Proflow billet aluminium filler necks allow you to fill and install a coolant cap where the thermostat housing would usually be located on a SB or BB Chevrolet.

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Proflow Billet Aluminium Radiator Filler Neck Weld On, 32mm, Suit Japanese Size Radiator Cap, Each

Proflow Billet Aluminium Radiator Filler Neck Weld On, 32mm, Suit Japanese Size Radiator Cap, Each

$39.50

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