[VelovetAndy]

They are very, very nice . The question is what difference do they make compared with your scorpion ( noise excepted!)

 

[VelovetAndy]

Thank you. Interesting analysis . If you are using more than just a few pounds of boost, then, as you say , scavenging the burnt gases becomes critical , so I am sure that when you get to the rollers, you will see gains . Might need some adjustment to fuelling as well though .