The new Integra Type S has generated significant buzz among automotive enthusiasts, particularly regarding its performance capabilities. One modification that many are considering is the installation of a Mishimoto intercooler. This article explores whether a Mishimoto intercooler can boost performance on the new Integra Type S, including aspects of cost, installation, and expected horsepower gains.

Understanding Intercoolers and Their Benefits

An intercooler is a heat exchanger that cools compressed air before it enters the engine's intake manifold. In turbocharged engines like the Integra Type S's K20C1, the turbocharger compresses air, which raises its temperature significantly. Hotter air is less dense, contains less oxygen, and increases the risk of detonation. The intercooler dissipates this heat, delivering denser, oxygen-rich air to the combustion chamber.

Factory intercoolers are designed for a balance of cost, packaging, and adequate performance under normal driving conditions. However, they often become a bottleneck under sustained boost, high ambient temperatures, or after other modifications. Upgrading to a performance intercooler like Mishimoto's yields three primary benefits:

  • Reduced intake air temperature (IAT): A more efficient core can lower IATs by 20-40°F under load, directly improving knock resistance and power output.
  • Lower pressure drop: Mishimoto's bar-and-plate design minimizes airflow restriction compared to the stock tube-and-fin core, allowing the turbo to work less and maintain boost pressure.
  • Consistent performance: An upgraded intercooler resists heat soak, meaning repeated hard pulls or track sessions won't result in dramatic power loss.

Mishimoto specifically uses a bar-and-plate core with cast end tanks and TIG-welded construction, which is more durable and efficient than the factory's tube-and-fin design. Their units are also designed to be direct bolt-on replacements, preserving factory mounting points and hose routing.

Cost Breakdown: What to Expect

The total investment for a Mishimoto intercooler upgrade on the Integra Type S ranges from approximately $800 to $1,500 depending on whether you perform the installation yourself and whether you purchase additional components. Here is a detailed breakdown:

  • Mishimoto Intercooler Kit: Priced between $600 and $900. The kit typically includes the intercooler core, silicone hoses, T-bolt clamps, and mounting hardware. Some kits include optional charge pipes for a complete front-mount setup.
  • Installation Labor: Expect $200 to $500 at a reputable shop, with rates of $100–$150 per hour. The job takes 2–4 hours depending on shop familiarity and whether any bumper modifications are needed.
  • Additional Parts (if not included): New coolant (if draining is necessary), replacement clamps, or an optional blow-off valve upgrade. Budget $50–$150.
  • Tuning: To fully realize gains, an ECU tune is strongly recommended. A custom tune or off-the-shelf flash from a platform like Hondata or K-Tuner runs $400–$800.

Total DIY cost: roughly $1,050–$1,400 with tuning; shop installation pushes that to $1,250–$1,900.

Step-by-Step Installation Guide

Installing a Mishimoto intercooler on the Integra Type S is a moderate-level DIY job, requiring basic hand tools, a jack and jack stands, and about 3–4 hours. Mishimoto provides detailed instructions, but the steps below outline the general process.

Preparation and Tools

  • Socket set (10mm, 12mm, 14mm), screwdrivers, trim removal tools, torque wrench
  • Jack, jack stands, or ramp to elevate the front of the vehicle
  • Gloves, safety glasses, and a coolant drain pan (if removing lower hoses)

Step 1: Remove the Front Bumper Cover

Unclip the plastic fasteners along the top edge of the bumper, remove the wheel arch liner screws, and undo the lower splash shield bolts. Gently pull the bumper cover forward and disconnect the fog light harnesses (if equipped). Set the bumper aside in a safe location on a blanket to prevent scratches.

Step 2: Remove the Stock Intercooler

Disconnect the two intercooler charge pipes (inlet and outlet) from the turbo outlet and throttle body. Unbolt the stock intercooler from its mounts — typically two bolts at the bottom and two at the top. Carefully maneuver the intercooler out through the front opening. It may be necessary to loosen the AC condenser support brackets for clearance.

Step 3: Prepare and Install the Mishimoto Intercooler

Inspect the new intercooler for any shipping damage. Transfer any OEM rubber grommets or mounting bushings to the Mishimoto unit if required. Position the intercooler in the same location and secure it with the supplied bolts. Torque to the values specified in the instructions (typically 15–20 ft-lbs). Attach the silicone hoses and T-bolt clamps loosely before tightening everything to avoid twisting.

Step 4: Reconnect Charge Pipes and Hoses

If the kit includes aftermarket charge pipes, install them now, ensuring the couplings are fully seated. Tighten all clamps to 3–5 Nm (not overtightened to avoid cutting hoses). Reconnect any sensors (IAT, MAP) that were removed.

Step 5: Reinstall the Bumper Cover and Test

Refit the bumper cover, reconnect fog lights, and secure all fasteners. Lower the vehicle, check for leaks by pressurizing the system (a boost leak tester is ideal), and perform a test drive. Monitor IATs with an OBD2 scanner to confirm improvements.

Horsepower Gains: Real-World Dyno Results

Expected horsepower gains from a Mishimoto intercooler alone are modest, but when paired with a tune the improvements become substantial. On the Integra Type S, stock dyno figures are approximately 300–310 whp (depending on ambient conditions). Here is what real-world users and third-party testers report:

  • Intercooler only (no tune): Gains of 5–10 whp and 10–15 lb-ft of torque, primarily from reduced pressure drop and lower IATs. The power becomes more consistent across repeated runs.
  • Intercooler with ECU tune: With a conservative 93-octane or E30 tune, gains jump to 25–40 whp and 30–50 lb-ft. The cooler air allows the tuner to advance timing and lean out fuel mixtures safely.
  • Maximum potential: Combined with a full turbo-back exhaust, intake, and ethanol fuel, some owners have seen upwards of 370 whp — a gain of 50–60 hp over stock.

Dyno tests from sources like Engineering Explained and forums such as IntegraForums.com confirm that the Mishimoto intercooler drastically reduces intake temperatures (by 25–35°F on back-to-back pulls) and maintains power where the stock unit would heat-soak and lose 10–15 hp.

It's important to note that gains vary with climate, fuel quality, and overall vehicle health. Always perform a baseline dyno run before and after modifications to measure your specific results.

Additional Performance Benefits

Heat Soak Resistance

The stock intercooler's tube-and-fin core heats up quickly after a few hard runs. On a 90°F day, IATs can soar above 150°F, triggering the ECU to pull timing. Mishimoto's bar-and-plate design and larger core volume keep IATs below 120°F even during extended spirited driving. This translates to consistent power at the track or during canyon runs.

Throttle Response

By reducing restriction, the turbo spools more efficiently and responds to throttle inputs faster. The improved airflow also benefits part-throttle driving, making the car feel more responsive in daily driving.

Reliability and Longevity

Lower intake temperatures reduce the risk of knock, which can damage pistons and ring lands over time. The Mishimoto intercooler is also constructed from cast aluminum and welded stainless brackets, offering superior durability over the stock crimped-end tank design.

Tuning Considerations

To extract the full potential of the Mishimoto intercooler, an aftermarket tune is highly recommended. The stock ECU's fuel and timing maps are set conservatively and won't take advantage of the cooler air. A simple flash using a Hondata FlashPro or K-Tuner V2 allows a tuner to increase boost, advance ignition timing, and optimize the air-fuel ratio.

On the stock tune, you might see marginal gains, but the real benefit is preventing heat-related power loss. With a tune, the intercooler becomes a foundational component that supports all other modifications. Be aware that some dealerships may void engine warranty if they detect a tune, so consider that when planning your upgrades.

Potential Drawbacks and Considerations

  • Cost: At $800–$1,500 for the full setup, this is a significant investment. Compare to cheaper options like a simple turbo inlet pipe or intake, which cost less but yield smaller gains.
  • Fitment Nuances: While Mishimoto claims bolt-on compatibility, some users report minor trimming of the lower bumper grille for the larger core. Follow the instructions carefully to avoid damage.
  • Warranty Concerns: Installing an aftermarket intercooler itself is unlikely to void the warranty, but if it contributes to an engine issue (e.g., from poor installation), the manufacturer may deny a claim. Use a certified installer.
  • Weight Increase: Mishimoto's bar-and-plate core is heavier than the stock unit by about 3–5 lbs. This is negligible for most drivers but worth noting for purists.
  • Need for Supporting Mods: The intercooler works best when paired with a high-flow intake and exhaust. If your car is otherwise stock, consider doing intercooler and intake together for complementary gains.

Conclusion

Installing a Mishimoto intercooler on the new Integra Type S is a smart performance upgrade for anyone who pushes their car beyond commuting. It lowers intake temperatures, improves consistency, and, when paired with a proper tune, can unlock 25–40 whp. The cost is reasonable for the quality of construction and the tangible benefits on the street or track. While the stock intercooler is adequate for daily use, the Mishimoto unit solves the heat soak problem that plagues the Type S during aggressive driving. Whether you're building a track weapon or simply want a more responsive daily driver, this intercooler is a worthy addition to your parts list.

For more information, visit the Mishimoto official product page or read real owner experiences on the Integra Forum.