Cobb 07-13 Mazdaspeed 3 Gesi Catted 3in Downpipe (cobb571212)

Regular price $875.00 USD Sale price $875.00 USD Regular price $875.00 USD
In Stock!
SKU: cobb571212
Product Description

Our GESi Catted 3" Downpipe is the greatest all-around alternative on the market, and it took a lot of technical effort to develop. Let's start with the 304 stainless steel investment-cast turbine exit that was created using CAD technology for long-lasting corrosion resistance and minimal heat transmission to the engine compartment. The outlet flange's bellmouth design makes the most of the Mazdaspeed3's engine bay's limited space by seamlessly merging the turbine outlet and wastegate gases. To accommodate the default O2 sensor and provide the option for extra sensor installation to meet individual demands, the outlet additionally includes two O2 sensor bungs.

The stainless steel flex portion, which is further downstream, is internally lined to safeguard the steel braiding while ensuring ideal exhaust flow. Another crucial location is the flex section's placement right before the first exhaust hanger. By doing this, the impact of engine movement on the cat, flanges, and other exhaust parts is reduced. Additionally, the usage of the factory's donut flange design enables compatibility with any cat-back exhaust made to fit the factory's cat section. Considerable effort was put into designing a flow path with the fewest number of directional changes and minimal degrees of bend in order to eliminate restrictions that have been found in the stock system. The COBB 3" Downpipe is one of the key upgrades for the MAZDASPEED3 to unleash a significant amount of torque hidden away within the MZR 2.3 DISI Turbo engine from the factory.


    This part is in the process of external testing with the EO process ongoing.
  • Installation of any aftermarket Mazdaspeed3 downpipe requires an upgraded Cam Shaft Driven Fuel Pump (CDFP) and tuning to ensure adequate fuel supply and safe engine performance.
  • This downpipe requires tuning changes. COBB offers OTS Map support for some vehicles.


  • Mazdaspeed 3 (2007, 2008, 2009, 2010, 2011, 2012, 2013)


  • CAD Designed Cast Turbo Outlet for Maximum Flow
  • 300 Cell GESi Catalytic Converter
  • Three O2 Bungs for Factory & Aftermarket Sensors
  • Factory Location of Flex Section Eliminates Stresses
  • Utilizes Stock Donut Gasket for Optimal Sealing & Long Life

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck items, will require up to 7 business days to ship due to size. i.e. hoods, trunks, body kits, etc.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers or apartment numbers will require signature if valued over $200.

All international orders outside of the USA are subject to duties and taxes per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

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