The 4 #RS25 engines that will roar to life during today’s #SLS hotfire all have some flight heritage with Shuttle:

• E2045 - 12 (!) flights, including STS-95
• E2056 - 4 flights, including STS-114
• E2058 - 6 flights, including STS-133
• E2060 - 3 flights, including STS-135

— Tyler Gray (@TylerG1998) January 16, 2021