Cook pasta according to package directions until al dente. Toss with olive oil, salt, and pepper and set aside to cool to room temperature.
On a lined baking tray, toss corn in olive oil, salt, and pepper. Spread out to an even layer and broil 5-10 minutes or until seared and slightly crunchy.
Add pasta, corn, cotija, and cilantro to a large bowl. Set aside.
In a medium bowl combine sour cream, mayo, garlic powder, chili powder, cayenne pepper, lime zest and juice, and a couple of large pinches of salt and pepper.
Pour most of the dressing over the pasta and toss until everything is well coated.
Transfer Mexican Street Corn Pasta Salad to a serving platter, drizzle with remaining dressing and garnish Mexican Street Corn Pasta Salad with crumbled cotija and fresh chopped cilantro.