Review on Bosch Automotive 6051C HEPA Cabin Air Filter - Fits 2003-2015 Cadillac CTS, 2004-2007 & 2009 Cadillac SRX, 2007-2011 Cadillac STS by Patrick Stephani

Although this is a great looking filter, it restricts your air conditioning at level 1 with very little air movement. At maximum speed, the fan motor becomes very loud due to the limitation. Tested by bosch HEPA on 2010 corolla and 2008 cts with same results. For this reason alone, the product received 4 stars. The product itself is very good but due to the lack of airflow and noise I have removed the product from both machines.