Performance on both are going to be the same. Piping size is the same and both made of titanium. They're both superlight as well. I like the HKS because you can find them for <500 used.
Performance on both are going to be the same. Piping size is the same and both made of titanium. They're both superlight as well. I like the HKS because you can find them for <500 used.