I'm in the market for an HPDE track day car and am researching the performance difference between the K20 and K24 spec race cars. I don't plan to race the car, but by the same token I don't want to start with yesterday's news.

Are the k20 cars as quick as the k24 cars or are the K20s at a performance disadvantage? I'm also trying to find out what's involved with installing a k24 into a k20 car.

Any information is appreciated. Thanks!