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Review on ACDelco AFM4 Professional Restriction Indicator by Justin Peck

Revainrating 5 out of 5

Useful as an addition to a vehicle that was not supplied or as a replacement.

The only RIGHT way to check for clogged air filters due to dirt or undersize. These devices are sold under many brand names.

Pros
  • Guaranteed High Quality and Reliability
Cons
  • Some Problems