Hi everyone !

I drive 2010 RRS supercharged. Car produces 570 hp and 733 NM. (only remap and startech exhaust without catalyst). So now I planning to install smaller supercharged pulley and I have few questions. As I understood after installation of smaller pulley the supercharged can be overheated and I need to install 010 bosch pump as well. is it true? Tell me also please , which pulley is better aluminum or steel one?
My friend on RRS SVR installed NGK Racing competition spark plugs (stock glow number is 7 and NGK racing competition has 9 glow number) What do you think , will it help? Unfortunately mina gallery do not produce the tube set for RRS , but I will do custom one. So how else I can reduce the overall temperature of intake ?

PS Sorry for my english in advance. Im from Russia .