Dana Perfect Circle piston rings. Sixteen straight wins at the Indianapolis 500.

16 straight wins for Perfect Circle piston rings at the Indianapolis "500"

No other piston rings made match the win record of Perfect Circle at Indianapolis. In 31 of the last 37 years, Perfect Circle helped give "500" winners the extra margin of full power performance it takes to enter victory lane. And the the PC piston rings used by these champions were not specially made for racing. They were standard sets—the same kind you can install! What’s more, every qualifier in last year’s "500" also used Perfect Circle Valve Seals. So take a tip from the experts. When you re-ring, insist on Perfect Circle.

Perfect Circle
Dana Parts Company • Dana Corporation

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