The rev (desert) pipe will give you more top end but less bottom end than the current woods pipe. The r-b carb mod will give you more of both bottom and top end. I just replaced the rev pipe with the woods pipe on my 220 last weekend, and , with the r-b carb mod, it still has a surprisingly good top end hit, but now with real meaty bottom end too. I think the r-b carb mod would be your best choice if you have to pick one. However, if time is an issue, I understand R-B is backed up right now and would probably take a few weeks. You could have the pipe in a few days from your favorite supplier. I'm betting you go with the pipe!!!