Acura B18C1 Engine for Sale – Complete Specifications, Compatibility & Fitment Guide

If you are searching for an Acura B18C1 engine for sale, the B18C1 is a popular option to consider for an Acura Integra GS-R replacement, restoration or performance-oriented build. Manufactured as part of Honda's B-series engine family, this 1.8-liter DOHC VTEC engine is known for its high-revving design and factory performance configuration.

The B18C1 was originally fitted to selected Acura Integra GS-R models. It combines Honda's VTEC variable valve timing and lift technology with a four-cylinder, naturally aspirated engine configuration.

Whether you need a replacement engine for an existing Integra GS-R or are planning a compatible B-series engine swap, understanding the B18C1's specifications, vehicle compatibility and installation requirements is important before purchasing.

When comparing available B18C1 engines, buyers should confirm the engine code, condition, included components, mileage (if documented), and compatibility with their intended vehicle.

Acura B18C1 Engine Specifications

The B18C1 is a naturally aspirated 1.8-liter engine featuring a DOHC 16-valve cylinder head and Honda VTEC technology. Its factory specifications make it suitable for buyers seeking an original GS-R engine configuration.

Specifications are based on factory Integra GS-R information and published B18C1 technical references. Actual engine condition and performance depend on maintenance, wear and modifications.

Compatibility / Fitment Notes

The Acura B18C1 engine was originally designed for the Acura Integra GS-R. Its transverse engine configuration and front-wheel-drive layout make it relevant to compatible Honda and Acura B-series engine swap projects.

However, engine compatibility depends on more than the engine code. Buyers should check engine mounts, transmission compatibility, wiring, ECU configuration, fuel system connections, cooling components and vehicle generation before purchasing.

Original vehicle compatibility

• 1994–2001 Acura Integra GS-R: The primary factory application for the US-market B18C1 engine.

• Acura Integra DC2: Common two-door GS-R chassis application.

• Acura Integra DB8: Four-door GS-R chassis application.

Potential engine swap applications

The B18C1 may also be considered for selected Honda Civic, Acura Integra and other B-series-compatible projects.

Depending on the vehicle, additional components or modifications may be necessary, including:

• Compatible B-series engine mounts.

• Appropriate B-series transmission.

• Matching engine wiring harness.

• Compatible ECU and engine management.

• Suitable axles and intermediate shaft.

• Cooling system connections.

• Exhaust manifold and exhaust system compatibility.

• Fuel delivery and electrical connections.

Important: Not every Honda or Acura equipped with a B-series engine is a direct-fit application for the B18C1. Confirm the vehicle's year, chassis code and existing drivetrain before ordering.

Engine Configuration

The B18C1 uses an inline four-cylinder configuration with a dual overhead camshaft (DOHC) cylinder head and 16 valves.

Its VTEC system changes valve operation at higher engine speeds to support the engine's high-rpm performance characteristics.

The engine also features a dual-stage intake manifold, which helps optimize airflow across different engine operating ranges.

This configuration makes the B18C1 a consideration for:

• Acura Integra GS-R restoration projects.

• Original engine replacement.

• Honda and Acura B-series conversions.

• Naturally aspirated performance builds.

• Enthusiast vehicle projects.

Engine Displacement

The Acura B18C1 has a factory displacement of 1,797 cc (1.8 liters).

Its 81 mm cylinder bore and 87.2 mm piston stroke provide the engine's original displacement and contribute to its characteristic performance profile.

The factory compression ratio is 10.0:1.

When purchasing a replacement engine, buyers should verify that the engine retains the correct B18C1 identification and has not been substantially modified or rebuilt with different internal components.

Fuel Type

The B18C1 operates on unleaded gasoline, with premium unleaded fuel recommended for its factory compression configuration.

Its original PGM-FI fuel injection system electronically manages fuel delivery according to engine operating conditions.

Before purchasing, check whether the engine comes with its original or compatible fuel injectors, fuel rail, intake manifold and related components.

Fuel system compatibility should also be checked when installing the engine in a different vehicle.

Aspiration / Induction

The Acura B18C1 is a naturally aspirated engine, meaning it does not use a factory turbocharger or supercharger.

Its factory induction system combines:

• Naturally aspirated airflow.

• DOHC cylinder head design.

• VTEC variable valve timing and lift technology.

• Dual-stage intake manifold.

• Electronic fuel injection.

This configuration provides a factory-engineered balance between everyday engine operation and high-rpm performance.

Buyers interested in turbocharged applications should understand that forced induction requires appropriate supporting modifications and engine management.

Power Output

The factory-rated B18C1 produces approximately 170 horsepower at 7,600 rpm.

Its high-revving DOHC VTEC design is one of the characteristics that distinguishes it from standard non-VTEC B18-series engines.

For customers purchasing an Acura B18C1 engine, it is important to distinguish original factory specifications from modified engine performance figures.

Actual output depends on the engine's mechanical condition, internal modifications, ECU calibration, fuel quality and supporting components.

Torque

The B18C1 produces approximately 128 lb-ft of factory-rated torque at 6,200 rpm.

Its power delivery is designed around naturally aspirated high-rpm operation, supported by its VTEC cylinder head and dual-stage intake system.

When considering a used B18C1 engine, buyers should request information about compression testing, leak-down testing and any available running-condition documentation.

Years / Generation

The B18C1 was used in the US-market Acura Integra GS-R during the third-generation Integra period.

The 1994–2001 model-year range is commonly associated with the US-market B18C1-equipped Integra GS-R. Verify the original engine code and model specification when purchasing an engine advertised as B18C1.

What to Check Before Buying an Acura B18C1 Engine

Finding an Acura B18C1 engine for sale is only the first step. Before completing your purchase, consider the following factors.

1. Engine identification

Verify the B18C1 engine code and check the identification markings to avoid confusing it with other B18-series engines, including the B18B1, B18C2 and B18C5.

2. Engine condition

Ask about the engine's operating condition, mileage, maintenance history and whether it has undergone previous repairs or rebuilding.

3. Compression and leak-down testing

Request available compression or leak-down test results to help assess cylinder sealing and internal engine condition.

4. Included components

Confirm whether the engine is supplied as a complete assembly or as a long block. Ask about the inclusion of the intake manifold, alternator, distributor, starter, fuel injectors, sensors and other accessories.

5. ECU and wiring

Check whether the original or compatible ECU and wiring harness are included. These components are important for proper engine management and VTEC operation.

6. Shipping and warranty

Before ordering, confirm shipping arrangements, packaging, delivery costs and any applicable warranty or return policy.

Find an Acura B18C1 Engine for Sale

Looking for an Acura B18C1 engine for sale for your Integra GS-R replacement or Honda B-series project? Choosing the correct engine configuration is essential for achieving proper fitment and avoiding unnecessary installation complications.

When comparing available engines, prioritize verified engine identification, documented mechanical condition and compatibility with your vehicle.

Whether you are restoring a factory Acura Integra GS-R or planning a B-series engine conversion, the B18C1 offers the original 1.8-liter DOHC VTEC configuration sought by Honda and Acura enthusiasts.

Contact our sales team to inquire about B18C1 engine availability, pricing, included components and shipping options. Provide your vehicle's year, make, model and chassis code so that compatibility can be checked before purchase.

Request a quote today and find the right Acura B18C1 engine for your project.

Frequently Asked Questions

1. What vehicles use the Acura B18C1 engine?

The B18C1 was originally installed in the 1994–2001 US-market Acura Integra GS-R, including DC2 coupe and DB8 sedan applications.

2. How much horsepower does a B18C1 engine produce?

The factory-rated B18C1 produces approximately 170 horsepower at 7,600 rpm.

3. Is the B18C1 a VTEC engine?

Yes. It features Honda's DOHC VTEC technology with a 16-valve cylinder head.

4. Is the B18C1 a 1.8-liter engine?

Yes. Its exact factory displacement is 1,797 cc, commonly rounded to 1.8 liters.

5. Is the B18C1 naturally aspirated?

Yes. The original factory configuration is naturally aspirated and does not use a turbocharger or supercharger.

6. Can I install a B18C1 in a Honda Civic?

Potentially, yes. Certain Honda Civic models can accommodate B-series engine conversions, but installation may require compatible mounts, transmission, ECU, wiring, axles and other supporting components.

7. What is the difference between B18C1 and B18C5?

The B18C1 is associated with the Integra GS-R, while the B18C5 is associated with the Integra Type R. They have different factory performance specifications and should not be treated as identical engines.

Years / Generation

The B18C1 was used in the US-market Acura Integra GS-R during the third-generation Integra period.

The 1994–2001 model-year range is commonly associated with the US-market B18C1-equipped Integra GS-R. Verify the original engine code and model specification when purchasing an engine advertised as B18C1.