About Jiffypartz (Newmarket Auto Parts Group) Jiffypartz, operating as Newmarket Auto Parts Group, is a family-owned and operated distributor of aftermarket automotive parts serving Central Ontario. With two locations—200 Mulock Drive, Newmarket, ON (905-235-1115) and 422 Dunlop Street West, Barrie, ON (705-725-1114)—Jiffypartz supplies brake pads, brake rotors, control arms, engine parts, body parts, and a full range of car parts to retail customers, licensed mechanic shops, and dealerships across Newmarket, Aurora, Stouffville, East... read full review »