Overview Reviews Product Description 351 Big Bore Head Gasket (Pair) Cylinder Head Gasket - 4.125 in Bore - 0.040 in Compression Thickness - Steel Core Laminate - Small Block Ford - Pair Product Videos Custom Field Product Reviews Write a Review Write a Review × FORD 351 Big Bore Head Gasket (Pair) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *