These head bolts are the best out there , the washers keep the bolt hole opening from cracking and chipping away under the stress of the bolt head . Clean up the bolt holes in your block by running a bottoming tap down each hole - follow up with brake clean and a blast of air . Use the lube supplied on the threads and on the bottom lip of the bolt head. torque the bolts in progressive increments from the center -outward . This procedure and the ARP bolts will give you years of trouble free sealing issues.
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ARP head bolts are the on head bolts to buy. Don't buy the 20 dollar cheeper knock offs sold on eBay. I learned that the hard way after I broke the number 1 bolt in my block putting 70 foot pounds on it after 50-60 3 step increments. Do yourself a favor buy ARP took me 2 hours to get the broken bolt out of my block and 75 bucks on top of the 55 I spent on the crap bolts. ARP are the best.
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Have used many ARP products and have always been satisfied with the excellent results from same. Have never found any problems from any other users.
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This product is of high quality and workmanship.
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Other than the box looking old,worn out and opened many times,like USA made products
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