I recently replaced my glow plugs and injector o rings, so I'm now looking for some performance upgrades. I would love to make the turbo whistle louder similar to a 6.0, while still not being too loud if that's possible. I'm going to get a TS-6 chip first. It's completely stock of my understanding. 250,000 miles. Early 99. Any suggestions? I don't want it much louder than it is right now so my neighbors don't get angry at me. Thanks in advance!! Josh.