While the subject was brought up about Macs pipes.... I've used Macs exhausts quite a bit on my smaller nitro engines. I've been wondering??? On engines like the JBA 15cc, would a Macs pipe work ok with it? I have a 60-90 size P-40 that has a Irvine with a Macs pipe and would like to replace it with a JBA-15cc. The existing fit would be perfect with very little to no mods. Has anyone had any experience of using a nitro engines exhaust on a smaller gasser? How would the performance and practical operations be?