COBB Catch Can Kit Subaru Forester XT (2004-2007) 811615
Fitment Information
-
Subaru Forester XT SG (2004, 2005, 2006, 2007, 2008)
- Fits both Manual and Automatic Transmission
Emissions Compliance
- 50 State Legal - This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D-660-25 / D-660-45
Specs & Features
- The Dream Team: Developed in direct partnership with IAG Performance, combining the industry's best separation technology with COBB's signature style and support.
- Zero Sludge: Features a unique Coolant Routing System that heats the canister to engine temp, evaporating condensation so you don't end up with a "mayonnaise" mess in winter.
- Cyclonic Separation: The bottom is shaped like a "Snail", creating a vortex that flings oil to the walls and drains it back to the crankcase while letting clean air escape.
- Massive Capacity: Boasts a huge 1-Liter Holding Capacity, meaning you can run high boost or pull high-G corners on the track without the system overflowing.
- Direct Venting: Unlike cheaper cans that tee lines together, this system gives Each Engine Port (heads and block) its own dedicated line for maximum pressure relief.
- Underhood Jewelry: Finished with a wrinkle black powder-coated body and Bespoke COBB Anodized Caps with laser-etched logos to match your other COBB components.
Product Description
If you own a Subaru EJ engine, you know the struggle: excessive crankcase pressure pushes oil vapor into the intake. This "blow-by" mixes with the fuel, effectively lowering the octane rating and inviting the Subaru killer: detonation (knock). The COBB Tuning Air/Oil Separator is the fix. It intercepts that oily air before it hits the intake, scrubs it clean, and returns the oil to the oil pan where it belongs.
This isn't a simple catch can you have to empty every week. It is a maintenance-free system developed alongside the block experts at IAG Performance. The magic lies in the Cast Aluminum "Snail" Design. By directing crank pressure into a swirl pattern, the AOS uses centrifugal force to separate the heavy oil droplets from the air. The oil drains back down, and the clean air vents out.
Size matters when you are pushing boost. Small catch cans fill up quickly, especially during heavy cornering or high-RPM pulls. With a 1-liter capacity (approx. 4" wide x 5.75" tall), this unit has the volume to handle the heavy breathing of a built engine without choking. It also features independent ports for all three engine vents (left head, right head, block), ensuring crankcase pressure never builds up enough to blow out a seal.
Many AOS systems fail in cold weather because water vapor freezes or mixes with oil to form a yellow sludge. COBB solved this by integrating a Coolant Heating System into the backplate. By keeping the can at operating temperature, water evaporates instantly, leaving only clean oil. It even includes a Coolant Bleeder Valve to make installation painless—no air pockets, no overheating.
Think of this as a kidney for your car. It filters out the toxins that kill performance. By keeping oil out of the intercooler and combustion chamber, the COBB AOS ensures the engine is always burning clean fuel. It’s the single best preventive modification for any EJ-powered WRX or STI. Protect the investment and keep that boxer rumbling for years to come.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
COBB Catch Can Kit Subaru Forester XT (2004-2007) 811615
COBB Catch Can Kit Subaru Forester XT (2004-2007) 811615
Fitment Information
-
Subaru Forester XT SG (2004, 2005, 2006, 2007, 2008)
- Fits both Manual and Automatic Transmission
Emissions Compliance
- 50 State Legal - This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D-660-25 / D-660-45
Specs & Features
- The Dream Team: Developed in direct partnership with IAG Performance, combining the industry's best separation technology with COBB's signature style and support.
- Zero Sludge: Features a unique Coolant Routing System that heats the canister to engine temp, evaporating condensation so you don't end up with a "mayonnaise" mess in winter.
- Cyclonic Separation: The bottom is shaped like a "Snail", creating a vortex that flings oil to the walls and drains it back to the crankcase while letting clean air escape.
- Massive Capacity: Boasts a huge 1-Liter Holding Capacity, meaning you can run high boost or pull high-G corners on the track without the system overflowing.
- Direct Venting: Unlike cheaper cans that tee lines together, this system gives Each Engine Port (heads and block) its own dedicated line for maximum pressure relief.
- Underhood Jewelry: Finished with a wrinkle black powder-coated body and Bespoke COBB Anodized Caps with laser-etched logos to match your other COBB components.
Product Description
If you own a Subaru EJ engine, you know the struggle: excessive crankcase pressure pushes oil vapor into the intake. This "blow-by" mixes with the fuel, effectively lowering the octane rating and inviting the Subaru killer: detonation (knock). The COBB Tuning Air/Oil Separator is the fix. It intercepts that oily air before it hits the intake, scrubs it clean, and returns the oil to the oil pan where it belongs.
This isn't a simple catch can you have to empty every week. It is a maintenance-free system developed alongside the block experts at IAG Performance. The magic lies in the Cast Aluminum "Snail" Design. By directing crank pressure into a swirl pattern, the AOS uses centrifugal force to separate the heavy oil droplets from the air. The oil drains back down, and the clean air vents out.
Size matters when you are pushing boost. Small catch cans fill up quickly, especially during heavy cornering or high-RPM pulls. With a 1-liter capacity (approx. 4" wide x 5.75" tall), this unit has the volume to handle the heavy breathing of a built engine without choking. It also features independent ports for all three engine vents (left head, right head, block), ensuring crankcase pressure never builds up enough to blow out a seal.
Many AOS systems fail in cold weather because water vapor freezes or mixes with oil to form a yellow sludge. COBB solved this by integrating a Coolant Heating System into the backplate. By keeping the can at operating temperature, water evaporates instantly, leaving only clean oil. It even includes a Coolant Bleeder Valve to make installation painless—no air pockets, no overheating.
Think of this as a kidney for your car. It filters out the toxins that kill performance. By keeping oil out of the intercooler and combustion chamber, the COBB AOS ensures the engine is always burning clean fuel. It’s the single best preventive modification for any EJ-powered WRX or STI. Protect the investment and keep that boxer rumbling for years to come.
Original: $565.00
-70%$565.00
$169.50Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Fitment Information
-
Subaru Forester XT SG (2004, 2005, 2006, 2007, 2008)
- Fits both Manual and Automatic Transmission
Emissions Compliance
- 50 State Legal - This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D-660-25 / D-660-45
Specs & Features
- The Dream Team: Developed in direct partnership with IAG Performance, combining the industry's best separation technology with COBB's signature style and support.
- Zero Sludge: Features a unique Coolant Routing System that heats the canister to engine temp, evaporating condensation so you don't end up with a "mayonnaise" mess in winter.
- Cyclonic Separation: The bottom is shaped like a "Snail", creating a vortex that flings oil to the walls and drains it back to the crankcase while letting clean air escape.
- Massive Capacity: Boasts a huge 1-Liter Holding Capacity, meaning you can run high boost or pull high-G corners on the track without the system overflowing.
- Direct Venting: Unlike cheaper cans that tee lines together, this system gives Each Engine Port (heads and block) its own dedicated line for maximum pressure relief.
- Underhood Jewelry: Finished with a wrinkle black powder-coated body and Bespoke COBB Anodized Caps with laser-etched logos to match your other COBB components.
Product Description
If you own a Subaru EJ engine, you know the struggle: excessive crankcase pressure pushes oil vapor into the intake. This "blow-by" mixes with the fuel, effectively lowering the octane rating and inviting the Subaru killer: detonation (knock). The COBB Tuning Air/Oil Separator is the fix. It intercepts that oily air before it hits the intake, scrubs it clean, and returns the oil to the oil pan where it belongs.
This isn't a simple catch can you have to empty every week. It is a maintenance-free system developed alongside the block experts at IAG Performance. The magic lies in the Cast Aluminum "Snail" Design. By directing crank pressure into a swirl pattern, the AOS uses centrifugal force to separate the heavy oil droplets from the air. The oil drains back down, and the clean air vents out.
Size matters when you are pushing boost. Small catch cans fill up quickly, especially during heavy cornering or high-RPM pulls. With a 1-liter capacity (approx. 4" wide x 5.75" tall), this unit has the volume to handle the heavy breathing of a built engine without choking. It also features independent ports for all three engine vents (left head, right head, block), ensuring crankcase pressure never builds up enough to blow out a seal.
Many AOS systems fail in cold weather because water vapor freezes or mixes with oil to form a yellow sludge. COBB solved this by integrating a Coolant Heating System into the backplate. By keeping the can at operating temperature, water evaporates instantly, leaving only clean oil. It even includes a Coolant Bleeder Valve to make installation painless—no air pockets, no overheating.
Think of this as a kidney for your car. It filters out the toxins that kill performance. By keeping oil out of the intercooler and combustion chamber, the COBB AOS ensures the engine is always burning clean fuel. It’s the single best preventive modification for any EJ-powered WRX or STI. Protect the investment and keep that boxer rumbling for years to come.
