Cold Air Intake for Acura Integra (1990-1993) 1.8L Engine

High-Flow Cold Air Intake for 1990-1993 Acura Integra (B18A1/DA9)

What it Does: Replaces the restrictive factory air box and pleated paper filter with a high-velocity T-6061 aluminum induction system to lower intake temperatures and improve throttle response.

The Stock Integra Weakness

The OEM air induction system on the second-generation Integra was engineered primarily for cabin acoustics rather than volumetric efficiency. The factory plastic air box and convoluted rubber bellows create significant internal turbulence, particularly as the B18A1 engine approaches its 6,300 RPM power band. Furthermore, the stock configuration is highly susceptible to heat soak; as under-hood temperatures rise, the plastic housing traps stagnant air, significantly reducing air density. This thermal bottleneck results in "mushy" throttle response and a measurable loss of torque during spirited driving or in high-ambient-temperature conditions where airflow is restricted by the narrow factory snorkel.

The Engineering Solution

This cold air intake system solves these flow restrictions by utilizing mandrel-bent, industrial-grade T-6061 billet aluminum piping. The smooth, consistent interior diameter minimizes skin friction, promoting a laminar flow profile that increases the mass of air reaching the B-series intake manifold. The aluminum construction is finished with a scratch-resistant coating that acts as a thermal barrier. The kit includes a high-flow, washable micro-cotton cone filter which provides significantly more surface area than a standard panel filter, ensuring high filtration efficiency without sacrificing air velocity. By relocating the intake point, the system draws a denser, oxygen-rich charge, directly improving combustion efficiency and top-end power delivery.

Technical Specifications

Compatibility

• 1990-1993 Acura Integra DA9 (2-Door)
• 1990-1993 Acura Integra DB1 (4-Door)
• Fits 1.8L Non-VTEC B18A1 Engines

The Acura JDM Standard

The B-series engine is a cornerstone of JDM performance history. This intake provides the aggressive induction sound and high-RPM breathability that the B18A1 requires to perform its best, delivering a crisp mechanical note and the thermal management necessary for consistent performance on the street or the track.