t-4 or full big gun

[thebig450es]

I have a T-4 slip on and a full big gun system for my 02 400ex which one would make more power?

[honda400ex2003]

two totally different things here. you should really compare apples to apples. lol. a slip on will never yield as much as a full. it depends on how you want the power and where. how and where do you want the power? steve

[honda400ex2003]

with your mods the full is not doing too much anyway. you will have more top end with the full than with the t-4 since the header is bigger that the stock one diameter wise. the bigger the pipe the higher the power. i love my t-4 for mid and low. the sparks key will take care of more mid and some more top end too. i think you would like the results but again it depends on where you want the power. steve