any one now if the 409 kit will add a good power to my 99 banshee.im looking to race

[racing_4_life]

im looking to start to hooking my banshee up its a 1999 .and i was wondering if any 1 has the 409 bigbore kit and if so is it worth the money and can u notice th difference.and how much hp does it add.


thanks any other info would be help full