best brand for a 03 ltz 400 rv box ?

[kapnobatai]

 I'm trying to figure out what brand rev box  you guys running ?
I already order AMR big coil kit
W/E2 pipe
155 main jet
foam filter
looking for a header if anyone has one?

[jayman]

Have you done anything with your valves or valve springs?  I only ask because on the 400 forum they say the springs are not strong enough for a rev box and will fail.

[zman03]

my o4 ltz has a rev max but also has valve work,hot cams,high comp piston. sounds like you better get a mechanic before you end up bustin up the bike . Then your gonna spend lots of $$$ to get it fixed.

[kapnobatai]

alright! it looks like am going to get the  engine done inside before getting rev box. good looking out thanks