ORIGINAL: MTK
The header was a stock return to center from DA. At least I think it is stock....it has a flex joint at the goose neck wrapped with teflon unsintered tape. The pipe is the stock ESC G55 carbon unit. I'm using a length of 28'' from exhaust port flange, around the goose neck to the baffle. The length is not terribly critical at +/- 1''. Output won't change unless you went way out on the length
Speedracer,
Another header that fits the DLE/DA50-55-60 is the Hatori. Just bought one of them from Graves RC. A little more expensive than the DA at around 80$, except it is aluminum versus steel and fits very tightly around the cylinder head. It intended for narrow Pattern style fuses or warbirds.
DA's header has a flex joint and I highly recommend a flexible joint be set-up in the Hatori too. Flexibility is necessary otherwise header breaks will happen. I also soft mount to pipe (simple Dave Brown style set-up) to keep things from snapping apart