Overview Reviews Product Description 400 Chevy Head Gasket Cast or Aluminum Heads Cylinder Head Gasket - 4.200 in Bore - 0.041 in Compression Thickness - Steel Core Laminate - Small Block Chevy - Each Product Videos Custom Field Product Reviews Write a Review Write a Review × FEL-PRO 400 Chevy Head Gasket Cast or Aluminum Heads Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *