Cook the pasta according to package instructions, drain, and set aside.
Whisk together mayonnaise, sour cream, lime juice, chili powder, salt, and pepper in a bowl.
Combine pasta, corn, red bell pepper, red onion, and jalapeno in a mixing bowl. Pour dressing over the ingredients and toss gently.
Add cilantro, toss again, adjust salt and pepper seasoning.
Refrigerate for at least 30 minutes before serving.
Notes
For extra flavor, let the salad marinate in the refrigerator for a few hours before serving. Adjust the amount of chili powder to your desired level of spiciness.