Performance air filters

Thinking what to do to get more cooler air into the intake. What would you guys recommend? Is it worth doing as i've read the intake system is pretty good as standard, the main restriction being the 90 degree on the back of the airbox? Any advice appreciated.

Have you closed off the warm air intake and removed hosing from the exhaust manifold. Ali

take a look on autospeed.com on the tech section.... there are some great articles about the various points of restriction in an inlet system and how to get around them...(i belive the work was carried out on a ford but the logic is applcable to all)... read this, assess your particular system then decide what you want to do... in general, you are looking to remove point of volumetric restriction and channels for hot air / system heating... The article shows some good ways this was achieved for litle of no cost.. Have fun...