The VQ out of the Nissan/Infiniti's is the best sounding V6 out there...no 3800 can top it. Now you want to get to really good sounding? RB series motors or 2JZGTE's. That would be Skyline/Supra. Sure...it doesn't sound like a V8...but they have their own uniqueness. Everyone has their own thing. And Poli...as for those tips...they are actually a clearanced Roush tip from about 2 years ago. Not sure if they are still for sale and I haven't looked. I paid like $40 a side plus shipping on each one since they weren't sold as a set. They were 3" Roush Racing Dual/Dual Rolled Edge Tips...if I remember right they were supposed to go on the Lincoln LS at one point whe it was still being made.