 In today's Cobb Highlight, we show you a product that will save you time, money, and stress for a common problem found on nearly every EJ powered Subaru, the Cobb Tuning TGV Shaft Seal Kit. The infamous TGVs or Tumble Generator Valves found on Subaru EJ platforms are known to develop an annoying leak at a particular location that will first rear its head with excessive fuel trims and can be confirmed with a pressurized smoke test. The TGVs contain a combo sensor and motor with a shaft that runs through the TGV housing and terminates on the opposite side. That is the specific spot where the leak occurs. There's a small plate bolted to the outside of that location from the factory, but it's basically just a cover, not an additional seal. The Cobb TGV Shaft Seal Kit replaces that cover with a CNC machined aluminum part that bolts into the exact same location but adds an O-ring and a more ideal fitment to provide an actual airtight seal. Meaning that even if the shaft begins to leak within the TGV housing, the entire unit is still completely sealed and will have no adverse effect on air and fuel behavior or overall engine health. But the real value of this part isn't just that it provides a fix for a common problem. It's that it provides that fix in a faster, cheaper and more legal way than the alternatives. Which are to spend a lot of time and money by replacing the entire TGV housing with an OEM part which could still technically leak again in the future. Or doing illegal things to your car that will still cost you lots of time and money versus simply using this budget friendly, easy to use Cobb product that can be installed on either side of the engine without needing to remove the intake manifold. This is one of those parts that may seem like no big deal until you need one, but then you'll be super happy it exists. If one or both of the TGV housings on your EJ powered Subaru start to leak, tumble over to CobbTuning.com to grab the perfect fix.