what filter gives best the power increse iyo, I read that pipercross worked with lotus (304R) to make the viper and gives 18 plus bhp but £200.00 for an filter.does anyone no more is it worth this amout of cash?

 

to be honest you only really get an increase if you tend to do other modifications along with it ...
have used piper and k&n they do make some difference on a standard engine but i always find it hard to beleive the claims these companies make...

 

leave the norm one on there m8

 

std i rarther walk

 

 

Stick a K&N on it mate.

Doubt you'll notice much if any difference but it'll sound better

 

Got a pipercross one one mine and had no probs with it

 

just replace your original with a K&N panelfilter

and drill your airbox