Buying performance parts one at a time is the normal path for most builds, but COBB also sells a bundled option for the Subaru STI that packages three of its most popular…
The factory boost control system on a 2008-2012 Subaru WRX or Subaru STI was engineered for stock hardware and stock boost targets, and it starts showing its limits the moment a build…
Wheel studs are one of those parts that most owners never think about until a specific situation forces the question, adding wheel spacers, running wider wheels, or preparing for track or drag…
Shift feel on a 2015-2019 Subaru WRX suffers from two distinct kinds of slop, and most owners looking to fix it only address one before realizing the other is still there. The…
A stock brake pad on a modified Subaru WRX runs out of margin faster than most owners expect, especially once power, weight from added parts, or more aggressive driving enter the picture.…
The factory clutch on a Subaru STI has a reputation for being tougher than most people expect, and that reputation is largely earned. Owners regularly report holding well past 400 wheel torque…
Most STI builds never need to look past a Stage 1 or Stage 2 clutch. Once a build pushes into serious power territory, particularly with track or strip use in the mix,…
The factory shift linkage on a Subaru STI relies on a soft rubber bushing at the anchor point of the shifter assembly, and that bushing is one of the more overlooked sources…
Not every fuel system upgrade needs to be built around E85. For WRX and STI owners running gasoline and looking for a straightforward, cost effective pump upgrade over the factory unit, the…
More power always means more heat, but the point where cooling actually becomes a limiting factor is not the same for every build. A mild bolt-on car and a big turbo E85…
The whoosh sound of a blow off valve is one of the most recognizable signatures of a modified turbo car, and it is easy to assume that sound comes with a real…
Both of these pumps show up constantly in fuel system upgrade conversations for the WRX and STI, and it is easy to assume the choice just comes down to picking whichever one…
Short ram intakes and cold air intakes each solve a different problem, and each creates a tradeoff the other one does not have. A short ram intake sits closer to the engine…
Every hard launch, every shift, every burst of boost causes the engine and drivetrain to move slightly against their mounts. Most owners notice this as a feel issue, a slightly disconnected sensation…
The AEM 340LPH 65mm Fuel Pump Kit is one of the more popular in-tank pump upgrades on the WRX and STI platform, covered previously in the post on why serious builds skip…