The 2nd Generation D100 debuted midway through 1965, now sporting two headlights instead of four. Three new engines were added as options including a 440 cubic inch big block during the 2nd Generation's production run. In 1968, a the D100 received a midlife facelift and new trim levels including the Adventurer and "The Dude" trims.

Hays Street 650 single disc kits are designed handle highly modified naturally aspirated engines up to 650 horsepower. Designed as a true street/strip clutch for spirited high performance driving or frequent track use.