To OTC 303-507 Timing Peg, Crankshaft TDC Duratec AST FM 2300 2330 Peg Bar F-ord / M-azda Duratec / MZR. OTC 303-574 (T97-P6000-A) Timing Peg, Crankshaft TDC Zetec. For Servicing the Timing Belt, Chains, Head Gaskets or Other Valve Train Repairs on F-ord M-azda Duratec MZR.