RE: ULTRATHRUST OR JETT-STREAM?!?!
It's going on a Thunder Tiger Pro .46 ABC in a F-20 Tiger Shark. I've noticed that a lot of people are using the Jett-Stream on there f-20's. I like these two because they are like a tuned muffler but not as big and heavy. If they're the same, I'll probably go with the Jett since it's about 15 bucks cheaper.