Catback Exhaust for Acura Integra (2022-2025) 1.5L Engine

Resonated T304 Stainless Catback Exhaust for 2022-2025 Acura Integra (L15CA/DE4)

What it Does: Replaces the restrictive factory exhaust system with mandrel-bent T304 stainless steel piping and a resonated mid-pipe to reduce backpressure and improve turbocharger spool-up without cabin drone.

The Stock Integra Exhaust Restriction

The OEM exhaust system on the DE4 Integra is engineered for maximum sound suppression, utilizing heavy, multi-chambered mufflers and necked-down piping diameters. This design creates significant backpressure, which forces the L15CA turbocharger to work harder to evacuate spent gases, leading to higher exhaust gas temperatures (EGTs) and slower boost response. Additionally, the factory mild steel construction is prone to oxidation over time, and the muted tone fails to provide the mechanical feedback necessary for a performance-oriented driving experience. These flow limitations become even more pronounced on vehicles running increased boost pressures or aftermarket ECU calibrations.

The Engineering Solution

This catback system provides a high-flow path using premium T304 stainless steel, offering superior resistance to heat-cycle fatigue and road salt corrosion. The 3-piece configuration features precision mandrel-bent piping to ensure a constant inner diameter through every bend, minimizing turbulence and maintaining high exhaust gas velocity. A specifically tuned resonated mid-pipe is integrated to filter out high-frequency rasp and low-end drone, delivering a refined yet aggressive note suitable for daily driving. Each joint is hand TIG-welded for maximum structural integrity, and the system terminates in dual 4-inch burnt slant-cut tips. By reducing pumping losses, this system allows the small-displacement turbo engine to breathe more efficiently throughout the powerband.

Technical Specifications

Compatibility

• 2022-2025 Honda Civic Si FE1 1.5T
• 2022-2025 Acura Integra 1.5T DE4

The Acura Performance Standard

This exhaust system is engineered for the enthusiast who demands a balance of daily-drivable civility and track-ready flow. By optimizing the exhaust path for the L15CA engine's forced induction system, it provides the necessary airflow headroom for tuned applications while maintaining the premium fit and mechanical resonance expected of the DE4 chassis.