I have an 01 24v and it's all stock except for the recently installed 5 inch turbo back straight pipe. And it's extremely laggy. It has barley any acceleration. What can I do to fix this?

 

50-70 hp injectors will really wake up the beast, give better mileage, but won't melt down the engine.

An upgraded fuel pump is extremely recommended, FASS or AirDog. Keep the expensive, sensitive injection pump happy! I recommend this before any fueling modification (injectors, chips, etc)

 

5 inch is to big without supporting mods. I would look at getting a lift pump preferably a FASS, followed by a fuel pressure gauge, them a tuner to bump up the power.