The big CF air filter housing and intake duct make the most of the limited space available under the hood (there never seems to be enough room with a transverse engine). Quick release pins make for quick removal of the intercooler for servicing, and the Peterson 400 series remote oil filter housing offers 60 micron filtration and easy servicing. The GoPro mount on the intercooler ducting seems odd, and may have been used for tuft testing to make sure it was functioning properly.
The K-PAX CF hood features plenty of vents for the intercooler and to extract air from the engine bay, especially around the turbo.
The front splitter is fairly standard fare for door slammer racing. The OEM bumper lip probably adds a little downforce as well.
K-PAX builds the CF quarter panels, fenders, doors, roof, hood, trunk lid, and bumpers in house, meaning nearly the entire exterior of the car is made out of carbon fiber. The lower side skirts also help to keep air from curling under the car at speed.