mac9968

Hello all, I wanted to ask about experiances with Catalytic Converter replacements (other than Toyota). I know that Flowmaster makes aftermarket CATs, any experiances you could share. What is the impact on the 4-runner if the CAT is removed. The 95 that I purchased has a rusted out muffler and Catalytic converter, you guessed it.. headgaskit issues. It is all back together with the expection of muffler and CAT.

Grunnen

I ended up cutting mine off and the improvement was amazing.

Jay351

You will only notice a difference if your cat was clogged up.. And you didnt touch the stock exhaust.

I run a magnaflow universal cat. I pass smog every year too (I gotta go tomorrow lol!). If you are replacing it, its only a few more bucks to go to a local muffler shop and get a catback bent up. Then you can slightly increase the pipe dia, and add a muffler of your choice.

Note:

The oem toyota cat has platinum inside. thats why all the crackheads steal em.
You can sell it to the scrapper for some good coin, I havnt checked the going scrap rates so..... Before everything went to hell they used to fetch a good $100..

olharleyman

MAGNAFLOW CATALYTIC CONVERTER HI FLOW 94006
I bought this one from a few suggestions from guy's here running them , it's going on my 22re with a header and Flow Master 40 muffler.

Grunnen

tried to sell mine yesterday and 2 different places offered me $10. i guess ill wait until the market goes up again.

desertcamper67

I took mine off and had a straight pipe made to bolt in place. It sounded like a stupid ricer and I put it back on a couple days later. What a waste of time and money. No improvement unless you like to sound like you are racing when backing out of your driveway.

Jay351

Heh, my truck just passed with flying colours!! Actually better than last year, except the nox was a tad higher...

runnin on regular 87 octane chevron as always!

mac9968

Thanks all, bottom line here is that muffer a plus, but absolutely dont need a CAT, correct?

Jay351

No, but it won't run as nice as with a cat and the exhaust will stink.

Cats keep exhaust hot, hot exhaust flows faster... do the math.

abecedarian

not using a cat means a potentially smaller size pipe could be used which in turn would keep velocity up.

Jay351

Just run a cat. Its better for everyone.

ovrrdrive

My truck runs great without a cat...

Grunnen

My straight pipe is 2" instead of 2 1/8" I figured it would help with the back pressure.

The performace increase was great and it isnt that much louder just more of a throaty sound. It does smell terrible tho.

New cat/muffler when I redo my exhaust to 2 1/4"

kevinGTB1

Hello everyone, thanks for the info

kevinGTB1

Hope this will help you guys regarding this matter,

I have the Magnaflow Catalytic Converter 46208, I purchased it direct here. Magnaflow Catalytic Converter 46208, I have no comlaints with this cat I passed emissions and got not engine code errors so Im happy. You would not believe what the dealer wanted to charge me for this thing. Definately buy online and put it on your self its way cheaper.

shore.runner

hahahah this is true
I took out my cat with the LCE exhaust and it is too ricy. If the noise dies down ill probably leave it the way it is but if it doesnt im going to add one