1990 Toyota Corolla Spark Plugs

Hi guys,

I'm currently using Bosch Super Plus Spark Plugs and I think the heat range is +6, the gaps are factory set, I think it's 0.04" and I will be replacing my timing belt.

Is the spark plug I'm using appropriate for my engine? And any tips on the timing belt please.

I drive rather aggressively when given the chance. I shift up only when I hit 3000rpm or above, most of the times I'd rev up to 4000rpm when shifting from 3rd to 4th then to 5th gear. I got used to this since I learned how to drive. I'd like to tune my engine performance for my driving.

Thanks and more power.
Jack