Catylitic Converter

[Motorsports]

Hey guys, The catylitic converter in my car is broken up inside. I was thinking about replacing it with a highflow aftermarket cat. A friend of mine just told me to run a straight pipe. My car already has a Scorpion exhaust. Should i get a OEM cat. What do you guys think?

[nando]

FYI last time I checked, a new OEM cat from BMW is well over $1000. I'd be looking at aftermarket or a resonator. a straight pipe is going to make it much louder.

[der affe]

i just put a magnaflow 2 1/4" dual in and dual out on my car last month to replace the rattling aftermarket cat. it sounds NICE!!!!!

are you still running duals or did you go to a single.

i always though that regular aftermarket cats were junk flow wise and when i switched the muffler out, it was confirmed!

i had to totally re tune the car after. the sound is still pretty quiet too. you can find the mufflers for around $100 and they DO FIT in the space where the cat section was.

you can also do it cheaper with a pair of glass packs too. it is a little buzzy though.

i have the old section with a pair of 2 1/4 " glass packs that i would let go cheap. the only problem is the muffler shop hacks that put on the cat cut off my stock flanges. mad hatter mufflers sucks!

i got better MPG, better acceleration, and a nice tone with out the rattle when i was done

[daniel]

doesnt NY have state inspections? you won't be able to have a car without a cat there if they do. just get a high flow aftermarket cat.

[ejnight]

+1

[der affe]

duh....flanges my BROTHA!
bolt in the cat for inspection, swap out the muffler the reat of the time.

your cat will never wear out, and you can run a flow clogging aftermarket for the short time you need to.

[Motorsports]

Am not too concern about state inspections. There are ways around that, Am more concern about the car running the way it should, and i dont want the car running any louder. I like the sound of it. Do you guys think that an aftermarket cat would do the same job as the original.

[der affe]

no. if you are dead set on the cat get a high flow aftermarket one.
the reason i did the muffler instead of straight pipes is i actually liked the way it sounded with the cat, but with a 292 deg cam, it eats up the aftermarket cat and it starts to rattle in 4-6 months.

trust me, you will like the sound with the magnaflow muffler!

[kamotors]

i have a catco high flow cat and its sounds very nice, i passed smog with flying colors.

[der affe]

part number 11378. magnaflow MUFFLER!!!

here is a link so you can see the dimensions

http://www.magnaflow.com/02product/universalsatins.asp?shape=Oval

an aftermarket cat SHOULD clean up the exhaust gases as well as a stock one. it will not flow like one. the aftermarket cat will not stay good as long either because it has less honeycomb and platinum in it

[jflip2002]

.

[der affe]

you should do this too then!

[jflip2002]

.

[der affe]

you can just delete the code like on GM's right?

it sounds really good with the mufflers in place of the cat/cats

[Rennsport]

if you have a connections for a die grinder and welder, cut the fucker open (from the top side) break all of the shit out of it, weld it back together.

It will now just act as a resignater.

Plus Side:
high-flow, no rattling, appearance of a cat, free.

Down Side:
a touch louder, illegal (but you can just say that is how it was when you bought it and you didn't know about it.)