test pipe is cheaper then hiflow cat. 100 sell .

i would go fore catback and testpipe = most gain

 

How are you guys liking the Mil.Spec 100-cell? How about the available 200-cell units? My OEM main is holding me back quite a bit, but I do not want to make the car any louder if I can avoid it. I passed state emissions flawlessly this month, so that is not a problem. TIA!

//edit// Ideally, I would like to free up some flow without compromising my car's ability to pass the sniffer. The two or three hundred cell looks more appealing, but I particularly like the fact that Mil.Spec's product has metal innards and is made in the U.S.A. I would probably add a shell/shield on one for visual purposes though.

 

So even with a HFC you need a tune with that too? I was thinking only if it was a testpipe.

 

Some times the HFC throws codes even with the o2 spacer and a tune will turn off the CEL.

 

I see. That sucks. Does it still drive normally fine?

 

If the CEL is triggered due to a false positive, then yes.

 

Listen,
I have a 11 GSR with: Ets intake, upper and lower ic pipes, Cobb down pipe, Cobb high flow cat, stock exhaust, Cobb ap & Ivey tune on top of that and the car is stupid fast. I know I'm listing more then your asking, but just so you know for the future.
Reason I don't have cat back exhaust is cause I can't stand it being loud I'm 38 and drive it to work everyday and of course my wife can't stand the car as is forget about having it louder lol.
And ? Hopefully next spring I will like to get a second tune saved on the AP to be used with race fuel only and no cat and no exhaust, open pipe with a custom straight pipe. So when ever I go to the track I just switch to race gas, switch tune and the most pain in the *** part to swap exhaust out, but then the car will be even stupid faster. I don't mind going thru the trouble of swapping out the exhaust for track days cause my friend owns a shop and it's not like I go to the track every week, more like 3 times a year if so. Good luck

 

It drives fine and gives it that cool "spit fire" sound when down shifting. But the problem is when you have the light on you'll never know if you have another problem with your car. So it's best if you get a tune done as soon as you have money for it.

 

Yea thanks for the info man. Ill just look for a catback for now

 

Anything that alows the turbo to spool faster is worth it. Myself, I would just save for a reflash since that's good for way more power alone.

 

[QUOTE=S2K2EVO;9903974] so you were planning to remove the Hi-flow cat as well when taking it in? Don't think the dealer will honor a warranty if you replaced the Cat, so why not get the Ap much less of a headach to reset

 

I was running a Perrin how flow cat downpipe for a good while and I was running a accessport tune car my car rode amazing. I think Perrin puts a 200 cell in they're down pipes. Im selling my old one if your interested.

https://www.evolutionm.net/forums/sa...me-offers.html

 

I don't mean to go off topic here but do you have any sound clip of your setup? I'm in the same boat as you but you got me beat by a few years. I turn 6 next mouth...

 

Hey buddy, no sorry no sound clip but it sounds stock only the intake sounds loud though, again when you get on it.

 

Ok, thanks!