I run the modded Extech .24 with the standard Extech 2057 pipe in my RC8T CE and I love that motor more than any I've ever run.
I wont stand here and say Scrogg is wrong because he could be spot on. I've only run about 15 litres through mine, (3 and 3/4 gallons approx) and will say the power is extreme. Bottom end is comparabble to my 1515 1Y Neu and easily runs 16T bell on AE Truggy spur (54T) with a 4.30 final drive.
What can I say, it hammers. And thats with between 8 and 12 minutes runtime depending on our weather.
But it does seem people are shying away from carrying parts for them, and even more worrying is that the Trinity Extech doesn't even seem to be on the Trinity site.
I also have the Hara Worlds OS and the JX Ninja for the smaller tracks, of those two the Ninja is the one to have for sure.