If you like it, they must be some magical ones.
Had the usual 8 port ant the race version, both of them were rubbish. Didn't hold a tune, hadn't enough power and both were very unreliable. Stay away from that engine.
Bought an RB concept engine and all problems, concerning flame outs, idling, power, reliability, temps, passed away. Dont want to remember that headache again. Imagine a 30min final, being first in the A main, at half the race it starts to rain a bit, the car gets a bit heavier and flames out, then again and again and you finish last...It has never happined with my new engine.
I think better spend a bit more money, but buy a good budget engine from a well know brand, like the O.S. VG, RB S3, Werks B3 and so on..