HKS Capacity Upgrade BCD Pistons STEP 2 Full Kit (Bore: 86.5) - Nissan Skyline GT-R RB26DETT 89-02

Description

Based on the 2.8L STEP 2 kit and upgraded with lightweight, high-rigidity forged "BCD" pistons. Includes the billet BCD piston kit, H-beam connecting rod, and lightweight forged crankshaft.

Specifications:
Bore: 86.5mm
Stroke: 77.7 mm
Compression Ratio (t=1.2): 8.7
Allowable rotating speed: 9,000 rpm
Displacement: 2,740 cc

Piston Kit
- It achieves a thin wall by employing the A2618 alloy, which is resistant to high temperatures.
- We have increased rigidity structurally by adopting a bridge structure.
- Profile optimization has shortened the Piston skirt height and reduced weight.
- Short piston pit with the lightweight boss part.
- Friction is reduced with a two-layer coating of fluorocarbon resin and molybdenum.

Crankshaft stroke 77.7 mm
- The exclusive material is used, and adopting a full counter provides a good rotation balance and makes it possible for high rotation.
- The response improves by reducing the weight of the pin journal and the center part.

Connecting Rod
- Exclusive forged material is used. An H-beam is adapted to withstand a powerful explosion load. WPC treatment is applied to the surface to improve fatigue strength.