Cook pasta per instructions on package. Drain. Toss with olive oil, salt & pepper. Set a side to cool to room temperature or place in refrigerator to cool faster.
In large bowl mix sour cream, mayonaise, lime zest and juice, garlic powder, chili powder, and cayenne pepper. Salt & pepper to taste.
Add cooled pasta, corn, cheese, and cilantro and mix well.
Place in a serving bowl and top with extra cheese, chili powder, and cilantro.