FAT performance T4 shroud

[Oliver Knuf]

The Germans gave this style up, as the original air blades (Porsche part) behind the fan/ring route the air definitely to much to number 1/2 and not to 3/4. Some specially done aluminum sheets have to be fabricated to get it nearly as good as the deeper sitting form. The main difference is the volume and curve from the shroud behind the ring. Nowadays the form falls straight down behind the ring and is very near the engine case. The older forms look more like a bubble, as FAT has! I wouldn't use it!