HKS 1.75 L Stroker Kit Step 3 HC-TT G16E – GR Yaris GR Corolla

Brand
HKS

Compatibility
GR Yaris GXPA16
GR Corolla GZEA14

OEM Part Number
21004-AT012

Features and Specs
G16E－GTS High Compression Stroker Kit
Best performance is shown with High Octane Fuel

■Piston
Diameter：D88/ Weight：314g

• Our crown shaped structure speeds up the combustion spread, suppresses knocking and achieves a high compression ratio.
• A2618 material has high-temperature strength making it possible to make the wall thinner, resulting in weight reduction.
• Precise machining has eliminated excess material, achieving weight reduction.
• Our bridge structure has increased structural rigidity and achieved weight reduction.
• The cooling oil from the three oil jets is efficiently guided through the piston to optimal locations, ensuring effective cooling.
• The area above the top ring groove has been nickel-plated to improve knock resistance and wear resistance.
• The use of a two-layer coating has improved for seizure resistance and lower friction.
• The weight of the port has been reduced by shortening the piston pin.
• The top ring has been titanium-coated to improve durability.
• The edges that are prone to becoming heat spots have been carefully removed by machining.

Triple Tumble Crown Structure

• The tumble flow distribution within the combustion chamber has been refined to minimize the likelihood of knocking.
• The central protrusion of the piston directs the incoming air from the intake port into two distinct area, creating tumble flows that enhance the mixing of fuel and air.
• As the piston rises, a third tumble flow forms on the central intake side, helping flames that ignite near the outer edge of the intake side (an area prone to knocking) spread quickly, thereby reducing the risk of knocking.

■CONROD

• We use machined I-Beam connecting rods made of nickel-chrome steel.
• 25% strength increase over the OEM product.
• Compatible with D24 piston pins.
• WPC surface treatment for improved fatigue strength

■CRANKSHAFT

• A full counter crankshaft machined from chrome steel reduces the burden on the main bearings.
• The inertia weight has been reduced efficiently by positioning the counterweight and reducing the weight of the pin.
• Response is also improved by removing the balance shaft.
• The balance rate of 50%, suppresses the vibrations unique to 3-cylinder engines.