i was wondering is it normal for it to make a whistling sound when i rev it up!! i dont have the air bypass valve installed on it, it is just straight tube let me know please im alittle concerned

 

Yes, that is normal. My dad's Injen air intake does the same on his 350Z. Most cold air intakes are just like this. How do you like the intake so far? I almost bought that, but I opted for the JWT popcharger with a Z-tube.

John

 

Wow, how many people are going to ask the same question week after week???

 

once it hits the high rpms and the engine opens up it sounds like a monster!!! i think i made a great choice ,it looks clean aswell