My custom exhaust

[xbalance]

I plan to install a custom make header for my yaris but still not sure few item.
what is the most ideal size for 4-2-1 header setup?

Example size for 4-2 & 2-1 tube size and best length to built?

for the 4-2-1 final 1 out if use 2" tube will it be too big for our little 1nz-fe to push?

[Tonavi]

Originally Posted by xbalance

I plan to install a custom make header for my yaris but still not sure few item.
what is the most ideal size for 4-2-1 header setup?

Example size for 4-2 & 2-1 tube size and best length to built?

for the 4-2-1 final 1 out if use 2" tube will it be too big for our little 1nz-fe to push?

I wouldn't know, but I've heard that there's no point to going more than 2.5 inches on this motor unless you have forced induction.