Y-pipe install

[jstack2]

I know you probably lost some bottom end torque on this, but curious on how you feel the power band changed. Also fuel economy, I know these are iron pigs but be nice to get back even 10ish%:hungry:

I installed the URD Y-Pipe this weekend. Here are some pics and few notes:

Use Areokroil on everything
Remove the O2 sensors first, use the correct tool
Remove the silver hoop
Hold up the muffler with a stand
Loosely conect the front two flanges, loosely!
Use a couple wooden dowls to align the rear/muffler flange
Test fit the muffler flange with out the springs
Push up and down hard to get URD flange and Muffler flange to align
The gaskets are soft
Put front gaskets in late or they will get damaged. There is room to slide them in and get the correctly seated and the end of the job
Last step is reinstall O2 sensors

I have the stock muffler. I noticed no change in sound and a noticeable performance increase.

 

[Stembot]

I installed the URD Y-Pipe this weekend. Here are some pics and few notes:



Use Areokroil on everything

Remove the O2 sensors first, use the correct tool

Remove the silver hoop

Hold up the muffler with a stand

Loosely conect the front two flanges, loosely!

Use a couple wooden dowls to align the rear/muffler flange

Test fit the muffler flange with out the springs

Push up and down hard to get URD flange and Muffler flange to align

The gaskets are soft

Put front gaskets in late or they will get damaged. There is room to slide them in and get the correctly seated and the end of the job

Last step is reinstall O2 sensors



I have the stock muffler. I noticed no change in sound and a noticeable performance increase.

Thank you for the notes. I'm going to be doing this install in a few weekends and it will be very useful. I am adding the URD catback as well, though.

Sent from my Pixel 2 using Tapatalk

 

[badattitude]

I understand your rationale. However, it feels like I have petal commander. All the hesitation and effort to get going from a stop is gone. In my opinion, I lost low end performance with CAIs in the past on 4th and 3rd gens. This is an even power improvement throughout the RPM range. I notice it most at low RPMs actually. I love leaving stop signs now.

Still waiting for the MPG gains....

 

[jstack2]

Thanks for the reply sir!

Keep me posted on it after a few tanks, this would be a deciding factor for me since I have already invested in other "fun" things on my rig...

I understand your rationale. However, it feels like I have petal commander. All the hesitation and effort to get going from a stop is gone. In my opinion, I lost low end performance with CAIs in the past on 4th and 3rd gens. This is an even power improvement throughout the RPM range. I notice it most at low RPMs actually. I love leaving stop signs now.

Still waiting for the MPG gains....

 

[Charles Bronson]

I wish I could have convinced my wife to do the Y-pipe rather than the TRD exhaust. The Y-pipe alone would add a little more growl and I'm certain it adds more HP and TQ across the whole rev range.

A long long time ago, I had a 1996 Maxima that I modified fairly extensively. It was a bit of a sleeper sedan. The y-pipe was one of the first power mods we did. Like the 4runner, the Maxima Y-pipe removed two precats. On the Maxima's 3.0 V6, the y-pipe was good for around 15 HP and TQ to the wheels or about 20hp/tq to the flywheel with power gains across the entire rev range. I would think the 4.0 V6 in the 4runner would see at least this much power gained, possibly a little more assuming the ECU is happy with the data its seeing.

 

[1jzgte]

so oem sound is a plus.. since a couple of cats are removed, is there more or less stinkiness involved?

AFE has a y pipe that eliminates both cats as well right?

 

[raab02]

Also very curious about mileage improvements here.


I'm looking at this to be one of a few things that could have no noise increase, but does help with mileage and pep.

Ideally the right intake, plus this Y-pipe, while leaving the stock catback would preserve quiet cruising, but open up a few ponies and MPGs.

 

[badattitude]

Yes, more stink. The exhaust smell was always there but it is more noticeable. About 15% more stink. I'll reset the mileage and report back. Ive been at 17.0 all winter. I'll provide an update if I see improvement. It has been reported that MPGs should improve.

Ive seen the AFE Y pipe too. I think it was two pieces like the OEM pipe.

 

[oljedi11950]

Yes, more stink. The exhaust smell was always there but it is more noticeable. About 15% more stink. I'll reset the mileage and report back. Ive been at 17.0 all winter. I'll provide an update if I see improvement. It has been reported that MPGs should improve.

Ive seen the AFE Y pipe too. I think it was two pieces like the OEM pipe.

Must be cause I'm in desert but no smell with mine !

 

[Akkording]

nothing wrong with a little extra sulfur

 

[1jzgte]

dang it.. cant do it.. i like to drive w/ my rear window down

 

[badattitude]

dang it.. cant do it.. i like to drive w/ my rear window down

Me too, smell really is not bad. I don't want to make it sound stinky. Its fine. In all honesty I probably noticed more smell because I was hard on the gas after install. I also had the rear window down. Don't be afraid of the smell. Performance gain is no joke. Truck wants to go. I'll revise and say only 5% more stink with y pipe.

 

[91foxbody]

Me too, smell really is not bad. I don't want to make it sound stinky. Its fine. In all honesty I probably noticed more smell because I was hard on the gas after install. I also had the rear window down. Don't be afraid of the smell. Performance gain is no joke. Truck wants to go. I'll revise and say only 5% more stink with y pipe.

I think people also need to frame this conversation around their sensitivity to exhaust gases. I grew up driving modified domestic V8's that never had cats.....like, ever. The smell doesn't bother me at all, so I'd tend to say that the additional smell is "minimal." Those that grew up around vehicles with little-to-no exhaust smell would probably argue the opposite, so it's just something to keep in mind.

 

[1jzgte]

Me too, smell really is not bad. I don't want to make it sound stinky. Its fine. In all honesty I probably noticed more smell because I was hard on the gas after install. I also had the rear window down. Don't be afraid of the smell. Performance gain is no joke. Truck wants to go. I'll revise and say only 5% more stink with y pipe.

ok im gonna bug u in a year to see how u feel about the smell. This is the only mod i really want to do because i know the gains are real.

 

[raab02]

Nagging about MPGs...

Nudging this thread to see if anyone has any mileage data to report. Seems crazy that I'm chasing MPGs in a 4500lb brick, but every little bit helps!

Second, any thoughts on the ideal intake to pair with this? URD shows two AFE options, Momentum and ... regular? I had a Momentum on this truck before and it was OK.

 

[Charlievee]

I think people also need to frame this conversation around their sensitivity to exhaust gases. I grew up driving modified domestic V8's that never had cats.....like, ever. The smell doesn't bother me at all, so I'd tend to say that the additional smell is "minimal." Those that grew up around vehicles with little-to-no exhaust smell would probably argue the opposite, so it's just something to keep in mind.

The good old days, only worried about it if you started getting sleepy. Lol. I'm with you. Heat up the cats enough amd the smell dies down. Even better, run a 103 octane fuel for better air freshening.

 

[oljedi11950]

Someone tell me about rear window being down ? I've never liked that , more noise than I care for ! Just roll my side ones down ,sorry I don't get it seems like more stuff gets pulled in than just exhaust ?

 

[npottala]

I see basically no mileage difference with my y-pipe vs. stock. I was royally frustrated last week driving 750 miles from Oklahoma to Colorado and got 13.6 MPG going west in I-40. Sucks. I had the normal headwinds for this area. I made the same trip in January pulling a 14-foot empty car hauler and had roughly same mileage.

Nudging this thread to see if anyone has any mileage data to report. Seems crazy that I'm chasing MPGs in a 4500lb brick, but every little bit helps!

Second, any thoughts on the ideal intake to pair with this? URD shows two AFE options, Momentum and ... regular? I had a Momentum on this truck before and it was OK.

 

[badattitude]

im still waiting for MPG gains. I went from 17.0mpg to 17.4. Its all been in-town driving and some idling in the garage and at drive thrus and perhaps more petal than usual. Hoping a highway drive will be better..

The best CAI is the one already on the 4runner. IMHO. Maybe look for a resonator delete kit, if one exists. K&N make a nice intake tube for the 5th gen. I like the intake tube but just cant put any K&N products on my 4runner.

 

[raab02]

im still waiting for MPG gains. I went from 17.0mpg to 17.4. Its all been in-town driving and some idling in the garage and at drive thrus and perhaps more petal than usual. Hoping a highway drive will be better..

The best CAI is the one already on the 4runner. IMHO. Maybe look for a resonator delete kit, if one exists. K&N make a nice intake tube for the 5th gen. I like the intake tube but just cant put any K&N products on my 4runner.

Thanks for keeping me updated!