Catalytic converter removed

This video shows the difference removing the catalytic converter makes on exhaust noise. In the previous video, the noise is loud enough to hear, but not loud enough to be annoying. This is annoying in the cab. The straight pipe is only temporary until the new cat is installed. The original cat worked, but the core had been jostled free and made a lot of noise, which is why it came out.

After taking the truck out for a test run, the performance gains/losses were neglible at best.

Category:

Autos & Vehicles

Tags:

• no
• cat
• Dakota
• straight
• pipe

[averageman67]

Did it sound good? Even at high rpms? I have 1 too with a glasspack and im about to cut the cat off to make it louder please let me know

[redfury111]

@averageman67 It sounded alright, but at highway speeds ( about 2000rpm ) it would "thrum" cyclically. When you are commuting 25 miles with that, it gets old fast. I replaced the entire exhaust system back to stock and didn't even notice a difference it mileage or power to be honest.

[redfury111]

For those interested, the transmission on the truck is on the way out at 202k..sounds like the planetary is giving up the ghost. The truck still runs strong as ever, runs through the gears just fine. Just every once and a while, you can hear a piece of metal singing like a pissed off violin as it gets chewed through whatever is eating it up. Not sure if I'm going to fix the trans or sell it as is. With 202k on it, it's not worth much to me as I've already replaced it with an Astro.

[redfury111]

I've already replaced the entire exhaust system back to stock including a new converter...I was sick of hearing the noise everyday on my 30 minute commute.

No emissions testing in MN, and the backpressure issue wasn't noticeable up or down as far as power was concerned. Then again, the truck just hit 200k...still has strong ponies left in it.

[jervy007]

a lot of smoke coming out.

[redfury111]

@jervy007 It was cold that morning and it was the first time I had started it that day, hence the smoke.

[k33m0]

lol I did that with my Civic, I used a test pipe. I did this only when I went to drag races. It was a pipe with a Cat shell.

[2fast4u324]

i need to do this with my XJ jeep.

[randomvidz94]

@redfury111 why are all scrap or salvage stores people obsessed with the catalytic converters ? I was selling an old car and everyone one of them asked only two questions ( make sure to have the cars title and it comes with a complete catalytic converter ) , he wasn't worried about the engine or gear or how many miles i had . could you please explain ?

[greg81809]

@redfury111 sorry....... but it doesnt breath out the same amount the car breaths in, then your ganna lose alot of power by straight piping that bitch..... if i were u i would put it back to normal...... just letting you know..... not a good idea...plus the smog test is ganna fail.....

[lawnmowerTim]

@redfury111 so rev it so it blows if its cold

[MrGizmo757]

@blue6023 most factory made cars wont pass emissions test brand new. those kinds of test are just pointless. the only way around one when you fail one is to fill your exhaust up with water so the humid steam that comes out makes the sensor fail to read no2 works every time. :-)