| k&n filter won't give u gains significant as ecu tune, pulley upgrade, headers, etc... but there is very small gain...
someone on the other forum ran a dyno on stock filter vs k&n filter and said there was a slight gain with k&n (not W163 tho)...
on my 203 and 163, i do notice k&n filters sucking in lil' more air...
at least u 'feel' like u r gaining....
even if it's 0.5% gain, gain is gain... and i'm happy...
however, if u r looking to really gain performance out of K&N, then u should get bigger custom airbox or do custom cold air intake...
__________________  2003 C240 heavily modded 2004 E55 stock 2004 ML350 sold |