I have a '03 z400 with a dyno jet kit, k&n, pro-circuit t-4 slip on, and i removed the noise baffle on the intake to increase airflow. i was considering getting a header pipe for it but i wasnt sure if the $150 it costs to get one would be worth it. also will any header pipe mount right up to the t-4 or do you need to get a mid-pipe as well? any suggestions...?

 

i would call t-4 were u got the slip on.... i have a hmf slip on and then i decided i wanted to get the header pipe and they said i would need something else. that i couldn't just by a header pipe and put it on there but i would look into it

 

most slip ons are made to fit the stock header and if you want to get a header for it then you have to get a full exhaust system
because the header pipe will be different and yes a header pipe will make a difference

 

true! i thought about getting a yoshi slip on and saving for the header later.no go ,like mucky said slip on made for stock pipe . if you plan on doing alot of mods spend the money and do it right. got my yoshi full from rocky mountain for 400,cheapest place i found it.