Installing a turbo kit on your Acura Integra Type S (or Honda Integra Type S depending on your market) is one of the most effective ways to transform its already lively personality into a genuine performance machine. With the right turbo system, you can push well past 300 wheel horsepower on the stock block while maintaining driveability. But choosing a kit, managing the budget, and understanding what you’re getting into requires more than a quick glance at a price tag. This expanded guide covers the top brands, realistic power expectations, and a comprehensive look at the costs and considerations that come with forcing air into your K20C1.

Understanding Turbocharging: The Basics

A turbocharger uses exhaust gas energy to spin a turbine, which drives a compressor to force more air into the engine’s intake. More air means more fuel can be added, producing more power during combustion. Key components include the turbocharger itself, a wastegate to regulate boost pressure, a blow‑off or recirculation valve, intercooler, piping, and often an engine management solution (flash tune or standalone ECU).

Turbocharging differs from supercharging by relying on exhaust flow rather than a belt‑driven compressor. This generally yields better efficiency and higher peak power, but can introduce lag if the system isn’t matched well to the engine. For the Integra Type S, the K20C1 engine already has a strong factory block and forged internals, making it an excellent foundation for boost. However, the factory turbo (on the Civic Type R – not present on the Integra Type S) means the Integra Type S arrives naturally aspirated, so a complete turbo system must be added.

Why Turbo the Integra Type S?

The K20C1 engine in the Integra Type S is essentially the same unit found in the Civic Type R, minus the turbo. That means the block, rods, pistons, and crank are already designed to handle forced induction. The engine comes with a low compression ratio (9.8:1) suitable for boost, and the head flows well. By adding a turbo kit, you unlock the potential the platform was originally engineered for. Gains of 50–150 horsepower are common, and with proper tuning, 400+ wheel horsepower is achievable on the stock bottom end. The car also responds well to upgraded fuel systems, intercooling, and exhaust work — which typically come as part of a complete turbo kit package.

Top Turbo Kit Brands for the Integra Type S

Several manufacturers produce bolt‑on turbo kits tailored for the K20C1 Integra Type S. Here we dive deeper into each, covering specific product features, power output, installation difficulty, and where they shine.

1. Greddy

Greddy’s turbo kits for the K20C1 platform are known for their complete, ready‑to‑install nature. Their Greddy T517Z kit for the Civic Type R can be adapted to the Integra Type S with minimal modification. It includes a cast iron exhaust manifold, TD06SL2 20G turbo, large front‑mounted intercooler, blow‑off valve, wastegate, and all necessary piping. Power output typically lands around 350–380 whp on conservative boost (10–12 psi) with pump gas. The kit is relatively straightforward to install, but expect to need a dedicated tune from a Greddy‑authorized tuner. Pricing ranges from $3,500 to $4,500. Greddy’s official site provides model‑specific fitment checks.

2. HKS

HKS offers the GTIII‑LS Turbo Kit, which uses a compact, high‑flow turbine housing designed for quick spool and strong mid‑range torque. HKS kits often include their signature Hi‑Power dual exhaust muffler, intercooler, and suction pipe. The HKS approach emphasizes drivability and reliability. Power gains are typically in the 320–360 whp range on mild settings, with potential for more if fuel system upgrades are added. HKS kits are generally well‑engineered and include detailed instructions, but they come at a premium — often $4,000–$5,500 for the full package. HKS is a solid choice for enthusiasts who value brand heritage and smooth power delivery.

3. AEM

AEM (Advanced Engine Management) has expanded into complete turbo systems. Their AEM Turbo Kit for K20C1 features a billet compressor wheel turbo (often a 500–600 hp capable unit), integrated wastegate and blow‑off valve, and a large bar‑plate intercooler. AEM also sells the kit with or without their Infinity ECU, making it a good option if you plan to go standalone. Expect 350–400 whp on pump gas. The kit is competitively priced around $3,000–$4,000 (without ECU). AEM’s engineering focus on thermal management and noise reduction makes it a quieter option than some competitors. Check the AEM website for current fitment notes.

4. TurboKits.com

As the name suggests, TurboKits.com specializes in complete turbo systems for various performance cars. Their K20C1 kit uses a Garrett GTX3076R or Precision 5858 turbo (depending on options) and includes a Tial wastegate, intercooler, and charge piping. They offer a “stage” approach: Stage 1 is a basic low‑boost kit, Stage 2 adds an upgraded fuel system, and Stage 3 includes a standalone ECU. Power can range from 280 whp (Stage 1, 8 psi) to over 500 whp (Stage 3, higher boost with built internals). Prices start around $2,500 for the base kit and climb to $6,000+ for a full package. The company provides excellent customer support and installation guides. Visit TurboKits.com for more details.

5. Full‑Race

Full‑Race is known for high‑end, race‑proven turbo systems. Their kits are hand‑welded from 304 stainless steel and use precision turbos (like Garrett GTX3584R or BorgWarner EFR). Full‑Race systems are built for maximum airflow and durability, often used in competitive time‑attack and road racing. For the Integra Type S, their kit includes a tubular exhaust manifold, TiAL wastegate and blow‑off valve, and a massive intercooler. Power potential is substantial: 400–600+ whp depending on supporting mods. However, Full‑Race kits are not cheap — expect $5,000–$8,000 for the turbo system alone. Installation requires professional skill and patience. Full‑Race’s site offers detailed specs and application guides.

Other Notable Brands

Precision Turbo offers a popular “6266” kit for the K20C1, and Garrett sells aftermarket turbo assemblies through distributors like ATP Turbo. PTP Turbo Blankets and Mishimoto provide supporting products. Each brand has its trade‑offs in spool, peak power, noise, and cost. It’s wise to compare based on your power goals and driving style (autocross vs. drag vs. street).

Expected Power Gains and Performance Characteristics

Power gains depend heavily on the turbo size, boost pressure, fuel, and tuning. The stock K20C1 engine in the Integra Type S produces about 320 hp at the crank (260–270 whp). With a basic turbo kit at low boost (8–10 psi) and a conservative tune, expect 50–80 whp gain, landing around 320–350 whp. That’s a noticeable step up. Mid‑range torque improves significantly, making the car feel stronger in everyday driving.

  • Stage 1 (bolt‑on turbo, stock fuel): 300–350 whp, 10–12 psi boost. Requires no internal engine work. Use 91–93 octane pump gas. Example: Greddy Stage 1 or HKS base kit.
  • Stage 2 (larger turbo, upgraded intercooler, fuel pump, injectors, and full exhaust): 350–420 whp, 12–16 psi. Requires tune on blend or race gas. Full‑Race Stage 2 or AEM premium kit fits here.
  • Stage 3 (built internals optional, large turbo, standalone ECU, methanol/water injection or ethanol): 450–550+ whp, 20+ psi. Professional installation and constant monitoring recommended for reliability.

Dyno tuning is essential for any turbo install. A mail‑order tune might get you close, but a proper session on a dyno with a skilled tuner ensures safe air‑fuel ratios and ignition timing. Expect to pay $400–$800 for a dyno tune session.

Budget Planning: What to Expect

Many first‑time turbo buyers underestimate the total cost. The turbo kit itself is only the beginning. Below is a realistic breakdown of typical expenses for an Integra Type S turbo conversion.

Turbo Kit

$2,500–$8,000 depending on brand and included components. A “complete” kit must include the turbocharger, exhaust manifold, wastegate, blow‑off valve, intercooler, charge pipes, oil and coolant lines, gaskets, and hardware. Some kits skimp on the wastegate or intercooler — account for that.

Installation Labor

$800–$2,500 if you hire a shop. DIY is possible if you have mechanical experience, but expect 20–40 hours for a first‑time install. A lift, engine support, and specialty wrenches help.

Supporting Modifications

  • Exhaust system: A full 3‑inch cat‑back (or turbo‑back) exhaust is recommended to reduce backpressure. $600–$1,200.
  • Intake system: A cold air intake may be included in the kit. If not, factor in $200–$400.
  • Intercooler upgrade: Many kits come with an intercooler, but if you buy a kit without one, add $400–$800.
  • Fuel system: High‑flow fuel pump and larger injectors for anything above 350 whp. $300–$900.
  • Engine management: ECU tuning via Hondata FlashPro (or K‑Pro for the K20C1) costs $600–$1,000. Standalone ECU like AEM Infinity adds $1,500–$2,500.
  • Clutch: The stock clutch will slip above 350 whp. A performance clutch (e.g., ACT, Exedy, Competition Clutch) costs $400–$1,000 and requires labor.
  • Oil cooler: Highly recommended for track use. $300–$600.
  • Cooling system: Upgrade radiator if needed (often not necessary for street). $300–$800.

Tuning Costs

$300–$1,000 for a proper dyno tune. Remote dyno or e‑tune can be $200–$500, but less precise.

Hidden Costs

Tools, gaskets, fluids, and potential repairs. If the engine is high‑mileage or hasn’t been maintained, consider a compression test and leak‑down test before boosting. Factor in $100–$300 for consumables.

Total realistic budget: $5,500–$12,000+ for a reliable, well‑sorted turbo build. Going cheap often leads to headaches or engine damage.

Installation Considerations and Complexity

Installing a turbo kit on the Integra Type S is not a weekend job for a novice. The engine bay is tight — the K20C1 transverse layout means the exhaust manifold and turbo sit close to the firewall. You’ll need to remove the intake, coolant pipes, and possibly the power steering line for clearance. Many kits require modifying the lower radiator hose or relocating the battery.

Common challenges include:

  • Wastegate placement: Some kits put the wastegate actuator in a cramped spot, making adjustment difficult.
  • Oil feed and drain: Tapping the oil pan for the drain line is critical; a bad drain can cause smoking or turbo failure.
  • Intercooler piping: Routing may interfere with the AC condenser or bumper support. Some trimming is expected.
  • Heat management: Turbo near the alternator and starter can cook electrical components. Heat wrap and a shield are strongly recommended.

If you’re not confident, invest in professional installation from a shop experienced with K20C1 builds. The small added cost can prevent costly mistakes.

Reliability and Longevity

The stock K20C1 engine is robust, but adding a turbo pushes it beyond its natural limits. For long‑term reliability:

  • Keep boost conservative (10–12 psi) on pump gas without water‑meth injection.
  • Upgrade the oiling system: A baffled oil pan and high‑volume oil pump help prevent starvation.
  • Use high‑quality synthetic oil and change it more frequently (3,000–4,000 miles).
  • Monitor AFR and knock: Install a wideband O2 sensor and an electronic boost controller with safety cutoffs.
  • Allow the engine to cool after hard driving before shutdown (turbo timer helps).
  • Consider upgrading the head gasket and head studs if aiming for 400+ whp; the stock gasket can fail under high boost.

Many owners have successfully driven their turbo Integra Type S for 30,000+ miles without issues when properly tuned and maintained. The key is a quality tune and not chasing numbers on pump gas.

Conclusion

Turbocharging your Integra Type S is a rewarding project that can unlock the engine’s true potential. Brands like Greddy, HKS, AEM, TurboKits.com, and Full‑Race offer well‑engineered kits for various budgets and goals. Realistic power gains range from 300 to over 500 whp, but you must budget for supporting modifications, tuning, and installation. Reliability boils down to a conservative tune and proper hardware. If you plan carefully, your boosted Integra Type S will deliver thrilling performance for years to come.