
MTI Stage III Heads Install - Tri-Power 427 -- Part II

 The valve seats obviously need changing to accommodate the mammoth 2.08-inch intake and 1.60 exhaust valve combination. This is the old one, which will be replaced with a new nickel chrome piece.  View Related Article

 

 

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