Dyamite 26, Mach 427, Sportwerks 26.

I see a lot of inter-changable parts. Are they the same engine???

How about pipes? Sportwerks mayhem HT pipe and the Losi HT pipe.

The Mach .26 and the Mach 427 are two different engines. I'm not sure about the Sportwerks .26

The Sportwerks and Mach 26's are the same engine with the exception of the carb. The carb on the Mach does not have interchangable inserts, the Sportwerks does. No differences besides that as far as I'm aware.
Don't have a clue about the 427 other than to know it's a .26 engine also.

My best guess is "yes", they're all 3 the same engine relabled with different cooling heads and carbs.

the thing you say about pipes is interesthing. Maybe the sportwerks HT pipe is cheaper on the bay.

I'm working on a project truck. I have a mach 427 and going to put it in a revo (ok, ok no flaming...lol). I'm using the sportwerks PS eliminator, I've read about the sportwerks carb 9mm and how it makes the 427 really wake up also. So I was wondering about the pipe. I have to use the header from a Losi 8ight to side pipe it on a revo but I wanted to go with the HT (since I've read its a great pipe). I can across the sportwerks Mahem HT pipe and was wondering if its the same (the eliminator & carb work so I figured I would check out the pipe).