Wagner Tuning Honda Civic FK7 1.5VTec 300CPI Downpipe Kit

Wagner Tuning Honda Civic FK7 1.5 VTec 300CPSI Downpipe Kit

This downpipe kit from Wagner Tuning is designed specifically for the Honda Civic FK7 fitted with the 1.5 VTec turbocharged engine. It replaces the restrictive factory downpipe – the section of exhaust that connects directly to the turbocharger – with a free-flowing alternative that reduces back pressure and improves how quickly exhaust gases leave the engine. The result is sharper throttle response and better power and torque delivery across the rev range.

At the heart of the kit is a high-quality 300 CPSI racing metal catalytic converter. CPSI stands for “cells per square inch” and describes how densely packed the internal structure of the cat is. A higher cell count generally means better filtration, and this racing unit uses an EU6-compliant coating to maintain efficient exhaust gas purification while flowing far better than the standard catalyst.

Key Features and Specifications

• Material: cast stainless steel 1.4301 (SS304) – highly durable and corrosion resistant
• Pipe diameter: 85mm before the catalytic converter, 76mm after
• Includes a 76mm after-cat pipe for direct integration with the rest of the exhaust system
• Two lambda probe ports (oxygen sensor connections) retained for accurate emissions and engine management readings
• CAD-designed and flow-optimised for consistent, repeatable performance gains
• Direct OEM replacement fit – no cutting or modification required

Why Upgrade the Downpipe?

By improving exhaust flow from the turbo outlet, this downpipe helps lower the thermal load on the turbocharger itself. In simple terms, heat builds up more quickly when exhaust gases are restricted, so better flow helps keep temperatures in check. That is better for the long-term health of the turbo, and it also allows the engine to breathe more freely, supporting cleaner and more consistent performance.

Wagner Tuning manufacture this kit to precise tolerances, so installation is straightforward and the part fits exactly where the original would. It is a practical upgrade for owners looking to get more from their Civic FK7 without major modifications.

Important Notice – Catalytic Converter Use

Wagner Tuning catalytic converters are intended for use on standard, unmodified (OEM) vehicles for performance optimisation purposes. They are NOT suitable for use alongside ECU tuning, “burble” tunes, or any other engine management modifications.

Wagner Tuning accepts no responsibility for damage caused by a tuned or modified ECU, or by engine conditions (such as running rich or lean) that cause harm to the catalytic converter. Any warranty claim on a catalytic converter will require proof that the engine has been kept in standard, manufacturer-specified condition and proper working order.

The end user is solely responsible for ensuring that the use of a non-OEM catalytic converter is legal in their region.

Vehicle Fitment

This downpipe kit is designed to fit the Honda Civic FK7 with the 1.5 VTec turbocharged engine. Please use the vehicle lookup tool on this site or check the Vehicle Fitment tab for full details before ordering.