Preheat oven to 350 degrees Farenheit

In large bowl, beat butter, brown sugar, corn syrup, and salt until all sugar has dissolved

Stir in pecans

In a separate bowl, combine cake mix, butter, water, sour cream, and eggs with a mixer or whisk until smooth

Prepare a 10-inch bundt pan with butter, oil, or spray

Pour sugar and pecan mixture into bundt pan

Pour cake batter over the pecans

Spread evenly

Bake approximately 45 minutes or until a toothpick inserted comes out clean

Remove from oven, and place on a rack to cool

Do not flp pan until cooled at least 10 minutes

Place a serving plate or cutting board on top of bundt pan, and flip pan over - allowing cake to slide out onto the plate or board