TOPLINE SU-11S Pa Engine Piston Set .040 2.5

( Brand: Topline ), ( Manufacturer Part Number: SU-11S ), ( Country Of Origin: Japan ), ( Type: Engine Piston Set )

Review TOPLINE Pa .040 Engine Piston Set Fits Subaru 2.5 New fits 1996–2004

The Subaru SU-11S PA040 engine piston set is a crucial replacement component for Subaru 2.5-liter flat-four engines produced between 1996 and 2004. This piston set, manufactured by Subaru, is designed to ensure optimal engine performance and longevity.

Each piston is crafted from forged aluminum alloy, which provides exceptional strength and durability. The piston crowns are honed to precise dimensions to ensure accurate ring sealing and efficient combustion. The pistons also feature low-friction skirt coatings to minimize wear and tear and promote smooth engine operation.

The piston rings included in the set are designed to provide an ideal seal between the piston and cylinder wall. The compression rings are made from chrome nitride-coated steel, which enhances their durability and wear resistance. The oil control rings are made from composite materials, ensuring efficient oil control and preventing excessive oil consumption.

The piston pins are made from high-tensile steel and are chrome-molybdenum-coated to ensure longevity and reduce the risk of galling and seizure. The piston pin bore surfaces are also treated with a proprietary coating to minimize wear and improve ring sealing.

The SU-11S PA040 piston set is engineered to meet or exceed Subaru's original equipment specifications, ensuring a perfect fit and reliable performance. Installing this piston set in your Subaru engine will help restore its power, efficiency, and longevity, making it an excellent investment for Subaru owners seeking top-tier engine performance.

Pros and Cons of Buying a Topline SU-11S PA040 Engine Piston Set for Subaru 2.5 (1996-2004)

The Topline SU-11S PA040 engine piston set is a popular aftermarket option for Subaru 2.5-liter engines produced between 1996 and 2004. This piston set is known for its high-performance capabilities and durability. In this analysis, we will discuss the potential advantages and disadvantages of investing in this product.

1. Enhanced Performance: The Topline SU-11S PA040 piston set is designed to provide improved engine performance. The forged pistons are stronger and more durable than OEM pistons, allowing for increased power and torque.

2. Engine Longevity: The top-quality materials used in the manufacturing of these pistons contribute to a longer engine life. The forged pistons have a higher compression ratio, reducing the likelihood of engine knocking and piston failure.

3. Customizability: These pistons are available in various sizes and specifications, allowing users to tailor the performance of their engine to their specific needs.

1. Cost: The Topline SU-11S PA040 piston set is a more expensive alternative to the stock pistons. The cost difference may be a deterrent for some potential buyers.

2. Installation Complexity: Installing aftermarket pistons can be a challenging process, especially for those without prior engine rebuild experience. Professional installation is recommended to ensure proper fitment and function.

3. Potential for Engine Damage: Improper installation or use of incorrect piston specs can result in severe engine damage. It is crucial to ensure that the pistons are installed correctly and that the correct specifications are used.

The Topline SU-11S PA040 engine piston set offers several advantages, such as improved engine performance, increased engine longevity, and customizability. However, these advantages come with a higher cost and the complexity of installation. It is essential to weigh the potential benefits against the investment and consider seeking professional assistance during installation to mitigate any potential risks.

If you are an enthusiast looking for increased power and durability from your Subaru 2.5 engine, the Topline SU-11S PA040 engine piston set may be an excellent investment. However, it is crucial to consider the installation complexity and cost before making a purchase. For those with limited experience in engine rebuilding, seeking professional assistance during installation is highly recommended to ensure proper fitment and function.

Details:

Manufactured in Japan, this piston set ensures precise fit and reliable performance for your vehicle. The TOPLINE PA SU-11S .040 Engine Piston Set is a high-quality replacement part made by Topline specifically for Subaru 2.5 engines from 1996 to 2004.

part #: su11s price

• $150.00

specifications voomvalve:

• for makes: Subaru
• for years: 1996-2004
• brand: Topline
• mpn: Su-11s
• country of origin: Japan
• type: Engine Piston Set

payments voomvalve:

• other
• wallet: Apple-pay
• credit card: Visa

general voomvalve:

• Engines Engine Parts > Valvetrain Components > Valves
• condition: New

offer voomvalve:

• started: May 8, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home

shipping voomvalve:

• type: Fixed
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• cost: $19.50
• transit: 3-6 Days
• carrier: FedEx

returns voomvalve:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

seller voomvalve:

• # reviews: 3541
• city: Littleton, Colorado
• rating: 99.2%

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