Here is my take on pipes running on my truggy:
JP-1 - Great for bottom end punchiness handy on small tracks with lots of jumps - run times good. No Efra
JP-2 - Great for big tracks running 14t+ clutch - run times not so good. No Efra
JP-3 - Massive power throughout the entire rev range, this is the chaved out chavalier pipe - downside is run times are really bad. Efra OK
JP-4 - The best of the Jammin pipes, good power across the band, maybe a little light at top end - very good run times. Efra OK
OS 2050 - Similiar to the JP3 but not so bad on fuel usage, lots of bottom end - 10 minute run times no problem. Not EFRA Stamped
OS 2060 - If your speed is too much power for you to control then this is the pipe for you. It smooths out the powerband particularly at the bottom end allowing much more control. Run times suffer a little but for long finals I find this pipe quite good. Efra OK
EBMods Tuned - In my view this is the daddy of them all. Hard coated anodised black great power and control through the range and incredible run times - 11-12 minutes. EFRA ok.
The Ebmods pipe is cheap as chips too:
http://www.rccompound.com/ProductDetails.asp?ProductCode=EBpipeThe downside with most of the pipes above is that next year they in buggies they will all be bin jobs as EFRA is moving to 3000 range of pipes.
Regards,
Neil.