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The reason for spread port heads is to achieve additional cooling in the center of the head where the heat concentration is greatest
and the car has factory settings
The insulator will limit the transfer of heat from the block into the fuel pump
1979-1981 GMC G2500Fits 1968-1981 GM TH350 automatic transmissions
Ferrea 6000 Series Valve Stainless Intake 2.300" Head 11/32" Valve Stem 5.471" Long - BB Chevy 2010281 The reason for spread portProduct Description: Intake Valve 6000 Series 2. 300 in Head 11 32 in Valve Stem 5. 471 in Long Stainless Big Block Chevy Sold Individually Ferrea Racing Components are engineered to excellence! For decades, Ferrea Racing Components has been manufacturing hard core racing components for various types of engines in a wide range of categories worldwide. Ferrea uses the latest technological advances gained through the development of engine valve programs
US$ 3241.80
US$ 60.30
US$ 3442.05
