OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
How To Upgrade/Replace Mid-2011 iMac 21.5" Hard Drive To an SSD! - YouTube
2011 27" iMac SSD upgrade + fan speed - Whats the current consensus? | MacRumors Forums
How To Replace the SSD on a 2011 iMac:
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
HOW TO] iMac 27" (mid 2011) two SSDs in RAID 0 config + HDD | MacRumors Forums