Bring a large pot of salted water to a boil. Add pasta and cook according to package instructions until al dente, about 8-10 minutes. Drain and rinse under cold water.

In a medium bowl, mix mayonnaise, sour cream, lime juice, chili powder, salt, and pepper until smooth.

In a large bowl, combine cooled pasta, street corn, red bell pepper, red onion, and cilantro. Toss gently.

Pour dressing over the salad and fold gently until well coated.

Cover and refrigerate for at least 30 minutes before serving.