Seller notes

Manganese bronze valve guides extend cylinder head life, The multi-angle intake seats and radiused exhaust seats dramatically increase air/fuel flow, Heads are cast from A356-T6 aluminum and designed to work with most off the shelf components, Standard valve angle and spacing are retained to allow use of off the shelf pistons and valve train components, They are assembled with 1.437 diameter dual valve springs for Hydraulic Roller or Solid Flat Tappet Cam 0.620" Dart 127322 SHP 200CC Assembled E...

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