Description
Engineered for uncompromising strength and durability, the IE Spec JE Forged Pistons are the ultimate upgrade for high-boost Audi B9 3.0T builds using the EA839 engine. Developed in collaboration with JE Pistons, this complete six-piston set is specifically tailored to pair perfectly with IE’s Tuscan 144X22MM connecting rods, creating a bottom-end combination capable of supporting up to 1000 ft-lbs of torque.
These pistons are not only lighter and stronger than factory components—they are meticulously engineered to withstand extreme cylinder pressures and the brutal conditions of big-turbo and motorsport applications.
Key Features
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Complete set of 6 forged pistons with pin locks, JE Pro Seal rings, and 22mm wrist pins
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Designed for direct fitment with IE Tuscan 144X22 connecting rods
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Drop-in 84.5mm bore sizing for use with stock cylinder bores
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Optimized 10.0:1 compression ratio to reduce knock in high-boost applications
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JE’s Tuff Skirt® coating improves wear resistance and piston longevity
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Forged from JE’s 983M high-performance alloy, engineered for high load and RPM durability
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Average piston weight: 307 grams
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Purpose-built dish and dome design with precision valve reliefs for Audi 3.0T combustion geometry
Compression Ratio Optimized for Boost
Factory compression ratios on the EA839 engine are known to be susceptible to detonation under elevated boost pressures. Through extensive R&D and in-house dyno testing, IE determined that a reduced 10.0:1 compression ratio provides an ideal balance—safely lowering cylinder pressures without compromising off-boost responsiveness or tuning flexibility. This makes the pistons an ideal choice for big turbo conversions and professional-level tuning environments.
High-Performance Design & Materials
Built for motorsport abuse, these pistons utilize a lightweight forging designed to withstand over 8000 Gs of force and survive over 200 directional changes per second. The 22mm wrist pins offer unmatched stability and strength, while the forged 983M material delivers durability under sustained load, high RPMs, and extreme heat. Every piston features JE’s signature skirt coating, which significantly reduces friction and improves long-term wear characteristics.
Precision Manufacturing & Quality Control
Each piston is produced in JE’s state-of-the-art manufacturing facility with a strict 23-point inspection process to ensure accuracy in 14 critical dimensions. All measurements are taken in a climate-controlled lab (68°F, 40% humidity) to guarantee consistent piston geometry and weight balance. This level of precision manufacturing ensures that every set of pistons delivers consistent performance and drop-in reliability.
Application Compatibility
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Engine: Audi EA839 3.0T V6 Turbocharged
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Chassis: Audi B9/B9.5 S4, S5, SQ5 (and other EA839 3.0T-equipped platforms)
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Rod Compatibility: IE Tuscan 144X22MM Connecting Rods
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Compression Ratio: 10.0:1 (Optimized for high-boost applications)
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Bore Size: 84.5mm (Factory size, no machining required)
Build with Confidence
When paired with IE Tuscan Connecting Rods, this forged piston set forms the foundation for a track-proven bottom end capable of handling extreme builds. Whether you're pushing your EA839 to its limits with a hybrid turbo setup or going all-out on a race-prepped engine, this combo offers the strength and performance you need.
