For cheapness in comparison Cos coolers area good upgrade.

Keeping existing radiator? You may have to cut the bottom of your bumper out to fit the cooler infront of the rad at the bottom of the car.

Hoses: two options for fitting. Reverse charge carrier then pipe up the left-hand side straight to carrier, or keep original carrier and buy some hosing which comes back on itself, then run some pipework over the top of the intercooler then up the right-hand side fixing onto the original carrier boost hose.