SE851 x 1 Set. This is our very popular core plug strap kit, which comes with 7 new STAINLESS STEEL 'Welch Washers' (the name for this dish design), 7 x STAINLESS STEEL bracing straps, a HSS drill to bore the holes and a matching high quality tap for threading the holes to suit the 14 STAINLESS STEEL cap screws provided. The kit uses properly race developed, straps that curve inwards, then are secured to the block to ensure the large (C315) core plug is firmly braced and cannot blow out of the block during high performance use.

NOTE : This of course negates the freeze protection of the core plugs, but racing mods always involve trade-offs!