I didn't really notice any increase noise from the intake side. I switched out my Borla setup for a full Specialty Z exhaust which is a bit louder so that is where I noticed the increase in noise. With that said, the Selin dual setup is one of the best plug and play products to hit the market. I wouldn't even be worried about any slight increase in auditable noise versus the single POP because nobody externally will even know based on external sound (i.e. sleeper status preserved).