Cook the pasta according to the package instructions. Drain, rinse with cold water, and set aside.
Roast the corn on the cob in a skillet or on the grill, turning until charred and tender. Remove the kernels and set aside.
In a bowl, whisk together the mayo, sour cream, lime juice, chili powder, garlic powder, and salt and pepper.
In a large mixing bowl, combine the cooked pasta, roasted corn, and cilantro.
Pour the dressing over the pasta mixture and stir to combine.
Add crumbled cotija cheese and gently mix it in.
Refrigerate for at least 30 minutes to allow the flavors to meld together. Serve with extra lime wedges and cilantro, if desired. Enjoy!