Is the stock inlet tube a restriction?

[VADER*]

I still have the stock inlet with the ribs on it, but I have a K&N ram air type filter on it. Is that tube actually a restriction or more cosmetic to replace?
Thanks.

 

[mi_l123]

I think where the most HP is gained is from the filter itself. A lot of ppl have stock inlet tube with k&n filter.

 

[MoKo_03SVT]

make sure you have the "snorkel" removed from the airbox, out of the fender well for the most benefit.

 

[metaman]

I don't think that it would become a restriction until you get into crazy airflow like a high boost 3.4 whipple.

 

[Yellow03SVT]

My local dyno shop says they have dynoed both ways (CAI and filter/adapter w/stock duct) and said there was no noticeable improvement with an aftermarket CAI. So you can just by the adapter and filter and save some $$$ for your next mod!

 

[03Snake04]

many twin screw owners still running the stock inlet tube making huge power .. i think its mostly cosmetic

 

[Jomo1994z71]

I disagree. The JLT RAI is what I did my research on and was very happy from switch from the K&N. It helped my pullied car go from K&N, stock exhaust to catback and JLT, gained about 25HP