Components Carburation. Rocker Assembly. Valves. Components Viton valve stem seals £12.50 BK450 head gasket £15.00 Sold out Double valve spring set - Road £33.33 Double valve spring set - Race £50.00 Billet steel pushrods - 1275 £83.33 Sold out Billet steel pushrods - 998 £83.33 Sold out Pushrod set from £16.67 Water temperature sensor £4.17 Small bore composite head gasket £13.50 Exhaust manifold gasket £1.25 Sold out Exhaust manifold gasket - large bore £2.08