Where to buy Twin Turbo Kit for a 318

Turbo: generally harder to package due to plumbing, down pipe, etc. Higher underhood heat. Required Oil and possible water lines to and from turbo. HP is created from exhaust gas flow, minimal parasitic losses.

Supercharger: no exhaust plumbing, lower underhood heat, possibly oil lines, no water lines. Belt and bracketry to contend with. Belt slippage. Tension on front of crank, possible bearing wear on front mains, and lots of parasitic loss from the engine turning a pump that is trying to force air into engine.