[CigaR007]

Originally Posted by SentraSE-R

Why don't you consider swapping a C160 six-speed transmission into your Echo?

There is way too much work involved in custom-fitting (frame needs to be cut and re-welded) it on an Echo.

As per this thread

(My 6 Speed conversion Thread - DIY Section - yarisfans - Toyota YarisFans: The Echo and Yaris Fans Community)

the 6-speed conversion was 350 RPM higher at 100 km/h than the 5-speed tranny.