Mishimoto MMINT-GRC-23KSLRD Performance Intercooler Kit 2023 2024 2025 Toyota GR Corolla G16E-GTS Silver Intercooler Red Pipes

The Mishimoto MMINT-GRC-23KSLRD is a complete performance intercooler kit engineered specifically for the 2023 and newer Toyota GR Corolla equipped with the G16E-GTS 1.6L turbocharged 3-cylinder engine. This kit replaces the factory tube-and-fin intercooler and charge piping with a high-capacity bar-and-plate core, cast aluminum end tanks, and a full red powder-coated aluminum piping system. Every component is purpose-built for the GZEA14 chassis, making the MMINT-GRC-23KSLRD a true bolt-on upgrade with no cutting or fabrication required.

What's Included

• 1x Silver powder-coated bar-and-plate intercooler core (12-row)
• 1x Intercooler adapter set
• 1x Intercooler adapter retainer set
• 1x Anodized aluminum intercooler ducting set (custom-shaped to maximize core size)
• 1x Red powder-coated aluminum intercooler piping and coupler kit (hot-side and cold-side pipes)
• Wire-reinforced 5-layer DuraCore silicone couplers
• High-torque worm-gear clamps
• All mounting hardware

Intercooler Core

The MMINT-GRC-23KSLRD uses a bar-and-plate core construction, which offers substantially better structural rigidity and heat rejection than the stock tube-and-fin design. Where the factory intercooler runs 9 rows, the Mishimoto unit runs 12 rows at 3.94 inches of thickness, delivering a 52% increase in core volume and a 24% gain in fin surface area compared to OEM. The overall core measures 24.8 inches long by 6.93 inches tall, with a 32.85-inch overall length once the cast aluminum end tanks are included. Those cast end tanks improve flow distribution and eliminate the flex and fatigue common in welded sheet-metal units. The intercooler receives a silver powder-coat finish for a clean, factory-adjacent appearance in the engine bay. Inlet and outlet diameter steps up from the stock 39mm to 41mm (1.77 inches), which contributes to the 10% reduction in airflow restriction measured against the OEM unit. The core is rated to handle up to 400 horsepower and 50 PSI of boost pressure, giving substantial headroom for tuned applications on the GR Corolla.

Charge Piping and Couplers

The kit includes a complete hot-side and cold-side aluminum piping set, finished in red powder coat to match the MMINT-GRC-23KSLRD color designation. Piping connects via wire-reinforced 5-layer DuraCore silicone couplers, which resist collapse under high boost while maintaining flexibility for installation and thermal cycling. Clamps are high-torque worm-gear style to hold coupler seats securely even under sustained boost. Each pipe features integrated 1/8 NPT bungs, giving a direct mounting point for boost pressure sensors, air-fuel ratio sensors, or water-methanol injection nozzles without requiring aftermarket bung welding. The cast throttle body elbow is a notable addition over a simple mandrel-bent piece; the smoother, more consistent bore improves throttle response and reduces turbulence at the throttle body inlet. Mishimoto measured a 91.7% airflow increase over the stock inlet pipes, which reflects both the larger inner diameter and the optimized routing geometry. CNC-machined quick disconnects are included throughout to simplify future removal for service or tune changes.

Performance Data

Mishimoto conducted dyno testing of the MMINT-GRC-23KSLRD on a Dynapack hub dynamometer to isolate drivetrain variables and produce repeatable results. Under normal operating conditions, the bar-and-plate core reduces charge air temperature by approximately 38.5 degrees Fahrenheit compared to the stock intercooler. Under heat soak conditions, where the OEM unit struggles most, the Mishimoto core maintains a 33-degree Fahrenheit reduction, demonstrating that the 52% volume advantage translates directly into sustained cooling performance rather than just first-pull numbers.

On the power side, maximum observed gains reached +11.42 horsepower and +14.93 ft-lbs of torque. Peak gains, measured at the power peak of the run, came in at +8.52 horsepower and +9.01 ft-lbs. These figures reflect the performance ceiling for a stock-tune GR Corolla; a custom tune calibrated to take advantage of the lower charge temperatures and improved airflow will push those numbers higher. The MMINT-GRC-23KSLRD is rated to support up to 400 hp, so it will not become a restriction point on built motor or high-boost applications.

Vehicle Fitment

Fitment Notes

Manual transmission only. The MMINT-GRC-23KSLRD is designed for GR Corolla vehicles equipped with the 6-speed iMT manual transmission. It is not compatible with the 8-speed GR-DAT automatic transmission variant. Verify your transmission type before ordering.

This kit is CARB legal under Executive Order D-759-27, making it emissions-compliant for use in all 50 states, including California. The CARB EO number is D-759-27.

Full Specifications

California Proposition 65 Warning

WARNING: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer, and to lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Warranty and Magnuson-Moss Compliance

The MMINT-GRC-23KSLRD is covered by the Mishimoto Lifetime Limited Warranty. This warranty applies to the original purchaser only and is non-transferable. Coverage includes defects in materials and workmanship for the life of the product. The warranty does not cover damage resulting from improper installation, racing use, or misuse.

Under the Magnuson-Moss Warranty Act, a vehicle manufacturer cannot void your factory powertrain warranty solely because you installed an aftermarket part. A dealer would need to demonstrate that the aftermarket component directly caused the failure in question. The CARB EO D-759-27 designation means this kit meets California Air Resources Board emissions standards, further supporting your position in any warranty dispute related to emissions compliance.

Compare Similar Mishimoto GR Corolla Intercooler Options

If you already have a quality aftermarket charge pipe kit installed or prefer to source piping separately, MMINT-GRC-23SL covers the intercooler core alone. If you want everything in one order with matched hardware, the MMINT-GRC-23KSLRD (red) and MMINT-GRC-23KSLBK (black) are the complete solutions. The only difference between the two complete kits is the pipe finish color; core, couplers, ducting, and hardware are identical.

About Mishimoto

Mishimoto Automotive is an engineering-driven performance cooling brand headquartered in Newark, Delaware. Founded in 2005, Mishimoto develops radiators, intercoolers, oil coolers, catch cans, and ancillary cooling components for a wide range of performance vehicles. Every product goes through in-house design and dyno testing before release, and Mishimoto backs its catalog with a lifetime limited warranty. The company is recognized in the enthusiast community for engineering parts that fit correctly out of the box and deliver measurable results on the dyno and on the road.

Frequently Asked Questions

Will the MMINT-GRC-23KSLRD fit my GR Corolla with the GR-DAT automatic transmission?

No. This kit is designed for GR Corolla models equipped with the 6-speed iMT manual transmission only. It is not compatible with the 8-speed GR-DAT automatic. The piping routing and intercooler positioning are specific to the manual drivetrain layout. If your vehicle has the GR-DAT, this kit will not install correctly and should not be ordered.

Is the MMINT-GRC-23KSLRD legal in California and other strict-emissions states?

Yes. This kit carries CARB Executive Order D-759-27, which means it has been tested and approved by the California Air Resources Board for street use. It is 50-state legal, including California, New York, and all other states that follow CARB standards. Keep a copy of the EO number in your vehicle in case you are inspected.

What does the "KSLRD" suffix mean in the part number MMINT-GRC-23KSLRD?

"K" indicates this is a complete kit (intercooler plus piping). "SL" refers to the silver powder-coat finish on the intercooler core. "RD" designates the red powder-coat finish on the aluminum charge pipes. The sibling part MMINT-GRC-23KSLBK shares the same kit and silver intercooler but carries black pipes ("BK"). If you want the intercooler only without any piping, MISMMINT-GRC-23SL is the core-only option.

How much does charge air temperature actually drop with this intercooler?

Mishimoto's Dynapack testing showed approximately 38.5 degrees Fahrenheit of charge air temperature reduction under normal conditions. Under heat soak conditions, where the OEM intercooler begins to lose effectiveness during repeated hard pulls or spirited driving, the Mishimoto core maintained approximately 33 degrees Fahrenheit of temperature reduction. Cooler charge air means denser air entering the engine, which is the foundation for the power gains measured on the dyno.

Should I buy the full MMINT-GRC-23KSLRD kit or just the intercooler core (MMINT-GRC-23SL)?

Buy the full kit if you are starting fresh or want a matched, tested system. The complete kit includes the cast throttle body elbow, DuraCore couplers, ducting, and the 1/8 NPT bungs in the piping, all of which contribute to the 91.7% airflow gain over stock inlet pipes. If you already have a quality charge pipe kit installed and it is in good condition, the MMINT-GRC-23SL core-only option lets you keep your existing piping and just replace the intercooler. For most GR Corolla owners upgrading from a fully stock setup, the complete kit is the better value and the cleaner installation.

Is there a break-in procedure for this intercooler kit?

There is no formal break-in procedure for the intercooler core itself. After installation, inspect all clamps and couplers for any leaks at idle and under light load before making full-boost pulls. Allow the powder-coat finish to cure for a short period before washing the engine bay. If you are also getting a tune after installation, hold off on hard pulls until the calibration is complete, since the intercooler will change the intake air temperature curve the ECU sees. A post-installation visual inspection of all fittings after the first heat cycle is always a good practice.

Is the Mishimoto lifetime warranty transferable if I sell my GR Corolla?

No. The Mishimoto Lifetime Limited Warranty applies to the original purchaser only. It is non-transferable. If you sell the vehicle with this kit installed, the warranty does not transfer to the new owner. The original purchaser retains warranty coverage for any defects in materials or workmanship regardless of whether the part remains in their vehicle.

Will this intercooler kit work with a tuned or modified GR Corolla?

Yes, and tuned vehicles are exactly where this kit shows its largest gains. The Mishimoto intercooler is rated to 400 horsepower and 50 PSI of boost, giving substantial headroom beyond the stock power level. On a stock-tune GR Corolla, the kit delivers up to +11.42 hp and +14.93 ft-lbs at its maximum. On a custom-tuned vehicle running higher boost or modified fueling, the lower charge air temperatures and increased flow capacity allow the tune to target more aggressive ignition advance and fueling, producing greater gains than what Mishimoto's stock-tune baseline numbers show. The integrated 1/8 NPT bungs in the piping also make sensor placement straightforward for tuners who need accurate IAT or MAP data from the charge pipes.

Does the MMINT-GRC-23KSLRD require any modifications to the GR Corolla's bumper or body?

No. This is a direct-fit kit for the GZEA14 chassis. The custom-shaped anodized aluminum ducting is designed around the existing factory openings and intercooler bay dimensions of the GR Corolla, so no cutting, trimming, or body modification is required. The intercooler core is sized to maximize the available space without requiring any structural changes to the front end.