Does this Intake Valve Cleaner Really Work? Proof, Before & After / Clean carbon from intake valves - YouTube
CRC 32548-AA Valve Cleaner
best intake valve cleaner vs direct injection! (GDI) - YouTube
DIY: S55 Valve Cleaning Service Using CRC GDI Intake Valve & Turbo Cleaner - BMW M3 and BMW M4 Forum
Pic) I'm going to be using the CRC intake valve cleaner spray and I'm wondering if I can remove the MAF sensor and squirt it through the opening left there? Or, do