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Old 05-12-2019, 10:05 AM   #7
Member#: 198281
Join Date: Dec 2008
Chapter/Region: MAIC
Location: Virginia
2005 WRX/STi
WRB of course


Originally Posted by GravyRobber View Post
My basically stock engine failed at 15,800 miles. You might be surprised at how early you join the "after market club". That said, I hope your car runs strong for years to come. I feel like mine was a bit of a lemon.
Keep in mind the RA and 2019+ STi has a different SB assembly compared to your 2017. I know it's too early to give any conclusive 'result' but I don't believe there have been any ringland issues with the new part numbers used.

The RA and 2019+ also has a different knock sensor and knock detection strategy. Comparing stage 1 2017 vs stage 1 2019 (same as 2018 RA) you do see the newer engine making more power too. There are just a lot of little changes that were made for the RA and 2019 that I think add up to a bit better reliability and power. Take it for what it's worth; my speculation based on observations and no long term data. Conversely, the RA and 2019 STi seem to be running out of fuel sooner. So you can't make as much power once you start down the mod list with stock fueling. Difference aren't huge, but they are there.
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