SUBARU COS.COS1-KK3920 Cosworth Camshaft Set Avcs EJ25/EJ20

( Manufacturer Part Number: COS.COS1-KK3920 ), ( Type: Camshaft ), ( Material: Steel ), ( Vintage Part: Yes ), ( Finish: Unfinished ), ( Country Of Origin: Japan )

Review SUBARU Cosworth Camshaft Ej25/ej20 Set Of Four Avcs Type fits EJ25 S2 WRX STI

Introducing the COSworth Camshaft Set for Subaru WRX STI models with EJ25 or EJ20 engines, specifically designed for those with AVCS (Active Valve Control System) S2. This high-performance camshaft upgrade is manufactured by COSworth, a renowned name in the automotive industry, known for its expertise in engine tuning and racing technology.

The COSworth camshaft set is meticulously engineered to deliver enhanced power, torque, and overall performance for your Subaru WRX STI. Each camshaft is crafted from top-quality materials, ensuring durability and reliability, even under the most demanding conditions.

The intake camshaft features a high lift profile with a duration of 240 degrees at 0.050-inch lift. The exhaust camshaft boasts a high lift profile with a duration of 252 degrees at 0.050-inch lift. These profiles are designed to optimize intake and exhaust flow, resulting in increased power and torque.

Moreover, this camshaft set is compatible with the factory AVCS system, allowing for optimal valve control and smooth engine operation. The camshafts are also designed to work seamlessly with the factory timing chain and timing gears, making for a straightforward installation process.

Installing the COSworth camshaft set in your Subaru WRX STI is an excellent investment for those seeking to unlock the full potential of their engine. Expect noticeable improvements in power delivery, throttle response, and engine sound. This upgrade is perfect for enthusiasts looking to enhance their daily driver or prepare their vehicle for track use.

In summary, the COSworth Camshaft Set for Subaru WRX STI EJ25/EJ20 engines with AVCS S2 is a high-quality, performance-enhancing upgrade. Meticulously engineered and crafted from top-quality materials, this camshaft set delivers increased power, torque, and overall performance while retaining compatibility with the factory AVCS system.

The Subaru COS (Cosworth) camshafts for the EJ25/EJ20 engines found in WRX and STI models are aftermarket performance parts produced by Cosworth Engineering. These camshafts are designed to provide improved power and torque output, enhanced engine response, and increased durability compared to the stock camshafts. Here are some potential pros and cons of buying these camshafts:

1. Power and Torque: The Cosworth camshafts can help increase power and torque, making your Subaru WRX or STI more responsive and quicker.

2. Engine Response: These camshafts can provide better engine response, allowing for smoother power delivery and improved throttle response.

3. Durability: Cosworth Engineering is known for its high-performance components, and these camshafts are designed to withstand the rigors of high-performance driving.

4. AVCS (Active Valve Control System) compatibility: The AVCS system is used to control the timing of the exhaust valves, and these camshafts are designed to work with it, ensuring optimal engine performance.

1. Cost: Aftermarket performance parts like the Cosworth camshafts can be expensive, and the cost may not be justified for some drivers.

2. Installation: Installing aftermarket camshafts can be a complex process and may require professional assistance, adding to the cost and time involved.

3. Potential for increased emissions: These camshafts can increase engine performance, which can also lead to increased emissions. Some drivers may not want to deal with the potential emissions-related issues.

4. Potential for increased noise: The Cosworth camshafts can result in increased engine noise, which may not be desirable for all drivers.

The decision to buy the Subaru COS Cosworth camshafts ultimately depends on your individual driving needs and preferences. If you're looking for improved power and torque, enhanced engine response, and increased durability, then these camshafts may be worth the investment. However, if you're concerned about the cost, installation complexity, potential emissions issues, or increased noise, then these camshafts may not be the best choice for you.

If you're considering buying the Subaru COS Cosworth camshafts, I would recommend doing thorough research and consulting with a Subaru performance specialist to determine if these camshafts are the right choice for your specific driving needs and budget. Additionally, make sure to consider the potential costs of installation and any potential modifications that may be required to ensure proper compatibility with your Subaru WRX or STI.

Details:

Using their knowledge of a complete cylinder head when developing and designing high performance multi-valve heads, Cosworth creates designs that ensures deliver on all required efficiency. Used in good condition. For older EJ motors with Single AVCS Cosworth Camshaft Subaru WRX STI EJ25/EJ20 Set of four AVCS Type S2 More than 50 years engineering camshafts has given time to analyze all potential options for producing the most effective, dependable and dominant product on market. Have been sitting.

These camshafts proudly put forth maximum usable power and this runs across the absolute widest band.

part #: coscos1kk3920 prices

• $650.00-$1084.95

specifications cashalif:

• for models: Ej25, S2, Wrx, Sti
• for makes: Subaru
• mpn: Cos.cos1-kk3920
• type: Camshaft
• material: Steel
• vintage part: Yes
• finish: Unfinished
• country of origin: Japan

offer cashalif:

• availability: In Stock
• best offers: True
• sold: 0
• started: May 11, 2026
• quantity: 1
• options: Ship-to-home

returns cashalif:

• policy: No Returns

shipping cashalif:

• carrier: UPS
• class: Standard
• service: UPS Ground
• type: Calculated
• cost: $16.46
• transit: 3-9 Days

general cashalif:

• condition: Used
• Engines Engine Parts > Valvetrain Components > Camshafts

seller cashalif:

• rating: 0.0%
• city: Macomb, Michigan
• # reviews: 0

payments cashalif:

• credit card: Diners-club
• other
• money order
• wallet: Paypal

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