If this engine really is the same as the Mega ZX, then run it with the 6 fins header and Novarossi 2052 pipe... you will be even more pleasantly surprised...
I ran my Mega DSII engine's with the 2018 and 2033 exhausts, but after trying the 2052, even more power comes alive....[/QUOTE]
I tried the 2052 pipe/header combo this past weekend and it was amazing. I've ran my DSII for about 5 or 6 months now with the 2033 and had no complaints but the power from the the 2052 is very surprising. Try it.