This is a TokenSolutions spec Saikou Michi Co built "Micro Style" advanced oil catch can system. 

TokenSolutions takes pride in being a go-to company for advice on proper possitive crank case ventalation plumbing and ventilation techniques, and now offers a custom spec can to properly address the Lexus IS300 platform.

The internals of the catch can is built for superior possitive crank case ventalation filtration, catching the smallest of vapors preventing ANY oil from coating the turbo inlet piping, turbo, charge piping, pool in the intercooler and prevent vapors from entering the intake manifold and into the combustion process.  The system is a dual-can setup with easy drain fittings on the bottom.  The dual setup uses "thin wall technology" allowing for proper threading of fittings, but reducing overall weight.  The cans are built from aluminum and painted flat black, rust and corrosion simply will not happen.

Catch Can and PCV 101:

Before tight emissions, cars would simply vent their crank case to atmosphere- this is needed as even the healthiest of engines have minor blow-by and combustion gases escape past the piston rings into the crank case, pressurizing it if there is no relief, and contaminating the oil.  As emissions became a larger priority, cars were designed to use engine vacuum to suck these fumes into the intake to be combusted.  A great side-effect from this policy is extending the oil's life, as contaminants that otherwise would condense and work it's way back into the oil now evaperates from the hot oil, and is wisked away along with the blow-by gases into the intake system.

These oil vapors however, are known for lowering octane value and coating piping and manifolds, making a rough sticky film robbing you of optimal flow and power.  Worse-yet is when the application has high supercharger of turbocharger boost, the blow-by can cause large amounts of these fumes to be injested by both the intake piping pre-charger, and post charger into the intake manifold.  To keep the piping, intercooler, turbo, manifold etc protected, whilst also maintaining the possitive benifits of a modern PCV system, these vapors need to be filtered out before entering the OE PCV system into the intake manifold.

Catch cans are used in four ways:
1 )a can takes both ports on the valve cover to a can, and a vent with filter to atmosphere. IMO this is the "race car" setup where its track rules to have a can so oil slicks are not left of the track, and the oil is changed every race. This is the WORST for your oil longevity, it does not allow ample ventilation/suction of contaminants.  Not an issue with a race car that has frequent changes, but not good for a daily driver.

2) One single catch can on the "intake" of the crank case vent system (with our car that is the PCV barb over the exhaust side of the engine). This is plumbed so that intake- tube- catch can- exhaust came side PCV barb. Intake cam side remains OE. This should NOT see oil at all, unless you are in boost A LOT and/or of have blow-by issues. I call this setup the "Oh Sh*t" setup, to catch oil if one starts to have excessive blow-by. For instance on my boosted IS, with a single can in the "oh sh*t" setup, the line from the PCV barb has a little bit of oil vapor on it, but the can does not have a drop or any oil or even film in it. In boost the crank case pressure builds up a bit and has no where to go (PCV is seeing positive intake manifold pressure and is closed), so the only relief the crank case has is through the PCV barb it usually uses as an intake.  A healthy engine will not have enough blow-by to make this messy, but an engine with high amounts of blow-by and/or in race conditions will begin to ventalate large amounts of crank case fumes through this part of the system.

3) One single catch within the intake cam PCV barb (this is where the one actual PCV is on our car). This can will see the actual evaporated gases in generous amounts even with the healthiest of engines as its the gases from the hot oil being and minor blow-by being sucked up by the engines vacuum. This can setup will require regular drainage, and this is the intended plumbing for those trying to prevent those gases/fluids from entering the intake tract and possibly lower octane levels. This setup requires a high quality can as it will see boost pressures, and more-so it needs to thoroughly catch vapors. 99% of the cans on Ebay are just empty cans, they DO NOT have filtration material to catch and condense the vapors. They are built more so for the first mentioned style of plumbing, to prevent big spurts of oil from getting on the track.

4) Dual can setup. IMO ideal for a street and track car. It is plumbed in both 2) and 3). It would be either two separate cans, or some makers weld two cans together- or if a single unit with four barbs, as long as its two barbs per a separate chamber. This way you are intercepting the fumes that will go into the intake tract possibly 'over-coating' your intake and also lowering you octane rating, and it also plumbs in the "oh sh*t" can for excessive blow-by, be it a compression issue or a hard day at the track in boost. This protects both the octane and surface cleanliness of the intake, and the "oh sh*t" can protects the turbo and intercooler from gunking up and pooling up with oil.

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The TS Spec dual can setup addresses all angles a catch can are supposed to cover.  It is simply the most comprehensive and yet easy to install catch-can setup for the Lexus IS300.

The TS Spec single can setup addresses #3

The TS Spec single can with crank case filter addresses #3, and allows one to delete the crank case intake plumbing from their intake piping and simply put a crank case breather filter on the OE barb above the exhaust cam cover near the firewall.