Like Les , I cannot recommend going back to the original canister air filter system.
My results were not as spectacular as his, but the best I could do with the original system was 148 bhp , which rose to 186 bhp with the JR cone filter and Mark Adams chip.
I even tried replacing the filter element with a K&N part , but the difference was only minimal. The engine needs to breathe, what is OK for a low-revving 4x4 weighing upwards of 2000 kilos is not really suitable for a sports car weighing half that.
I am also not a big fan of the foam core type units (but the racers like them) , mine was a simple conversion using the existing brackets and rubber mounting of the cylinder. You need to keep the element clean, and re-oiled , so i just build that into my annual maintenance schedule. I have had mine for almost 18 years now and it still looks a fitting addition to the engine bay. Yes it would be better to ensure that it only took in cold air, but that involves a lot more thought, more truncking and something else filling an already crowded under bonnet area.
Last edited by MOG 615; 19/07/20 04:18 PM.