Originally Posted by MaddMax
No quite sure why so many say this. The 2008+ STI motors (the pistons) are more fragile than their WRX counterparts. The 6MT is beefy, but so is the 2009+ 5MT. Very few come close to maxing out the strength of the newer 5MT.
And while the STi clearly has its strengths and several "good enough from the factory" parts, there are still a number of weakness that the WRX and STi both
share, and any aftermarket part will blow away the stock on either.
For example, the pitch stop might be a "6/10" on the WRX and an "8/10" on the STi, but a Kartboy for either
is like "9.5/10"
need steering rack inserts.
need rear diff inserts.
need transmission mounts.
So something to at least consider if planning to buy and upgrade an STi is that some of that additional sticker price went into some of those marginally
better STi parts that you will still
be wanting to upgrade anyway.
xluben is the perfect, albeit extreme, example of this...He's upgraded the tires, wheels, springs, struts, gears, pistons, header, turbo, intercooler, probably all of the drivetrain mods, maybe even brakes? There's not whole lot left of that WRX that came from subaru lol. And I'll bet nearly every part he's touched is now better than what the STi comes with.
I wish I could have stood on the assembly line at Subaru and just handed them all of the aftermarket parts I wanted in my car and just pay the true difference, rather than having tons of stock parts lying around for when I have to revert to stock and sell it