megan 3 inch exhaust cat back

[greyspyder117]

I just just this and i am looking for a cat to bolt up to the flanges 3 inch cat... Anybody got a link to the cat that will bolt up to this... 3inch

 

[_dOp_skyLINe]

check here
STM: DSM - EXHAUST | MANIFOLD | O2 HOUSING | DOWNPIPE | CAT-BACK | TURBO-BACK | HEATSHIELD | GASKET | FLANGE

 

[greyspyder117]

Thanks for the link... All i seen in that link was the weld on flanges... Is that the only way to get a catalytic conveter to bolt up to this exhaust sytem? I would not worry so much about the cat but emissions ...... Nobody makes a direct fit 3 inch cat for our cars? If i could ask another question if i were to go without a cat and just a downpipe do i just not put in the rear o2 sensor or do i still put it in... I really want to bolt up a cat so i don't have problems getting it to pass emissions but i hate buying stuff and #1 having to buy more stuff to make it work the way i want... #2 buying stuff and have to hack it up as soon as i get it.. thanks guys for the help in advance.

 

[dsmcrazy267]

A Megan downpipe deletes the cat but is a full 3 inch that would bolt up to you exhaust.

 

[EclipseTical]

As mentioned above, the MR dp is cat delete so if you want to run the MR one and must have a cat, your only option is to have someone cut the dp and weld in a universal 3" cat.

If you want a down pipe/cat combo that will bolt up without hacking, the only one i am aware of is this one from RRE

FYI, I used to run the RRE dp with their hi-flow cat and have nothing negative to say about it other than it wasn't "shiny" like the MR. I am currently running the MR [with no cat] since i got an awesome deal on it; i even passed emissions here in MD 2 weeks ago with it.

About your rear o2 question- you would still want to bolt up the o2 sensor ; the MR exhaust has a place for it. If it throws a CEL just go pick up a spark-plug fouler from NAPA or you can get this from STM or if you have ECMlink you can just turn off the CEL.

 

[guseclipse]

I run a 3" dp without cat. When I have to smog it I put the stock one back on. Its a pain but its only 4 bolts.