Long story short:

1. Bought a take-off OEM 997TT exhaust for about $200.
2. Got a specialty shop to "elmininate" the factory 600 cell cats ($500)
3. Incorporated O2 simulators to "trick" the ECU ($150)

Results:

Pros:

-Louder (20%) and deeper exhaust note.
-Absolutely NO droning (100% stock exhaust sans cats)
-Much better flow (no cats of course)
-Less lag, and you can feel that the turbos spool quicker
-Slight turbo "psssh" sound
-NO Check Engine Lights (AWESOME!!)

Cons:

-Bad for the environment some would say (My other car is a fuel ineffecient 6.2 V8)
-You do smell a tiny bit more exhaust after you shut it off in the garage, but it dissipates shortly ( I just hold my breath)

Overall, the mod cost a bit more than $1,000 installed ( I am a cheap ***)

I did this mod because I wanted NO drone and just a bit louder exhaust with much better flow (I hate droning cus I am old and it causes me headaches literally)

The mods I have done are IPD plenum, BMC filter, Agency Power DVs, FVD stage 1 software, and this modded OEM exhaust. I also have lightweight 19" wheels (19lbs F, 23lb R).

The car is as quick, if not quicker than my previous stock 2009 GT-R, from 0-60, and definitely faster midrange and top-end.

Now, I no longer fear the stock GT-Rs when I am driving lol. ( I do miss the GT-Rs performance out of the box)

I am a happy camper!!

 

No drone is priceless! Any video clips?

 

Will try to post video clips later.

 

Incorporated O2 simulators to "trick" the ECU ($150)
Can you PM me the info on where to get these? I want to trick mine as well.

 

What's an O2 simulator?

 

nice

 

Need to check it out in person, lets have lunch sometime next week!

 

I wonder what 100 cell cats would do for the car? I wonder if it would give the nice sound, still do their catalyzing so we don’t all die, and keep that stinky exhaust smell out of my cab?

 

The specialist shop provided them to me. I am not sure where to order them but a quick google search shows quite a few sellers.

But, I think they are from: o2sensorsimulator.com

Basically, they send a current to the ECU telling it that the cats are working fine...therefore, no CEL.

 

Give you a call next week.

 

The tubi street would be the perfect no drone exhaust for you, cats and all. There are several in the fs section, plus your car will be street legal again. In NYS, and other states, you would never pass a sniff test I'm afraid. 'A' for effort, 'A+' to incorporate a 200 cell cat like Ruf does, but that's pricey.
c

 

Yeah...that's the only thing that bothers me...totally illegal mod.

Tubi Street? Cats...and no drone..will check it out.

Thanks.

 

I had installed a protomotive turbo kit on an 84 Carrera, and that car was so far away from emissions passable it wasn't funny. The entire turbo system had to come off, oil lines plugged, old chip installed, etc. to pass annual emissions. When they say "may be used for off-road vehicles and never on public roads" they mean it. I will never do another mod to a car that requires a few days of wrenching just to get emissions inspected.

So, I did it again with my Lotus and a supercharger But I really WON'T do it again with this car.

 

You guys have so many laws to deal with, how do you guys tolerate it? I thought the US was the Land of the free.

Sounds like a cheap way to get a better sound and a bit of performance.

 

I have run O2 sims on a few cars. Very effective. Can you look up which part # your guys ordered?