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Ultimate comparison of typical air inlet trajectory upgrades on Alfa Giulia 105.
Stock Bosch Motronic with plenum and air flow meter 00:00
Upgraded ECU (EFIgnition with Tunerstudio) with plenum 00:34 - no real video.
Weber Carburetors (with long trumpets) 00:49
Jenvey Individual throttle bodies (ITB) with short trumpets/ air horns 01:59
Jenvey Individual throttle bodies (ITB) with long trumpets 03:20
Expensive experiment to show that a stock design isn't that bad.