I'm looking to get a 426 kit for my 02 400ex cause From what i have heard the 440 runs hot and isnt very reliable. Does anyone know where i can find one cause ive looked everywhere and havent had any luck. Thanks alot.

 

The 440 run very hot. I havent seen the 426 kit but i have seen a 416 kit in dirt wheels magazine and the reviews on it were pretty good. I was gonna do the 440 big bore kit till my buddy blew his up.

 

trinity has some sorta warranty on there big bore kits or something.

 

Damn, ill have to look into that, i seen their ad in dirt wheels and their exhaust are awesome. do you know much about the sparks pipe or the dasa pipe, trying to decide which one to get