Wiseco K694M9558-3D Nissan VR38DETT HD Forged Piston 95.58mm Bore -7cc Dome 9.5:1 Sport Compact

The Wiseco K694M9558-3D is a high-performance HD forged piston engineered specifically for the Nissan VR38DETT 3.8L twin-turbo V6. Featuring a 95.58 mm (+0.08 mm over-bore) diameter, a -7cc dome profile targeting approximately 9.5:1 compression, a 1.210 in. compression height, and a 0.9055 in. wrist pin diameter, this piston is purpose-built for demanding high-power builds.

Key Features:

• HD Forging: Produced from 2618 high-strength aerospace-grade aluminum alloy for superior tensile strength and thermal fatigue resistance under boost
• -7cc 3D Dome Crown: Precision-machined complex dome profile with fully machined crown features and specially designed valve pockets for optimal flow and clearance
• ArmorGlide® Skirt Coating: Proprietary skirt coating provides seizure resistance, reduced friction, and quieter piston operation
• Precision Ring Grooves: CNC-machined ring grooves with anti-detonation groove and additional ring seal-improving features for high-boost applications
• Forced Pin Oiling: Integrated forced pin oiling for improved wrist pin lubrication under high-load conditions
• Steel Nitride/Napier XX Rings: Premium ring package included, optimized for high-performance and forced-induction use
• Made in the USA: Engineered, forged, and machined at Wiseco's Mentor, Ohio facility

Specifications:

• Bore Diameter: 95.58 mm (3.760 in.) — +0.08 mm over standard
• Compression Height: 1.210 in.
• Pin Diameter: 0.9055 in. (23.0 mm)
• Dome Volume: -7cc
• Target Compression Ratio: ~9.5:1
• Alloy: 2618 High-Strength Aluminum
• Quantity: 1 Piston (single)
• Part Number: K694M9558-3D

Wiseco's Sport Compact HD piston line is built for serious engine builders who demand the highest level of durability and precision in heavy to severe-duty race and street-performance applications.