What is the diameter to the piping where the filter goes? Got a good deal at a local auto parts dealer that was going out of business, had the kit for $50! That's a steal!

 

so u have the kit, the intake kit and not just the filter kit right...............? then measure it????

 

I have the whole kit with filter I just don't have it in hand yet. They have to get it from the warehouse and it will be in Friday. I wanna replace the filter with an AEM dryflow filter but I wanna get the correct size.

 

It's 3.5" for the GS4

 

Thanks a lot!