Tf135 upgrades for next summer

My TF 135 is fitted with a Mike Satur Daytona back box and has been re-mapped by Z & F Tuning . Both these mods have worked well and the car pulls much better. I do a hillclimb drivers' school at least once a year and am now looking to do a couple of further upgrades.I am thinking of changing the air inlet system for the engine and better front brakes as the standard brakes are lacking in any bite in my opinion.Unfortunately I have 15 inch wheels and can't run to 16 inchers so I can use 4 pot calipers.Can anyone recommend the best way to go with these planned changes please?

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