HKS Forged Piston Full Kit G16E 1.75L HC-TT S3 (21004-AT012)
The G16E-GTS High Compression Stroker Kit is engineered to deliver maximum performance by increasing displacement and raising compression, significantly enhancing power and response across the rev range. Designed for serious enthusiasts and competitive builds, this kit unlocks the true potential of the G16E-GTS engine when paired with high-octane fuel, ensuring optimal combustion efficiency and power output. Crafted with precision and built from premium materials, the stroker kit improves torque, throttle response, and overall engine performance. It’s the ultimate upgrade for those seeking superior acceleration, sharper engine response, and reliable high-performance operation in both street and track conditions.
Application
- TOYOTA GR COROLLA (2023, 2024, 2025)
Features
- 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.
- 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.
Connecting rods
- 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.
Specificaitons
- Boar: 88.0 mm
- Stroke: 95.7 mm
- Displacement: 1,746 cm3
- Comp. Ratio (t=0.79): 11.6
What's in the box?
- Piston Kit D-88 (incl. Piston Rings and Pins)
- Conrod Set
- Crankshaft
To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.
Depending on the package, we ship using different carriers according to the item's location, content, and size.
Freight truck & international items, will require up to 7 business days to ship due to size and logistics.
All orders made after 3:00pm ET will be processed the next business day.
Unless otherwise noted as "In Stock" or exact ETA. Special order/ Made to order items have an estimate of 5+ weeks for USA made parts and 8+ weeks for JDM/ Overseas parts.
Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $200.
All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.
Processing and logistics on in stock international orders can take up to 7 business days to process & ship.
In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).
Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.
For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
HKS Forged Piston Full Kit G16E 1.75L HC-TT S3 (21004-AT012)
