2021+ Mazda CX-30 Turbo 2.5L

Boost your 2021+ Mazda CX-30's performance with the CorkSport Catted Downpipe for models equipped with a 2.5T engine. The downpipe offers a nice growl and increased power potential you'll love. The downpipe has a removable cast, Stainless Steel Bellmouth, and 80mm piping to provide a smooth airflow that makes it easier to install. Pair this with the 80mm cat-back exhaust to make a turbo-back exhaust system!

The V2 downpipe comes with an updated high-flow catalytic converter. The previous version used a Euro 3 300cel catalyst with mixed results with check engine lights (CELs). Our new and improved V2 unit uses a Euro 6 500cel catalyst. The enhanced design provided the best emissions control and minimized the risk of a check engine light on the CX-30. Read the blog post below for more information about the new design.

Read The BlogThe Wait is Over for the Best 2021+ Mazda Turbo Downpipe V2

The CorkSport Advantage

Fitment:

The CorkSport Downpipe was designed with 3D scan technology and CAD rendering to fit like OEM. The two-piece modular piping and bellmouth perfectly fit the turbocharger, OEM, and aftermarket exhaust systems. The modular design allows for easy installation no matter what modifications you add.

High Flow Catalyst:

The CS downpipe for the CX-30 includes a Euro 6 500 high-flow catalyst. The choice was clear to us with the need to keep emissions and CELs in check without losing the performance.

The Euro 6 is the emissions standard for Europe and is stricter than the USA. Although the 500cel is denser than a typical high-flow cat, we increased the diameter to 5" to prevent airflow restrictions. The difference between the V1 300cel and 500cel showed no power difference in our testing and did not throw a check engine light in our testing.

While we cannot guarantee NO CELs since we cannot replicate all possible climates, driving conditions, local fuels, and/or elevations, we have ~10 months and 14,000 miles of driving on this catalyst without any issues. Since releasing the downpipe in 2024, we have not received reports from customers experiencing a check engine light!

Mazda CX-30 Turbo performance catted downpipe upgrade

Materials:

Each CorkSport downpipe uses high-quality materials and manufacturing processes. At the turbo, a cast 304 stainless steel bellmouth is used for its durability and flexibility in manufacturing.

The cast bellmouth provides a smooth transition from turbo to piping, with 80mm piping providing enough flow to efficiently support 500+ HP, giving plenty of headroom for tuning and future upgrades, such as our FUTURE Drop-in Turbo UPGRADE.

The 65mm OEM piping is replaced by 80mm mandrel bent and TIG welded piping, again for long-lasting durability. The sections are joined together using CNC machined v-band flanges for a leak-free seal.

Hardware and Accessories:

The CS Downpipe comes with all the necessary hardware for installation. Since the OEM Turbo studs are very long and prone to breaking, we've included new high-strength studs and crimp nuts to support your installation.

Connecting to the mid-pipe is also easy with a Remflex Gasket and all-new hardware. A V-band clamp is also included to secure the connection between the top and bottom halves of the downpipe and offers an easier installation process.

As a bonus, we've even included a custom heat shield to protect surrounding engine bay components!

Power Potential

Limited Tune* vs Factory Stock Tune

Green = wTQ & Blue = wHP on all Graphs

The CorkSport downpipe offers bonus power potential for your CX30! By eliminating the poorly bent piping of the OEM downpipe and the restrictive catalytic converter, the CorkSport downpipe offers minimal restrictions and greater peak flow with a high-flow CAT.

The dyno graph compares a vehicle with CS Short Ram Intake (SRI), Turbo Inlet Pipe (TIP), 80mm Cat Back Exhaust (CBE), w/CS Downpipe running a "limited" tune* vs the vehicle running the same bolt-on parts w/the stock downpipe and the factory ECU tune.

*This is not a full custom tune, nor does it indicate final HP/TQ gains expected. This limited/rudimentary tune only removed the torque limiter and raised the load limiters. Due to the increased flow of a full bolt-on car, this was necessary to prevent the vehicle from bouncing off the limiters set by the factory tune, as seen in the dyno graph below.

Factory Stock Tune Comparison

The dyno graph shows a direct comparison between an OEM and CS downpipe, utilizing a stock tune and the following CorkSport parts installed; Short Ram Intake (SRI), Turbo Inlet Pipe (TIP), 80mm Cat Back Exhaust (CBE).

The CS downpipe, due to its increased flow, shows both wHP and wTQ gains over the OEM downpipe starting at ~2300 RPM until the factory tune's airflow/torque limiters start pulling back HP/TQ.

With the CS downpipe installed, limiters start to pull HP/TQ at approximately 4200 RPM, which explains the sharp downturn in HP/TQ. The ECU tries to feed the power back in but it hits the limiter again, which repeats and repeats, explaining the oscillations above ~4300 RPM.

The OEM downpipe suffers from this effect as well, but it's not nearly as aggressive or severe since OEM downpipe's flow is much more restrictive compared to the improved flow of the CS downpipe. Installing a CS Downpipe on a vehicle running fewer mods or more restrictive mods, such as the OEM or CS 63.5mm CBE may still hit the limiters, but will be more reflective of the OEM dyno run.

With the CS Downpipe installed, coupled with the mods outlined above, and running the stock tune, the maximum HP/TQ improvements are at ~4000 RPM and highlight gains of ~18wHP and ~24wTQ.

Factory Stock Tune vs Custom DISI Tune

The dyno comparison shows the difference between a factory stock tune and a custom DISI tune after installing the same CorkSport parts; Short Ram Intake (SRI), Turbo Inlet Pipe (TIP), 80mm Cat Back Exhaust (CBE), and CS Downpipe (DP).

The DISI tune shows significant gains across the rev range and does not have the oscillation present with the OEM tune. This graph is the best comparison why we recommend that customers get a tune after downpipe install.

This DISI tune is from late 2023, and further tune development has been made since. This specific run produced 268.9wHP @ 4480 RPM and 355.6 wTQ @ 2159 RPM.

Limited Tune* vs Custom DISI Tune

The dyno graph shows a comparison between the original limited/rudimentary tune (only removing the torque limiter & raising the load limiters) compared to the same 2023 DISI tune from the graph directly above.

In each case, the car is running the full CorkSport catalog of parts; Short Ram Intake (SRI), Turbo Inlet Pipe (TIP), 80mm Cat Back Exhaust (CBE), and CS Downpipe (DP).

The DISI tune shows significant gains between the 2000-3000 RPM range and gains above the 4100 RPM threshold. Gains are likely to improve with a 2024 DISI tune, as tuning for this platform continues to evolve.

Off road/motorsport use only.
A check engine light (CEL) may be illuminated on your vehicle as a result of installation.
- This warning is primarily for legal reasons as we cannot replicate every possible driving condition; climate, local fuels, and/or elevation.
- We have NO recorded CELs during our testing; ~10 months and 14,000 miles of driving on this catalyst without any issues.
- Returns/product exchanges will not be accepted due to a CEL.
Ensure car is completely cool before working on the exhaust system to prevent injury.
An ECU tune is recommended after installation to take full advantage of the high flow of the downpipe.
While you can run the car without a tune, and it will operate without damage, depending on your mod list you may experience some surging or “hiccups”, especially at wide-open throttle. This is simply the car hitting airflow & torque limits in the ECU and pulling power back.
For Dyno purposes, a limited* tune was installed due to the nature of surging/ECU limitations present with a stock tune, in order to show the power potential of the product while paired with our SRI, TIP, and CS CBE. Individual results may vary.

Additional Features

Vehicle Fitment: 2021+ Mazda CX30 Turbo, running stock, CS 63.5mm, or CS 80mm Cat Back Exhaust.
Developed in America: Designed, tested, and validated in Vancouver, Washington, in the Pacific Northwest.
CorkSport Service and Support: Receive a 2-year warranty, full-color installation instructions, all of the needed installation hardware, and knowledgeable telephone installation support.