Forged pistons 2.5 TFSI DAZA DNWA DNWB with 95.20mm stroke crankshaft Audi Cupra Donkervoort KTM

Technical Specifications

ZRP, in collaboration with Wiseco USA, has developed a unique series of forged pistons specifically designed for Audi 2.5L TFSI (EA855) engines equipping TT-RS and RS3. These pistons share many advanced features with the Wiseco HD1400 series intended for extreme high-power builds.

Dimensional specifications:

• Manufacturer reference: 23707-830-5
• Bore Size: 83.00mm
• Stroke: 95.20mm (stroker configuration)
• Total piston length: 144.00mm
• Compression height (dome): -9.99mm (dished/concave)
• Pin Size: 21.00mm
• Pin wall thickness: 5.34mm (reinforced)
• Recommended block height: 220.00mm
• Quantity per kit: 5 pistons (inline 5-cylinder engine)

Compression ratio and configuration:

• Kit compression ratio: 9.3:1
• OEM compression ratio: 9.6:1
• Configuration: Stroker (increased stroke vs stock 92.8mm)
• Resulting displacement: ~2.59L (vs 2.48L stock)

Materials and design:

• Alloy: 2618 Low-Silicon / High-Expansion forged
• Forging type: Dedicated in-house forgings (not modified from other applications)
• Design: Lightweight with optimized structural strength
• Piston pin: Offset for reduced friction and wear
• Valve pockets: Enlarged and deepened vs OEM for high-lift camshafts

Rings and pin:

• Recommended rings: Kit 21-GNH08300
• Piston pin P/N: S721
• Pin treatment: Included in piston kit

Special grooves:

• Gas-Pressure grooves
• Anti-Detonation grooves
• Function: Extended ring life, better sealing, detonation resistance

Coating Technologies

Armor Plating Coating (Crown and Pin Bore)

Armor Plating coating gives pistons a characteristic bronze tint on crown and pin bore. This abrasion-resistant plating offers multiple critical benefits for turbo and methanol/nitrous high-power builds.

Armor Plating benefits:

• Increased aluminum hardness (abrasion resistance)
• Enhanced durability of ring grooves
• Prevention of micro-welding of piston rings
• Reduced carbon deposits and buildup
• Protection against detonation-caused corrosion
• Crown temperature reduction of 20°C average (improved heat dissipation)

ArmorGlide Anti-Friction Skirt Coating (Skirt)

ArmorGlide coating applied to skirts is composed of solid Molybdenum (Molly) lubricant permanently bonded to aluminum. This treatment guarantees optimal lubrication from first start-up throughout engine life.

ArmorGlide benefits:

• Seizure resistance during break-in and operation
• Reduced piston/cylinder friction (power gain)
• Silent operation (reduced mechanical noise)
• Decreased piston rock
• Extended cylinder life
• Facilitated and secured break-in

Engine Compatibility

AUDI 2.5L TFSI (EA855)

Audi TT-RS:

• TT-RS 8J (2009-2014) - 2.5 TFSI 340 HP (CEPA/CEPB)
• TT-RS 8S (2016-2023) - 2.5 TFSI 400 HP (DAZA/DNWA)

Audi RS3:

• RS3 8P Sportback (2011-2012) - 2.5 TFSI 340 HP (CEPA)
• RS3 8V Sportback (2015-2020) - 2.5 TFSI 367-400 HP (CZGB/DAZA)
• RS3 8V Sedan (2017-2020) - 2.5 TFSI 400 HP (DAZA)
• RS3 8Y (2022+) - 2.5 TFSI 400 HP (DNWA)

Audi RS Q3:

• RS Q3 8U (2013-2018) - 2.5 TFSI 340-367 HP (CZGB)
• RS Q3 F3 (2020+) - 2.5 TFSI 400 HP (DNWA)

Stroker Configuration: These pistons are designed for stroker configuration with 95.20mm stroke crankshaft (vs 92.8mm stock). Installation requires compatible stroker crankshaft and connecting rods adapted to new stroke.