I picked one of these up with the hopes that it would be easier to install and remove than the RS4 accordion hose that I had been using for a while. It was a touch easier to connect to the RS4 y-pipe.
The other thought with using this silicone MAF hose was that the smoother interior surface would present less resistance to airflow. 034 states that it “Features a larger inside diameter and smoother surface for better flow, and stiffer construction to prevent collapsing.”
I wanted to put it to the test against the RS4 accordion hose and see how they compared.
To perform the comparison I attached one side of each hose to an 85mm EPL MAF housing with the Hitachi MAF sensor installed, and attached the other end to an RS4 Y-pipe.
034 Silicone MAF Hose shown above and RS4 Accordion MAF Hose shown below.
Below is a side by side comparison of the interior of each MAF hose.
Each hose was placed on the flow bench and run up to a test depression of 10″ of H2O. The results are shown on the chart below:
The RS4 accordion flowed 490 CFM and the 034 Silicone MAF Hose flowed 495 CFM.
As far as the performance difference goes there is not much between the OEM RS4 accordion hose and the 034 Silicone MAF Hose, only 1% that I measured, which is probably within the margin or error for this test setup.
I still like the 034 Silicone MAF Hose. It’s nice quality, fits well, and performs as well as the main alternative.