Two Step Performance Downpipe for 22+ Civic/23+ Integra 1.5T

If you want a legit Accord 1.5T downpipe upgrade that actually helps the 1.5L turbo breathe, this is it. The Two Step Performance High Efficiency Downpipe fits the 2018 Accord downpipe application, plus the Civic 1.5T exhaust upgrade for 2022+ and the 2023 Integra turbo downpipe for 2023+. We have run these exact parts on our own cars because freeing up the hot side is one of the fastest ways to improve response and power without turning your car into a raspy mess.

This High efficiency downpipe Honda option bolts up to the factory system and plays nice with most aftermarket exhausts too, so it works whether you want a mild Accord high efficiency exhaust setup or you are building a full system. You do not need a tune just to run it, but you will get the most out of it with software. If you plan to tune, look at Hondata FlashPro or KTuner V2.0. The big win here is you get the airflow without living with a Check Engine Light.

Two Step built this around real flow, not vibes. You get 304 stainless investment cast ends and CNC pocketing that keeps the transition clean into a 4.5 inch OD, 400 CPSI GESi G Sport catalytic converter. That cat matters if you want an Accord catalytic converter upgrade that still acts like a street car. It is formulated for small displacement direct injection engines, so you get strong flow without the sketchy smell and random drivability issues. The wide cast inlet blends turbine outlet and wastegate flow instead of smashing them together, and the cast outlet tapers smoothly into your front pipe. That is exactly what you want for 2022 Civic turbo efficiency and real Acura Integra exhaust improvement, not just more noise.

Expect more flow across the whole powerband, less backpressure, and cooler exhaust gas temps, especially once you turn the boost up. Two Step back purges the welds on site for heat tolerance and long term durability. Just be straight with yourself, if you coat it, wrap it, or insulate it and it cracks later, that is on you and it is not covered. The downpipe includes gaskets and stainless hardware, and it carries a 24 month warranty that covers welding.

If you are shopping a Civic 2022 high flow downpipe, an Integra aftermarket downpipe, or you want Integra catalytic converter performance without going full race pipe, this is a solid answer. It is the Integra high efficiency downpipe we keep recommending because it works on stock cars and it scales with mods. SKU: TSP-DWN-01-02. Also yes, people call it the Two Step Civic downpipe, and it does exactly what a downpipe should do. Your car pulls cleaner, spools easier, and stops feeling like it is breathing through a straw.