What is a primary cat delete?

To answer: with primary cat delete, if you don’t do a tune, you have tq lost at lot RPM due to lack of back pressure. however, with a correct tune (like one from OE Tuning), this problem is corrected and you are able to create more power. Furthermore, deleting the primary cats will 100% give you a CEL.

Will a secondary cat delete turn on check engine light?

The secondary cats are unmonitored so you will not get a check engine light removing them.

What are primary and secondary cats?

Well everyone and every company has tlaked about the “primary” cats (cats closest to headers) as the most restrictive however take a look at this official bmw m3 education manual and you will see that the “primary” cats are actually the non-obstructing more flowing metallic ones and the “secondaries” are the main cats.

Do Cat deletes void warranty?

Removing the cats (primary or secondary) can void drivetrain warranty. Whether or not a dealership acts upon this will depend on all sorts of variables, including the situation at hand. visually seen any aftermarket products or not.

Will a secondary cat delete pass emissions?

With the secondary cats removed you should still be able to pass a smog sniffer test. The primary cats in the downpipes are where 95% of the reaction is occurring. The secondary cats are so far back on the exhaust stream that they would do virtually nothing during during cold start.

What are secondary cats?

The secondary cats catalyze any compounds not processed by the primary cats on cold start up when catalytic conversion of the primary cats is not at maximum efficiency. Yes their role is less, but they do indeed do have an effect on overall tailpipe emissions.

How many cats does e92 m3 have?

It is a fully stainless steel piece and features a pair of powerful 200 Cell Sports Cats built into the centre section. This provides power gains and a more aggressive sound compared to the original OEM cats.

Will removing cat increase mpg?

Removing a catalytic converter will not improve MPG. However, replacing an old or clogged one will. Catalytic converters do not affect gas mileage unless they are not working correctly, so removing one will not make a difference unless it wasn’t working correctly, to begin with.

Is a secondary cat delete worth it?

I’ll tell you this, like most people have said the secondary cat delete will give you just a little more sound. Nothing crazy, nothing completely noticeable. If that’s what you’re looking for, go for it. But if you’re looking for something that will be more noticeable, you might wanna try a different route.

Should I delete my secondary cat?

With the stock exhaust, the secondary cats or resonators aren’t what eliminates drone, it’s the flaps. If they leave the flaps alone, deleting the secondary cats will just make the car a bit louder without drone, more so in sport and sport+.

How many cats can you have on N54?

BMW E60 models with an N54 (turbocharged) engine utilize two catalytic converters, one mounted to the outlet of each turbocharger. Catalytic converter replacement is a big job and requires removing the complete exhaust system and many other components. Read through the procedure thoroughly before beginning.

How many cats are on a bmw 335i?

same as the 335i. same as the 335i. The M4 has two primary cats and two secondary.