yes we both do Nasty ass work to the GO Engines ! I havent run one of Brians engines but from all reports they rip ! If you are in the US support your local engine modder and i KNOW Brian loves the Go engines.

The Femca 8081 pipe with all factory testing and my own testing has shown improvement over the 2047 . It is now my preferred pipe for the GO and indeed any engine.. If you are on a sweeping track with long straights then the 2047 is still great .. and having said that its really up to the individual ... you can never state whats the best .. experimentation will tell you what works for you..

The new Gen 5 range of engines from GO and just awesome ! i didnt think we could get it better but its happened !

tuning tip for the GO Pro line of engines , depending on the fuel you run try to not tune for MAX top end till its run in properly .. Some fuel oil packages will take 3 litres others 5 before you see the most out of one of these engines.. So when its new and youre not getting max top end after 4 tanks of run in, thats why ...

Best to condition the engine to the set up in that time .. select your pipe , fuel , tyres etc ..

Pipes and pics are here

http://www.massivemods.com.au/index.php?cPath=1

Hope this helps

www.massivemods.com