This is here to show the power gains made by fitting a set of 40mm ITB intakes to a standard 2.5L 6 cyl engine with no other modifications, note the gains made to the mid and lower rpm range.
To drive this car the transformation was quite impressive.
Engine M20 BMW 6cyl 2valve 2500cc
Intake RHd 40mm ITB, 40-42 air box spacers and 42mm velocity stacks
Head 885 casting unmodified standard 42/36 valves
ECU EMU stand alone ecu, Alpha-n load control
Exhaust Generic aftermarket headers, single tail pipe
Fuel premium Pump fuel
Power1 standard intake 112Kw (150Hp)
Power 2 RHD ITB intake 130Kw (175Hp)