First thing to do to get more HP to 99 Boxster?

[mikefocke]

Your options. Almost all are $$$.

Maybe if you posted a description of when and why you wanted the increased performance we could better suggest a route to that end.

[GaryMulcahey]

I raced motorcycles before I bought my bone base 99 986. The bike I raced for the last 5 years was a TZ250 (2 stroke Gp bike). Every 600cc and higher bike today can walk all over it in straight line speed. But nothing can match it in corner speed and handling. Not a fast bike but you can ride it very fast. That is what the 2.5 is like to me. Not a fast car but you can drive it fast.

[jb92563]

If you enjoy the tinkering there are a bunch of things you can do, but if you just want the cheapest fastest route to more power then sell yours and get a 2000 S.

The money you will spend upgrading the older one will cost more that just buying an S, plus with the S you get the beefier parts and bigger awesome disk brakes.

Then once you get the S, spend a meager $500 for a Top Speed Exhaust and the 2nd cat deletes if you have 2nd cats and you will have a mean sounding, powerful beast of a 986 for minimal time and money, plus some nicer resale value.