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HKS Nissan GT-R VR38 Forged Piston & Connecting Rod Set (Stage 1)

$4,295.00

SKU:

21004-AN016

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Product Description

HKS Nissan GT-R VR38 Forged Piston & Connecting Rod Set (Stage 1) 2009+ VR38DETT, Forged Pistons, H-Beam Connecting Rods Features High Output Part The bore sizes of both Piston Kit and Connecting Rod Set are the same as the factory sizes so they can be replaced with the factory parts. To avoid piston land breakage, HKS pistons are made with forged material instead of casting like the factory pistons. It’s recommended to use with other items of the GT800 Package. In-house test at 900PS confirmed the durability and safety. The setting range is widened by reducing the compression rate from 9.0 factory ratio to 8.7. This is effective to increase the engine output using the aluminum block specs and/or bigger cylinder bore. Factory Replacement Type The weight of the connecting rod is the same as the factory since the affect of the V6 engine’s peculiar vibration should be considered. The piston is light-weighted to approximately 25g. The weight is optimized to install with the factory crankshaft so it is not necessary to use a dummy weight to balance. Expertise on the Factory Parts & Reliable In-House Products The 3D profile for the piston was chosen from various profile tests. The forged material exclusively for HKS and the optimal piston shape are utilized. With the results of our analysis on the factory connecting rod, the durability is improved by approx 46% maintaining the balance. All parts are MADE IN JAPAN (in-house product). Specifications HKS Stock Bore x stroke φ95.5 X 88.4mm φ95.5 X 88.4mm Compression ratio ε 8.7 ε 9.0 Gasket thickness HKS t 0.8 t 0.80 Displacement (cc) 3799 3799 Piston Bore dia. φ95.5 ← same Compression height 34.30 mm ← same Concave portion on top 8.01 cc 4.49 cc Material Forged (no hollow channel) Casting (with hollow channel) Reference weight 420 g 445 g Pin Size φ23 X 60mm φ23 X 62.5mm Ring TOP B size 1.2 mm ← same SEC B size 1.2 mm ← same OIL B size 2.0 mm (3 piece) ← same Connecting rods S. end hole size φ23 ← same L. end hole size φ59 ← same Center hole 165.1mm ← same Material SCM + thermal refining Steel cast Reference weight About 722 g About 724.6 g Set weight dispersion Less than 1.0g ? Bolt M9 X P1.0 / 14.9T ← same

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