I did you a lot of research. The best set up that I have come across and did is a stage 7 with Jon CornellĀ“s 4-2 full exhaust. I unplugged the vboost so it can still be there if I ever feel like putting it back. If you are not looking to do any jetting I would at least put on UFO full exhaust system. I use to have an 88 vmax with a kerker 4-2-1. Great pipe for sure! But I am way more impressed with the sound and power from the UFO set up. I also do have to say Jon Cornell was awesome! He walked the people that I had do my jet kit thru the whole process step by step to make sure it was dialed in correctly. Go to www.UFOCYCLES.com for more info and sound clips. I hope this helps you out!