Grow up? Yes, I drive my car on the street to the track. Sorry, I'll grow up.
I don't want an insanely loud car. Sorry, I'll grow up.

Again, you're not helping. Thanks to those who are and are not "trolling" like this gentleman.
Maybe I'll grow up on my 38th birthday? Nah.

If you're so worried about this go buy a Prius and switch forums.

Sorry for stooping to that gentlemans level.

Much of this info has been helpful so far, thank you all!

The car will trim itself while it's in closed loop. The problem is that it's not in closed loop under WOT conditions. We see the AFR plummet to 10:1 which is why we recommend a tune with the header. In addition, because it's equal length, the individual cylinder trims are zero'd out.

I think you need a Xanax.

Maybe I am naive or new to this and dont have the knowledge, but if I am getting a UEL (Revworks), does that require a tune. I dont mind getting a tune at all just wasnt sure if it was a necessity. I know you guys have mentioned it but other have said its not necessary. I dont drive the car hard and wont be going to the track just wanted the subie rumble.

you dont NEED a tune, however its best to get a tune. Just get yourself an OFT

Thanks Shady. I bought an ecutek cable and dongle, just need the license. I appreciate the fast reply. Will get it tuned after.

I believe I am the one that said to go this route.

I have the exhaust same exhaust setup you have, except add in a motiv over-pipe. Header and over-pipe were ceramic coated.

I put 2k miles on the car WITHOUT a tune. Also had 1 HPDE track day event.

NEVER have I see a CEL with these headers. Ptuning designed them not to throw a code, and they don't. End of story.

I would get a tune ASAP though...you'd be amazed on how the car feels afterwords.

And no cat is fine for a street car. Sorry it busts some tree-huggers nuts. I have 0 (ZERO) problems running catless with the setup you purchased. It sounds fantastic. As long as your state doesn't do sniffer tests you are fine. GA requires a "visual" inspection but I'd love to see a tech try and see under this car with all the trays

Sounds like Wayno needs to go live in commie-fornia with all the other environmentalists


cough up the $$$ and get a real tuning solution...ectutek is the only way to go

I have 0 cats

I also run e85

I'm all eco friendly and shit.


Plus, if you think Catalytic converters on cars are going to be what saves the planet, its a small dent in a bigger problem with deforestation and plants around the world without the same pollution constraints as here in america.

While I don't agree with his approach, I do agree with his sentiment. CO and NOx are very bad for LOCAL health. This isn't tree hugger "save the planet" crap, this is local.


Not that anyone cares, but remaining willfully ignorant of what you're doing is far worse, so give these a read:


https://en.wikipedia.org/wiki/Carbon_monoxide#Toxicity


https://en.wikipedia.org/wiki/NOx#Environmental_effects

Thank you, best forum post ever.
Running catless, you'll kill people, not the planet. Especially the guy behind you on track.
The worst part of emission are HC. The one you smell, the one that give cancer. It's very effective at giving cancer BTW.

CO are no problem as long as you stay under the limit (you'll die right away over the limit). But they're no chance to kill someone as you're the only catless car around.

You'll make mostly zero NOx without cats on a gasoline engine because AFR is neutral or rich (to make work the cat you just deleted)

Yeah....look at all the professional race car drivers that are droping dead due to driving behind all the cars that don't have cats...

CONSPIRACY! THAT'S HOW DALE EARNHARDT REALLY DIED!


yawn. go hug a tree

Your other car must be a Prius...

hahaha at this guy :laughabove::lol: