Mazda 3 hi flow catalytic converter

The two most common used aftermarket cats are: Ceramic substrate and metallic substrate catalytic converters. In Australia, late model cars onward are required to have a second O2 sensor located immediately after the factory cat. We found that none of the latter the one without cats works so far, while the former one with cats work on some cars, but not all of them.

After much testing we concluded that the results will depend on how good the small cats inside the adaptor are, and also the sensitivity of the sensor. Hi-flow aftermarket cats have shown to produce significant power gain, especially for high-end performance applications. However this is at the cost of less emission control over the factory stock units, so it only suitable and is advisable for race and off road applications. The higher flowing the cat is, the higher the sound level will be.

When planning a new exhaust system, the type of cats should be considered as an important factor that can affect the exhaust sound characteristics. As an example, if your aftermarket cat-back system is too quiet and you are plan to upgrade the system for more noise, you should always try the hi-flow cat first before chopping and changing the mufflers to a louder one normally the smaller body size mufflers are louder than the large body ones.

This may save you a lot of money, time and hassle. The reverse can also be applied here for a quieting a system at the cost of some power and flow. Why buy one? A: All stock catalytic converters are restrictive when it comes to exhaust flow, and they essentially place a choke hold on performance. The hi-flow catalytic converters on the market today have a higher flow capacity than factory units.

Still able to pass emissions and gain horsepower, how can you go wrong with a hi-flow catalytic converter? Q: How do you install a hi-flow catalytic converter? A: There are two kinds of catalytic converters. The first are direct fit converters no welding required which have all necessary flanges and oxygen sensors just like the original equipment catalytic converters.

There are also universal fit catalytic converters that are designed to be welded or clamped in place. Universal fit converters have the same flow characteristics as direct fit models with the same inlet and outlet diameter. Filter Your Results. Catalytic Converters MagnaFlow Choose Your Vehicle:. We explain the difference between a direct-fit bolt-on catalytic converter and a universal weld-on catalytic converter.

We also go over the benefits of getting a new cat, and we even do an installation to show what's involved. Customer Support. Contact Us. Returns Policy. Terms of Service. About Us. About Andy's. In The Media. Andy's Parts Smarts. Andy's Auto Sport TV.

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