Seller notes

FIRE RING HEAD GASKET KIT, +.010 for CUMMINS 4BT Requires grooves cut in to head or block surface and must use head studs. Full machine shop services available if needed. +.010 gasket thickness, choice of ring size 4.500, 4.550, 4.560 or custom. Our standard ring size is 4.550 X .105. Leave a note in the comments on the size of the rings. Call the shop with any questions. We can arrange freight shipment if you need to send us the head....

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