HKS 21004-AT011 Piston and Conrod Kit Step 3 for TOYOTA GR Yaris (XP210) 2020-

New G16E-GTS Piston & Conrod Kit for High Compression: Original Piston Crown Design to improve knock resistance.

Billet Piston Kit Bore: d-87.5 / Weight: 352g

• To enhance knock resistance and achieve higher compression ration, we have adopted HKS's unique "Triple Tumble" crown structure. (Triple Tumble crown structure)
• The piston crown's design creates a third tumble flow on the intake side as the piston moves upward. This quickly spreads the flame near the edge of the intake side, which helps prevent engine knock.
• High-temperature-resistant A2618 material and precision machining combine to deliver significant weight.
• "Bridge Concept Design" (BCD) structure enhances structural rigidity and contributes to weight reduction.
• Three oil jets deliver cooling oil precisely for effective cooling.
• Nickel plating above the top ring groove improves knock resistance and wear resistance.
• A two-layer coating enhances anti-seizure properties and reduces friction.
• Original shortening piston pin design reduces the weight of the piston pin boss section.
• Titanium coating on the top ring enhances durability.
• Precisely machined edges prevent heat spots.

Billet I-beam connecting rod

• Features machined nickel-chrome steel I-beam connecting rods. 25% stronger than the stock components.
• Compatible with d-24 piston pins.
• Surface is finished with a WPC treatment to increase fatigue strength.

Specifications

• Bore: 87.5mm
• Stroke: 89.7mm
• Displacement: 1,618cc
• Compression Ratio (t=0.79): 10.6

Note: For best performance, install the piston kit and connecting rods as a set. Installing them separately may cause imbalance and vibrations.