Sunnen www.sunnen.com +1 314 781 2100 7910 Manchester Road, St. Louis, CO, 63143, USA Sunnen www.sunnen.com +1 314 781 2100 7910 Manchester Road, St. Louis, CO, 63143, USA Sunnen Products Company has been a global leader in the manufacturing and distribution of bore sizing and finishing equipment, engine rebuilding equipment, and tooling and abrasives since 1924. Contact Us Facebook page Twitter Linked In YouTube Contact Us Facebook page Twitter Linked In YouTube Latest News Honing Expertise Gives Elite Sports the Winning Finish New 60-grit honing stones provide low-cost, aluminum-oxide alternative to superabrasives for heavy stock removal In-house honing boosts profitability and part quality