I have a big hillclimb race in 3 weeks time, so far I have done to my civic-
Front and rear upper strut braces
16'' Wheels with used road tyres
proper racing oil and decent oil filter (green hamp filter)
pod filter (only used for racing as it is a little warn)
Taken part or half of the exhuast off

When i get my money back, I am getting-
set of Koni Sports struts (maybe if i have enough- and Ground Control coilovers)
new spark plugs and 6 or 7 core racing leads

What else can help me can go faster at the top of the hill?

Brakes and rotors are good, clutch is still good (i wont buy a lighten flywheel until the clutch is close to dead), hand break still good (due to a hairpin at the top hehehe! ), I am not allowed to take more than 50% i believe of the interior off due to class regualtions (I am in 0cc-2000cc road regsitable).

I maybe taking it a bit too far but my memo is Life is short, RACE HARD!