Not sure on 'm' numbers but 2x 17mm head bolts, think that's 12mm thread ?!? Lol bout 50mm long and use the original ones off the studs on the manifold. Hope this helps
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Red Escort 1.6LX Then - Red Escort 1.4 Then - Silver Fiesta ST 170BHP Then - White Fiesta ST MR200+ Now - Mitsubishi Evo IV Forged 2.3 500BHP and Mondeo Mk3 2.0TDCI