spock

iTrader: (5)

My mechanic charged me $150 to do the install. He had to cut all the fastners and replace with nuts and bolts. One hangnail though. The O2 sensor srtipped the stock y-pipe threads on the way out. The old pipe thread material was basically cold welded to half the threads on the sensor. He called me to let me know and suggested to replace it for $140 with an oem sensor. Since the part is almost ten years old, I said go for it. I also had him inspect my motor mounts and some wetting around the steering rack. I drove off for $300 and thought it a fair deal.
I will elaborate on the pipe's performance when I get a few more miles logged.

ranmas2004

iTrader: (2)

I remember when I had my 97 Maxima.....when I put the y-pipe on it was a BI difference in performance and that was the 3.0 engine. I dont know if you have 3.0 or the 3.5 but I would imagine the 3.5L gains would be even greater.

spock

iTrader: (5)

The gains are actually less on the 3.5 as both precats remain in place.

Rochester

iTrader: (3)

No gut on the pre-cats, eh? I thought maybe you would have gone for that.

All the really cool kids are doing it these days.

ranmas2004

iTrader: (2)

Gutt em!!!

Costee

Pardon me me guys, what does gutting entail, what does it mean?

Mala maña

I got a 02 with the 3.5l n I took the cat out n u wont belive the difference

4GFIRSTMAX

iTrader: (1)

Removing a section of exhaust, chipping out the catylist material and re-installing the exhaust(I'm sure there is a how to tread on this...search).

Gutting refers to the pre-cats having the internals removed.

Costee

Thanks. You mean the inside of the pre-cat will be made empty? If so, how would you pass the emission test without the cat as it were?

Rochester

iTrader: (3)

Yes, the insides of the pre-cats would be empty. You pass emmisions because of an O2 simulator wired into the secondaries, or a plug non-fouler extension on the secondaries to alter the sensor readings. This will spoof the ECU. If you're in a state that sniffs, just make sure your car is fully warmed up and your main cat will do all the heavy lifting.

This is where people start banging you on the head telling you to search.

ranmas2004

iTrader: (2)

LOL....I never seen it put like that before,....."SNIFF" In NJ they used to do that crap....put that thing in your tailpipe.

Brl24

Hey Roc, I got a question for ya... Im in a bit of a pickle, I have my new y-pipe waiting to be installed and was planning on gutting my pre's to compliment it (as I know they were recently removed and shouldn't be to bad to get off). My problem is that who ever replaced the main cat before I got the car, welded it to the stock y and the there's no way I'm cutting or welding anything to my Cattman. So I thought of getting a high flow cat and just bolt up to it.

My question is, with my pre's gutted do you think the hfc will cause me to fail an emissions? I'm in Ontario Canada and I'm sure your not educated on our emissions testing, but if you think the stock main cat would save you when you have the pre's gutted, do you think the hfc would cause a fail?

Rochester

iTrader: (3)

I really don't know. I assume the high-flow cat functions exactly to specs as the OEM cat, it only does it with more efficient exhaust flow. But I base that on nothing what-so-ever.

That and a cup of coffee...

Costee

Thanks. I guess I'm in the know now. Just curious, wondered whether I could do without the cats.
When people starting banging, I knock back telling them this a forum, by asking I'm searching. Answers from searches result from enqueries or adverts, so what's wrong adding mine to the data base?

7speed

Damn, sorry you had 02 issues. I was worried about my 02 sensor being stuck but it came out undamaged.

You will like none the less. I think it pulls harder, at all speeds. Highway, I get more pull most deff. I normally don't take off hard on the city streets but I few times I had to pull out quick and compared to before that felt faster to.

For those people that aren't trying to get to far into engine mods. I would say intake, spacer, vias delete and ypipe and be done with it. Then get your suspension upgrade which I'm trying to do. But actually should probably be the first thing you do.

Rochester

iTrader: (3)

Huh?

Wait... do you actually live in Lagos, Nigeria?

I know it's all perfectly reasonable, but can't help but feel a little amazed by that. My world is so small.

Costee

It happens.
What....you're surprised I "actually live in Lagos, Nigeria"?

Rochester

iTrader: (3)

Not a commentary on Lagos, because I know nothing about Nigeria except that it's really far away. Most Org members are in North America, so the occasional far away member is notable and kind of exotic.

Costee

Hm. Quite complimentary.
I'm afraid spock is soon going to accuse me of thread jacking; I'm taking my briefs beyond cats.lol.

TallTom

It's a wild city. If you have the skills, you should download Louis Theroux's Law and Disorder in Lagos. It's insane.

ranmas2004

iTrader: (2)

I know you asked ROC but I have experience with this...I had a 97 Maxima with a y-pipe...and on the 4th gens the y-pipe deletes the pre-cats...and I bought a high flow cat and I passed emissions test (the sniffing kind too...LOL) every 2 years no problem. But like ROC said...just make sure the car is warmed up.....you'll be fine.

Brl24

Alright sick, thanks man. That's what I wanted to here, now to find a reasonable price for a good high flow and get to it

Costee

Roch that must be for you. Since I'm a Lagosian I'm spared the ordeal of searching for the skills to download that all-important text on Lagos.

wirelessdude04

iTrader: (24)

awesomeness

Rods03Max619

iTrader: (5)

Nice to know you like the y-pipe, can't wait for my headers to arrive and get a major boost in power im sure I will be Happy right off the back...

Rochester

iTrader: (3)

Does that mean Jedi mind-tricks don't work on you?

Damn it.

Costee

"Tant pis," the French would say.

TallTom

I think Cattman's FastCat is $150-200.

TallTom

Yeah, you live it every day. It's a documentary about life on the streets there. Pretty wild stuff.

CMax03

iTrader: (3)

Cattman or Warpspeed

mrjones

I'm going to get my Y-pipe installed soon, maybe next week. I was quoted at $150. I don't feel like doing it. Cant' wait for the results.

spock

iTrader: (5)

No gut on the precats. No problems there, so I didn't mess with them.
I'm not even cool, never mind really cool.

BobPezz

iTrader: (5)

Mandrel Bending solutions has spun stainless 100cell metallic substrate high-flow racing cats and/or 300cell metallic substrate high-flow sport cats for approx $100.

100cell
http://www.mandrelbendingsolutions.c...High%2C/Detail

300cell
http://www.mandrelbendingsolutions.c...High%2C/Detail

Rods03Max619

iTrader: (5)

If I remember correct they are 225....

spock

iTrader: (5)

Can you still get a fast cat from Cattman?

And hey, what about my y-pipe? These threads do meander.

Brl24

Sorry Spock, this is your thread

Rods03Max619

iTrader: (5)

He should have a couple in stock, but not for sure....

spock

iTrader: (5)

Went for a nice drive today. Weather was great, about 60 degrees and sunny.
I must say that the y-pipe is a great companion to the spacers. With the spacers alone, I felt more pull in the lower rpm range, (such as accelerating in a higher gear without kicking down). With the addition of the pipe, not only do I feel the stronger pull, but much quicker response.
While cruising, it feels like the car just begs for a hit on the throttle. So much more responsive! Oh and it keeps on pulling when I stand on it. When driving @ higher freeway speeds, it doesn't really feel like a stronger pull, but both the tach and speedo say this thing is accelerating very well. Both rpm and speed increase more rapidly than b4.
Not much of a change sound wise, (which I like), a little more rumble @ idle & low rpm.
All in all, I'm happy with the endeavour that started out in March and just came to be. Even though I did get butt raped by UPS for brokerage fees.

Brl24

"Even though I did get butt raped by UPS for brokerage fees"

I had to pay $106 when it got dropped off, I will hopefully have it on this week.

spock

iTrader: (5)

Same extortion I paid. I keep forgetting to specify USPS when ordering parts from the US.
Are you doing it yourself?