Wossner 0.25mm Oversize Piston Kit for Subaru Impreza WRX STi 2.5L EJ257 2004-2021

Wssner K9467D025 Oversize Piston Kit

Elevate your Subaru Impreza WRX STi 2.5L 16V with the precision-engineered K9467D025 Oversize Piston Kit from Wssner. With over 25 years of expertise in high-performance piston and connecting rod manufacturing, Wssner has established itself as a paragon of engineering excellence. This piston kit is meticulously crafted to meet the demanding standards of discerning automotive enthusiasts and professional builders alike.

Design & Engineering

Each piston is forged from premium materials, ensuring unparalleled strength and longevity. The K9467D025 features a 0.25mm oversized design, allowing for enhanced cylinder bore dimensions of 99.75mm, which optimizes combustion efficiency while reducing internal friction. The pistons are precisely machined using state-of-the-art CNC technology, ensuring tight tolerances that guarantee consistent performance across the board.

Wssner's commitment to quality is reflected in its rigorous manufacturing process. Each component undergoes extensive quality control measures, including dyno validation and CFD modeling, to ensure that every piston not only meets but exceeds the expectations of high-performance applications. The result is a product that embodies both craftsmanship and technical rigor, making it an indispensable addition to your performance build.

Technical Specifications

• Piston Oversize: 0.25mm
• Bore Size: 99.75mm
• Piston Size: 99.67mm
• Ring Part Number: (997XPY) 99.75mm Four Stroke Ring Set 1.5 x 1.2 x 2.5mm
• Clip Part Number: (CA23) Circlip 23mm x 1.5mm - Pair
• Wrist Pin Part Number: (WP082-SP) 23x56x13 5 Wall 124 Grams

Fitment

• Subaru Impreza WRX STi 2.5L 16V | Engine Code EJ257 (2004-2021)

Customer Insights

Owners have reported transformative results with the K9467D025 kit. One Subaru WRX STi enthusiast shared, Fitted to my 2015 WRX STi, the Wssner pistons have dramatically improved throttle response and overall power delivery. The engineering precision is evident; the pistons align flawlessly with OEM specs, and the performance gains are palpable at high RPMs.

With Wssner, you are not just purchasing a component; you are investing in a legacy of performance and quality. Experience the Wssner Way, where cutting-edge technology meets the art of engineering, designed for those who demand nothing but the best from their automotive pursuits.

⚠WARNING: Cancer and Reproductive Harm
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