Muema had 105 yards on 14 attempts, and Katz was 16 of 22 passing for 181 yards for the Aztecs (4-3, 2-1 Mountain West), who were not penalized in a game for the first time since 1973.
Conner Smith was 18 of 22 for 165 yards and an interception for the Rams (1-6, 0-3).
SDSU converted all three of Colorado State's turnovers into touchdowns, and scored another TD after the Rams gave the ball up on downs.
On the first play from scrimmage in the second half, Marquise Law fumbled for Colorado State, and Jake Fely recovered for the Aztecs. Two plays later, Katz scrambled to the end zone from 11 yards out to give SDSU a 24-7 lead.
Largent had two interceptions and Fely two sacks for the Aztecs, who have won seven of the last eight meetings between the teams.
After winning at least 11 games in five of the last six seasons, Michigan State is good for at least nine wins in 2016.
It's pretty early to start predicting the Week 1 results, but the Big 12 could have a strong showing in Week 1, even if Texas struggles vs. Notre Dame.
Satellite camps received a lot of attention, but did they provide any value, to schools or prospects? RecruitingNation discusses the pros and cons.
Alabama will face some tough tests on the road, starting with an early-season matchup against Ole Miss.
Ausbon is a top-20 receiver in the Class of 2017 who brings size and speed to the Tigers' already loaded class.
With the potential for disciplinary action hanging over many starters in the SEC, who plays in Week 1 is still very much up in the air.