Please check the size of your bolt from your engine before ordering as there are some variations between Black Top, Silver Top and ST170 engines.9mm x 37.5mm bolts which is part no (Z044).
8mm x 44mm long.
Good insurance against rod failure.
Ideal for road and race engines.
9mm x 37.5mm bolts also available (Z044)
Integral - .70 Master Cylinder (BC001I.70)
Zetec Flywheel Bolts - ARP (Z017-ARP) 
