Cat-Back Muffler Piping Exhaust Set for Acura Integra (1990-1993) 1.8L Engine

Unleash the B18A1: High-Flow Cat-Back Exhaust System for 1990-1993 Acura Integra

Who It’s For: Engineered for 1990-1993 Acura Integra owners running the legendary B18A1 powerplant who are tired of the stock sluggishness and restrictive OEM piping.

The Symptom: The factory exhaust on the second-generation Integra was designed for 1990s noise compliance, not peak volumetric efficiency. It uses narrow-diameter piping and a multi-baffled muffler that creates significant backpressure, effectively choking the B18A1 engine at higher RPMs. This restriction results in a dull throttle feel and prevents the engine from scavenging exhaust gases effectively, leaving your Integra feeling sluggish during spirited driving or highway passing maneuvers.

The Engineering Fix: This system replaces those restrictive factory components with a high-flow cat-back setup featuring mandrel-bent piping. Unlike standard crush-bending, mandrel bending maintains a constant internal diameter through every curve, ensuring laminar flow and reducing turbulence. By optimizing the exhaust velocity and reducing parasitic backpressure, we allow the cylinders to clear spent gases faster, resulting in increased oxygen intake on the following stroke, sharper throttle snap, and a classic DOHC induction growl.

Why Mechanics Choose This Kit

• [B-Series Power Band]: Specifically tuned to improve mid-range torque and high-end horsepower for the B18A1 engine by reducing exhaust gas exit resistance.
• [Tuned Acoustics]: Provides a deep, resonant exhaust note that highlights the mechanical character of the Acura DOHC valvetrain without the high-pitched rasp or interior drone.
• [Precision Fitment]: Designed to follow the complex chassis path of the DA9/DB1 platform, ensuring proper clearance for the rear trailing arms and fuel tank heat shields.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 1990 Acura Integra RS, LS, GS (Hatchback/Sedan)
• 1991 Acura Integra RS, LS, GS (Hatchback/Sedan)
• 1992 Acura Integra RS, LS, GS (Hatchback/Sedan)
• 1993 Acura Integra RS, LS, GS (Hatchback/Sedan)

Interchange Part Numbers:

B18-CB-9293-SET, CATBACK-INTEGRA-92-93

The Performance Promise

Buy with confidence. This system is the preferred choice for tuners looking to restore the "Golden Era" feel of their second-gen Integra. Backed by real automotive experts and fast shipping.

Common Questions

Will this cat-back exhaust fit my 1990-1993 Acura Integra 1.8L?
Yes, this cat-back exhaust system is built for the second-generation 1990-1993 Acura Integra equipped with the 1.8L B18A1 DOHC 4-cylinder engine, covering RS, LS, and GS models.

Does this fit the 1992-1993 Acura Integra GS-R 1.7L?
This system is specifically configured for the 1.8L B18A1 DOHC engine found in the RS, LS, and GS trims.

What is included in the box?
The kit includes the muffler section, mid-piping, resonator section, and installation hardware.

How does mandrel-bent piping help performance on the B18A1?
Mandrel bending keeps a constant internal pipe diameter through every curve rather than pinching at the bends, which reduces backpressure and helps the 1.8L DOHC engine clear exhaust gases more freely for sharper throttle response.

Is this exhaust routed to clear the factory rear suspension and heat shields?
Yes, the piping follows the factory second-generation Integra underbody routing to maintain proper clearance around the rear trailing arms and fuel tank heat shields.