DIY: S55 Valve Cleaning Service Using CRC GDI Intake Valve & Turbo Cleaner - BMW M3 and BMW M4 Forum
CRC Industries' GDI IVD® Intake Valve & Turbo Cleaner to Debut at 2016 AAPEX and SEMA Shows Testing on turbocharged engines yields excellent results | Car Care News Service
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Let's see if I regret this...? CRC Intake Cleaner | BimmerFest BMW Forum
4 Pack CRC 05319 GDI IVD Intake Valve and Turbo Cleaner 11oz Can 78254053196 | eBay