Two Step Performance (TSP) High Volume Downpipe | 22+ Civic 1.5T & Si, 23+ Integra A-Spec

Fits:

• 2022+ Honda Civic trims with the 1.5T engine
• 2022+ Honda Civic Si
• 2023+ Acura Integra

No ECU calibration or tune is required — running this downpipe will NOT trigger a check engine light. Compatible with factory and most aftermarket front pipes, no adapter needed. Coating, heat-wrapping, or otherwise insulating these components voids the manufacturer's warranty.

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A downpipe upgrade is one of the most effective single mods for Honda's 1.5L turbo engine, and TSP's High Volume downpipe is built to promote optimal airflow with virtually no turbulence through the body. 304 stainless steel investment-cast ends are CNC pocketed for a smooth transition into a 4.5" OD, 400 CPSI GESi G-Sport catalytic converter rated for use up to 850hp — formulated specifically for small-displacement direct injection engines.

The wide cast inlet blends turbine outlet and wastegate gases smoothly to cut restriction, while the cast outlet tapers cleanly into your factory or aftermarket front pipe. Every component is fully back-purged on-site to withstand sustained high exhaust gas temperatures, and the kit ships with everything needed for a complete install.

Features

• 4.5" 400-cell EPA-compliant GESi G-Sport catalytic converter, rated for up to 850hp
• 304 stainless steel investment-cast ends, CNC pocketed
• Fully back-purged welds for high exhaust gas temperature resistance
• Increases power and exhaust flow throughout the powerband, decreases backpressure
• Kit includes: downpipe assembly, Grade 5 titanium hardware, lower gasket, O2 sensor harness extension