CRC Industries - CRC GDI Intake Valve Cleaner (#05319) No more engine tear-down required to clean intake valves on GDI engines. Read more and get a $5 rebate here: http://crcintakevalvecleaner.com/ | Facebook
CRC GDI Intake Valve Cleaner | 2004 to 2020 Mazda 3 Forum and Mazdaspeed 3 Forums
4 Pack CRC 05319 GDI IVD Intake Valve and Turbo Cleaner 11oz Can | eBay
Does this Intake Valve Cleaner Really Work? Proof, Before & After / Clean carbon from intake valves