o2 sensors for cats

[B.P.O.D]

ok guys i just got 2 of these for my truck! http://www.performance-curve.com/index.asp?PageAction=VIEWPROD&ProdID=1180

2.5" Thunderbolt Metallic Catalytic Converter 415250
http://www.performance-curve.com/ProductImages/images/canmex/Thunderbolt1.jpg

now do i need new o2 sensors with these? i have no clue so any help will be greatly appreciated....

thanks ryan for the info on these cats!

[Marlin]

My memory tells me there is no o2 sensors in the factory.... oh wait, you're a 3.7, ummm, just re use you original o2 sensors my man!

[B.P.O.D]

ok cool... i gotta see what they look like. i have no clue. i was under my jeep today and saw the muffler and 2 cats but didn't see hte sensors

[robpp]

dude, you live in a police state - you have state emissions testing....

are you sure you will pass emissions with those things.....

[B.P.O.D]

rob im guessing it is ok i have no clue:( here is the description. sounds like it would be ok

Detailed Description Thunderbolt cat's are designed to give high performance in limited spaces. This high flow converter features a Metallic brick with 300 holes per square inch. This 100% EPA legal OBDII catalytic converter is designed for engine's up to 5.9L / 6000 lbs. (Not for use in California)

Part # - 415250
Length - 11"
Body - 4" Round
Inlet - 2.5"
Outlet - 2.5"
Brick Type - Metallic
Material - 409 Stainless Steel

[Matt]

Irf will just make it rain... he aint concerned with no emissions test!

But yeah, you may want to look into that, lol.

[B.P.O.D]

hehehe anyone know what i need to check:) lolol completely lost here

what does this mean:
"This 100% EPA legal OBDII catalytic converter is designed for engine's up to 5.9L / 6000 lbs. (Not for use in California)"

[robpp]

sorry i didnt mean to crap your thread but this seems more like an extreme mod than a basic one. IMO. if you install them and you throw a code, you will not pass an emission test that accesses your OBD port, as most do. some states dont have that stuff. but you do and you need to pass the e-test. I dont know anything about those cats or if they will work or not, im just saying if they dont, the downside is pretty big.....

hehehe anyone know what i need to check:) lolol completely lost here

what does this mean:
"This 100% EPA legal OBDII catalytic converter is designed for engine's up to 5.9L / 6000 lbs. (Not for use in California)"


that sounds like it will pass but I see a risk it may not. thats all.

[B.P.O.D]

roughage! well i wont install them till i know for sure. i am moving to PA and by north eastern pa i was told there isn't an emission's test. could be 100% wrong on that though

[B.P.O.D]

rob you aren't crapping on it at all bro! that's good info you're handing out

[FlyinRyan]

dude, you live in a police state - you have state emissions testing....

are you sure you will pass emissions with those things.....

sorry i didnt mean to crap your thread but this seems more like an extreme mod than a basic one. IMO. if you install them and you throw a code, you will not pass an emission test that accesses your OBD port, as most do. some states dont have that stuff. but you do and you need to pass the e-test. I dont know anything about those cats or if they will work or not, im just saying if they dont, the downside is pretty big.....




that sounds like it will pass but I see a risk it may not. thats all.


Theres no need for posts like these, since it appears that you 1) do not live in NJ, and 2) have no experience with this brand of converter, all the above commentary does is incite paranoia and anxiety.

Running a high-flow catalytic converter is not a big deal at all. I live in NJ, AND I have experience with this brand of converter- I run 3 of them on my WJ.

NJ inspections do NOT do a sniffer test for OBD2 (96 and newer) vehicles. Period. They will do a visual inspection (which means you must at least *appear* to run cats, in similiar positions to stock) and they will check your on board computer via the diagnostic computer . This essentially checks for check engine lights, aka CELs.

The ONLY case in which a hi flow cat (or hell, running no cat at all) would trigger a CEL is if there is a O2 sensor both before AND after the cat in question. Most hi-flow cats will not trigger a CEL in this scenario. Even if it did trigger a CEL....installing spark plug anti-foulers will more than likely prevent a CEL from being triggered. If the anti-foulers don't work, stuffing steel wool in it usually does.

Carry on.......

[Matt]

Ryan, I don't think rob was speaking outside of his knowledge-base... just trying to be sure Irf did the necessary research. Apparently he did (coming to you). He was just lookin' out. No harm, no foul.

[FlyinRyan]

Ryan, I don't think rob was speaking outside of his knowledge-base... just trying to be sure Irf did the necessary research. Apparently he did (coming to you). He was just lookin' out. No harm, no foul.

No harm no foul indeed. However, to call an emissions state like NJ a "police-state" and refer to swapping out catalytic converters for hi flow units as a "extreme mod" is a little rediculous. It would seem that he is talking at least partially out of his scope of knowledge. Not a big deal at all, but it's just not accurate in this particular case.

[Matt]

No harm no foul indeed. However, to call an emissions state like NJ a "police-state" and refer to swapping out catalytic converters for hi flow units as a "extreme mod" is a little rediculous. It would seem that he is talking at least partially out of his scope of knowledge. Not a big deal at all, but it's just not accurate in this particular case.

Yeah, I see your point.

[FlyinRyan]

Yeah, I see your point.

I had a feeling you would. :D

[B.P.O.D]

thanks for the help ryan. so you had no probs passing inspection with these cats in nj?

[FlyinRyan]

thanks for the help ryan. so you had no probs passing inspection with these cats in nj?

I haven't run through inspection with these ones, but my 2.5" Carsound hi-flow ceramic cat /Magnaflow muffler setup passed through NJ without issue.

Basically, so long as your exhaust doesn't wake up the dead due to noise, and if you have what looks like cats on your exhaust, you will be fine.

[B.P.O.D]

i checked under my truck and i have 4 o2 sensors and 2 cats. after discussing this with ryan (long discussion) i don't think i'll be getting these anymore. not really gaining any performance that i thought i would be gaining.

thanks everyone!

[FlyinRyan]

i checked under my truck and i have 4 o2 sensors and 2 cats. after discussing this with ryan (long discussion) i don't think i'll be getting these anymore. not really gaining any performance that i thought i would be gaining.

thanks everyone!

Irfan, there would be gains...but for your purposes, you're just better off replacing strictly the muffler.

[B.P.O.D]

^^^ yeah that's what i'm doing:)

[GCL06]

So...if I have a CAI, I'm going to be getting my TB ported and polished, I have an aftermarket muffler, and I'm looking for the best performance possible - is it a good idea to get a pair of these cats? I'd hate to spend so much only to get decreasing marginal returns when there's still a cat stuffing up the process. I'm concerned with o2 sensors but know nothing about them.

In addition, is there anything apart from what I've already mentioned that I could to to get any more out of my engine (hps and mpgs) without spending $2k on a supercharger? And please none of this "its a 3.7, why bother?" Why bother? Because this is the vehicle I'm going to be keeping for as long as it will run so I'd like to get the most out of what I've got.

[B.P.O.D]

bro i'm in the same boat as you. i'm sure you can tell since you've seen me ask all the questions that you are asking now...

you have the intake and muffler, get the ported TB and call it a day:) a tune is at least 350 plus a spare pcm....

[GCL06]

bro i'm in the same boat as you. i'm sure you can tell since you've seen me ask all the questions that you are asking now...

you have the intake and muffler, get the ported TB and call it a day:) a tune is at least 350 plus a spare pcm....

Wish this boat would stop leaking! Get close to finding another place to improve then get set back by possible complications. $70 for a set of cats isn't bad if it frees up a restriction point in the exhaust but idk how "high flow" the stock ones are compared to the Thunderbolts.

Tune may still be a possibility if I can be assured I'll get some worthwhile improvements :thumbsup: