Can a built 5-Speed be as strong as an STI 6-speed

Our Question of the Week this week is one that comes up pretty regularly which is, can you build a 5-speed Subaru transmission to be as strong as an STI 6-speed?

We have helped a lot of people to put an STI 6-speed transmission into their WRX, but sometimes when we are talking to someone about their options, they often ask about options to build their 5-speed WRX transmission as well.

Since this is the transmission that the WRX came with, this can definitely seem like a simpler option since there are no questions about fitment, rear differentials, or wiring, etc.  But can it be as strong or as reliable as an STI 6-speed transmission?

Thanks for watching and Stay Tuned!