I'm sure that I'm not the only one that has installed an aftermarket intake but for those who have..did you leave those insert that looks like it would generate a "whirlwind" in the intake? Roush recommends to remove them. Wondering if there is an advantage to leaving them in?

 

I know the response is pretty late... but I took mine out. I think they are just there to prevent noise and make the "whistle" quieter. I don't think they serve any kind of mechanical advantage or other advantage.

 

If you leave the insert in you'll need to have a tune. I installed a Roush CAI on a mustang 10 years ago and that's what the instruction sheet said.

 

 

The inserts are called Silencer Rings and serve no real purpose other than to help reduce engine & turbo noise.

 

 

Take them both OUT

 

LOL, couple days into owning this truck new, I took out the swirly thingies. Noticed no difference in anything, including turbo sound, which is what I wanted. A few weeks ago, out of boredom, I stuck them back in so I didn't lose them. Still, no difference I could perceive in sound, mileage, anything.

 

I think we talked about this before lol---but when I took my Swirlys out----I got a noticeably more swirly sound from my turbos--Im sure its all in the ears