ive got a 2002 90 s tdi and want more from it , whats the best start , a filter and drill the air box and an exhaust , whats the best filter and exhaust to get chip/ remap and is it best to get filter and exhaust first then the map.
Just remap it mate. Airfilters and exhaust etc are a waste of money unless you intend spending thousands on injectors and bigger turbo. Drilling the airbox is a stupid thing to do as the engine will then be sucking in hot air from the engine bay which will make you loose power not gain it.
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