Thinking about doing a mod to my honda I just bought. Want to make it feel and sound stronger. Would adding a Magna Flow Catalytic Converter do anything in that regard if the rest of the exhaust is stock? Would any performance gains be achieved?

I'm not sure I want to invest in a cat back. I worry about the drone, though I used to drive a Z71 with flowmaster and it was alright just a little noisey sometimes. But I don't want it real loud, just a little stronger feeling.

Would appreciate your thoughts, thanks.

 

I should add, will be doing SRI. Not sure which brand they all seem the same. This would be in addition to the SRI. Rains to much for CAI around my area.

 

Replacing the cat only, won't make that much of a difference, unless your current cat is clogged up.

 

The stock cat works great and makes minimal restriction at stock/bolt on power levels. I dumped with a stock f22 cat on an h22 and then with a test pipe and saw a loss of one horse power.


Posted from Honda-tech.com App for Android

 

If you want a cat back get one.....just not a dronemaster. Most street intended Honda exhausts have been designed with resonators and minimal to zero drone.


Posted from Honda-tech.com App for Android

 

A cat back isn't totally off the table yet. Anyone have experience with them on a Honda v6? I've read where it's more droney on a 4 cylinder but you never know who knows what they are talking about on the internets.

And I don't want to spend a bunch of money on a cat back only to then restrict the power back to stock to cancel out noise. Magnaflow is the brand I researched the most. Seems like they have quality product with people like me in mind. I don't want to draw a bunch of attention. It annoys me when a vehicle is too loud. But I do love a good rumble sound and I loved the way accelerating felt in my truck.

 

It's hard to compare exhaust sounds between a GM 4.3L / 6.0L V8 to a Honda 3.0L V6. You're not going to get that same rumble out of a 3.0L Honda V6.

Try searching for GReddy EVO sound bites, that's the best OTS V6 Accord exhaust I have heard. Besides that there is going with a custom fab 2.5" exhuast. With a Magnaflow cat, resonator and mufflers. A guy around here had a Magnaflow setup. That was as close to a Domestic V8 I have heard from an import V6.

 

Magnaflow, in my experience, tends to be very loud. If I was going to go with Magnaflow i would make sure to run nice big resonators. In the past 15 years I have heard some really loud nasty droning magnaflow set ups.
As Ghost said greddy makes a great product. Apex'i and HKS also come to mind. Typically an aftermarket exhaust will have straight through perforated core mufflers (no chambers or louvered cores), larger piping and better bends. They are louder than stock, and flow better than stock...and usually the ones that drone will be designed for race applications not street. You will not find many (if any( race exhausts for accord v8s...

 

Yeah, I forgot to mention to stay away from the import stuff made by Magnaflow. it is usually a lot louder than stock. the kit I bought for my Mazda actually removed the resonator from the system. It is louder but I don't mind it.

The local guy used universal fit resonators and chambered mufflers designed for a V8 configuration. Same parts that I will be using in my exhaust.

 

Is there any special programming that needs to be performed on the computer after doing stuff like this?

The guy at the exhaust shop said no, but it's a new shop to me and I'm new to Honda so I have no idea if I can trust what he said. His shop might not work on Honda alot.

 

I replaced my converter with a Magnaflow. Just a bolt on job.

 

No programming needed, the alteration in flow is not so much that the stock computer can not compensate. They do not choke the engines off in these cars the easy they do to emphasize torque the way they do in full size trucks.


Posted from Honda-tech.com App for Android

 

No external programming required. However, it is always best to reset your cars ECU/computer when changing the flow of intake air or exhaust gases. This will allow the ECU to learn the changes faster.

Disconnect your battery for 30 seconds to a minute. This will reset the ECU's long term fuel trims. After connecting the battery, before you start it up, make sure all of the electrical components are shut off. I.E. Radio, heater/AC blower, headlights. Once you start the engine do not touch the gas peddle for a couple minutes. Let the car idle until it gets up to temp. Then you can turn everything on and let it idle for a few more minutes with everything turned on.

Doing this will help set the base fuel trims and you will be on your way to the ECU learning the new flow of things.

 

Thank you Ghost Lion. I decided to do this in stages. I will install the SRI (already ordered) and drive it for a while and keep considering options on the exhaust upgrade. Found a good shop locally and now I am better informed thanks to you and this forum.

 

Drive it for a while with the SRI before you do anything to the exhaust. On my 02 v6 it made it sound a little more aggressive, you'll like it. You can hear a slight whistle sound at idle and real low rpms but when you hit vtec it gets real nice sounding.
Then start looking at exhausts.
A header will add a little rumble to it but not as loud or noticeable as an exhaust.
If your cat still works okay get a cat back first then replace it with a free flowing one when it goes bad.
Magnaflows sound real good on the v6's, a lot deeper and meaner and you'll hear a big difference and feel a good gain on power with the intake, headers and exhaust combined..