PART NUMBER : 21004-AT012
HKS STROKER KIT 1.75L HIGH COMP STEP 3 G16E GR YARIS ( 21004-AT012 )
Key Features
■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.
■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.
