[pgarner]

vortex generators, electric supercharges ecoteck valves are all a waste of money

the vortex generators do what just about every intake manifold does anyway which is cause a disturbance to the airflow to allow better circulation

the electric superchargers - theres no way the motors could substantially move enough air to make much a difference

ecotek valve if you like induction noise then there alright you get the same sound when you lift off but no difference to performance

the chips on the other hand.

the cheap tuning boxes etc that are on ebay for a tenner dont bother there mainly just resistors that trick your engine into thinking the chokes still on. risk damage damage to engine

reputable companies will offer proper chipping or remaps to the ECU which will give a performance increase without damage to the engine. granted on a NASP engine your only looking at about 5 - 8 bhp