THIS FITS ALL 2002, 2003, 2004, and 2005 altima v6's
IT IS NOT RECOMMENDED FOR YOU 2.5L 4 CYLINDER GUYS BECAUSE 3" IS TOO BIG FOR YOUR ENGINE SIZE (UNLESS YOU HAVE A TURBO)
Hey guys i'm sure some of you know about my setup, but for those of you that don't this cat-back was designed purely for the best N/A power. The nitrous was not taken into account because of its rare usage most of the year.
Now to start with i used to own a mossy catback (just like stillen but with the full cat-back) 2.25" main pipe split to dual 2.25" exhaust to dual magnaflow mufflers. Sounded decent, pretty decent power increase. Then i added headers. Took it for a test drive and the low end was GONE, midrange and upper end were aweful compared to what i expected. SOUNDED LIKE ASSS and VERY LOUD.
So i tried a few different mufflers, few different resonators, few different pipe diameters. Did A TON OF research on exhaust flow and velocity, backpressure, exhaust tuning for your desired powerband etc.
Well after LOTS of trial and error this was the final product. INCREDIBLE power increases throughout the power band, low end torque is just unbelieveable, midrange has ALOT more meat to it, and the top end......well this is this setups sweet spot, around 4500rpm it just jets off like a bat out of hell. And how does it sound? Very muscular, but importish and not a v8 wannabee sound, no tinny raspy popping or can sound. And with headers you will LOVE this exhaust because its nice an quiet. The magnaflow setup was at least 3-4 times louder. and what a nasty sound it had too!
Altimat has a very similar exhaust except he uses a louder series muffler and his gets a bit tinny in the top end unlike mine.
So anyway to start with there is a flange that will bolt up to your existing exhaust next to your cats (if you have stock y-pipe) or up to your downpipe if you use headers or a racepipe. Then pipe diamter at the flange is 2.5" and expands to 3" within about 1" of the flange. About a few inches after that there is a Straight through 3" inlet/outlet perforated core Dynomax superflow race resonator. Its about
20" long. Then shortly after that the 3" pipe shoots into a Flowmaster 50 series deltaflow muffler which is 3" inlet, and dual 2.5" outlet. The case is about another 20" long. Then the dual 2.5" run parrallel down the center of the car and then split at the back to go to both sides of the rear into the stock locations. Both pipes end at 4" double walled polished stainless steel tips.
I paid ALOT for this exhaust after all the trial and error, parts etc. I've now switched to a single 3" exhaust with a dumby dual to fill up the 2nd stock slot up on the back bumper so i no longer need this exhaust. I've kept it for a long while because i was thinking of going back to it since my new exhaust is alot louder, but i need the money now so its gotta go. The whole thing is probably been used for about 2000 miles, only seen snow once. Its my weekend car so i hardly use it.
Shouldn't cost more than $50 to have a muffler shop install it. It will come with all parts necessary to install it. I guarantee that there is not one prefab
cat-back out there that can match the peak power and low end torque this exhaust has. Not only that but the rear end looks SOOOOOOO much better with just he tips instead of bulky looking mufflers like the Magnaflows i used to have. You can see the piping under the car where it goes up diagnally and it just looks badass
Anyway I'm selling it for a dirt cheap $250 + $50 shipping. I can have it out the very next day after payment is made. I have sold quite a few things on here, and ALOT of stuff on car audio forums. I prefer paypal payment but will accept money orders if it is REALLY necessary.
You can email me at
stangme01@yahoo.com or
elementald2001@yahoo.com
Need to buy another Dynomax superflow resonator like the one on this setup i'm selling 
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