has anyone tried them? do you really get the claimed hp?

 

we like our BIG GUNS> 00 300 & 400 EX's

 

i have big gun complete system with 155 main 42 pilot and uni-filter with no airbox lid and i smoked 2 other 400's by about 4 or 5 lengths in 3 drag races on sunday,one had a double barrell and the other had a white bros. e-series slip on.

 

On a somewhat built engine they do not flow enough. The best is white bros promeg, or a race exhaust from LRD or Sparks.

 

hey ex2k, who are u? i live in shenadoah too..... i have a 400 on the way and i was looking at a big gun too, no complaints?

 

I JUST INSTALLED MY WB PROMEG SYSTEM WITH TWIN AIR FILTER AND DYNOJET KIT.IM USING 170MJ AND 3.5 TURNS OUT ON FUEL MIXTURE SCREWS. THE RESULT IS A REAL RIPPER, VERY IMPRESSED WITH IT NOT HAVING ANY ENGINE MODS YET....