Cougar KF2 slim wheels
 

What difference do the slim front wheels make to the handling on the KF2.

I think you'll find most use the slim front wheels on 2wd or cut the standard rims to the same size. Most of the Schumacher 2wd front tyres are designed for a slim wheel.

Slim wheels won't necessarily make a difference to the handling of the car, it just depends on what tyres you are running. For example cut staggers need a slim wheel, but if you use full 2wd width ballistic fronts, then these will need a full width wheel. Hope this helps.