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We also offer ARP black oxide bolt kits for our BILLET ALUMINUM EXTERNAL OIL PUMPS. These are for use ONLY with our Billet Aluminum External Oil Pumps, they will not work with regular Melling High Volume oil pumps, or with factory pumps. Because of the thickness of the aluminum plate on our billet pumps, they require a special length of bolt. We've researched the exact size needed, and sourced them in ARP's black oxide steel alloy, which are rated at a minimum 170,000 PSI... even stronger than a grade 8 bolt! They also feature a reduced diameter 3/8" drive 12pt head. Kit includes 4 bolts with matching black oxide washers. Small details like this can really make a car "show quality."
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