The Swiss Special 944 was a very limited edition 944 Special produced in 1984. Only 200 944 Swiss Specials were produced and it was largely a design exercise, with several upgrades to the normal 944. The changes included, Red-colored stickers on the back of "Porsche” “944", Special size teledial rims, Seats , rear bench and door panels in 924 Carrera GT fabric and dashboard plastic parts in black instead of the standard silver.
In 1983, American tuning company Callaway Cars began offering a turbocharged package for the US-Spec 944 in collaboration with Porsche. The standard 2.5 L inline-four engine was not suitable for forced induction because of the higher compression ratio of 9.5:1 which made the engine prone to failure when subject to forced induction along with the complex Bosch Motronic engine management system.