Nismo cat back exhaust low end loss

[Leadsled124]

Originally Posted by Tmoses

that is disgraceful! and disgusting!
i wish they made a better y!

Yea they almost got it right, used the right size pipe but cheaped out. Maby they made the y pipes on friday and left work early lol. As for the comment above saying nismo is best, it really is not meant for a stock titan if you add up the cfm's that can be pulled into the motor and pushed out. After cams yes. I woulda loved to at least tried it but the nismo stuff is so expensive! Thats why i did Stillen headers. BTW imo the best headers for this truck are yet to be made. Use stillens primary pipe size and make them equal length like the nismos , but thats another topic for another day

[Tmoses]

i agree.. with the headers situation. stillen headers are very nice but like you said they dont have equal lengths like the dragsters pushing 1100 hp do

[Sftail1990]

Originally Posted by Leadsled124

Yea they almost got it right, used the right size pipe but cheaped out. Maby they made the y pipes on friday and left work early lol. As for the comment above saying nismo is best, it really is not meant for a stock titan if you add up the cfm's that can be pulled into the motor and pushed out. After cams yes. I woulda loved to at least tried it but the nismo stuff is so expensive! Thats why i did Stillen headers. BTW imo the best headers for this truck are yet to be made. Use stillens primary pipe size and make them equal length like the nismos , but thats another topic for another day

I agree with your header deduction, that only make sense, Nismo has come down some in price, Stillen is not a price clearing house either for that matter, but just from the pics of the Nismo exhaust, true 3 bolt flanges instead of slip fits is the ticket for a good quality exhaust however, plus if I intended later to increase that breathing a bit more, maybe with cams, I don't want to buy another exhaust to get there. I want to buy it once and be done with it.

[roy365]

Originally Posted by Leadsled124

If you buy JBA USE the y pipe!! The stock y pipe is garbage. After trying 4 different exhaust setups JBA won hands down with most TQ. Any exhaust with a 3" y pipe will kill tq, just use that as a rule of thumb. The Nismo is a duel and is more for topend, or a heavily modded truck like papa D's, but he even modified the nismo. The stock y pipe is junk and ill show you why...... Its not properly cut and welded its pinched and welded. Heres a pic of the inside cut open to see the 2 pipes merging into one........

Does the NISMO come with a y-pipe as well, or only the JBA?

Since my truck is "heavily modded" which one will give most gains for me?

[Papa_D]

Originally Posted by roy365

Does the NISMO come with a y-pipe as well, or only the JBA?

Since my truck is "heavily modded" which one will give most gains for me?

The Nismo is a "True Dual" meaning you have a separate pipe for each side of the engine and it remains separate all the way through the exhaust and out the back. Most of the systems merge at some point, either via a Y pipe or via a crossover in the muffler or simply dumping into a large chambered muffler.

Here is my take on exhaust in regards to power and how it's delivered on the exhausts I know a fair bit about. It is broken down in the order of the most to least low end torque and it's not rocket science to figure out.

More low end comes from smaller pipes and more top end comes from more flow velocity through larger pipes to a point. It's that point of no return that you have to be careful of, too large a pipe equals loss of velocity and poor power while too small a pipe equals great low end power but poor performance on the top end.

You also have to realize that with different headers and Bpipes as well as cats, the choices become complicated and more confusing because if you ask around you will find that there are different Bpipe sizes being run, mine happen to be 2.25" and I may make a summer set of 2" but that's another story.

When it comes down to it there are so many ways to tune the exhaust, if you are not educated enough to know what to change yourself, copy somebody else's and call it a day.

Changing the exhaust can be an expensive mistake if you are just throwing pipe at the truck and you may be disappointed in the power delivery like I was If you are trying to launch on street tires.

Decide what it is you want to do and then choose an exhaust that does that. I run the exhaust I do because it suits my purpose which is to be the quickest full street trim Titan on snow tires with a stomp the pedal consistent launch.

1. Monster low end IMHO goes to Zoomers with the 2" Ypipe but I couldn't launch it on street tires at the track due to all the low end. I think this exhaust rocks for a mildly modded Titan but gets very tough to launch consistently once you add more ponies. I won the OT NA dyno award with it, it's expensive but has superior build quality.

2. Very good low end and top end performance goes to JBA, a good balanced system and if you run drag radials, it will perform great with solid track launches but still has too much torque for a slam the pedal launch like I want on street tires at the track. Inexpensive with average build quality.

3. Zoomers with a 2.5" Dr Gas Ypipe has good balance, leaning toward the upper end of the power band and is great if you want a flat footed, slam the pedal to the floor, consistent launch on street tires at the strip. I also won the next OT NA dyno award with this modified system.

4. Nismo is a little bit better performer than the Zoomers with the 2.25" Dr Gas Ypipe, great loud sound, the best in my opinion, with the best build quality I have seen yet. It is Pricey but may well be worth it to you depending on what you want and I got the same flat footed launch out of this system as with the Zoomers w 2.5" pipe and ran the 13.851 full street trim on snow tires record run with this system.

5. Nismo with Dr Gas Xpipe is a good performer but how good remains to be seen because I have to add some Wurth exhaust paste to the joints and let the tune come in a bit. I flow more GPS with it vs the others according to Cypher and time will tell performance wise. The Xpipe makes the Nismo exhaust a different animal and it is pricey as well.

There is no one size fits all exhaust and there are plenty of ways to make it through the quarter in under 14 seconds, I only wrote about the exhausts that I was the most familiar with, there are other very good exhaust systems out there capable of running a sub 14 second quarter but you have to decide how you want to achieve it and mod accordingly.

Attached is a copy of my truck equipped with the Nismo exhaust doing a slam the pedal launch on the street. Although I still don't get a flat footed street launch without wheel spin, my track launches on street tires are very consistent and tough to beat. If you want to run 13's and don't want to spend 800.00 on drag wheels and tires and yank off weight, it's a very good solution.

Nismo Exhaust- Video

[ecrawford]

Originally Posted by Sftail1990

I would disagree with that, I think the Nismo is the better exhaust out there right now. Not sure if they have the 2.25 inch pipes or not but I know the Nismo's do. I know of one guy that has them and he loves them, Papa_D to be more exact. Try and do a search for him on here and other sites, he has done quite a bit with it here lately and is doing a Dr. Gas X-pipe to the Nismo as well I think. The sound of the NIsmo is great from what I hear. Do a little more research before you jump off and get JBA, not that they aren't good, they are, but I think the NIsmo's are the ticket right now. I would have a set except that I want dual out both sides behind each tire, old fashioned I guess, and Stillen is the only one I know of that makes that with the 2.25 pipes up front too. Take a bit more time and do some more research yet, as I said do a search for Papa_D and you should see some reviews from him as well as an install writeup on the NIsmo.

Just trying to say that the JBA wins out for the type of performance that I'm looking to get out of the truck with my other planned mods and cost. I would agreen that the Nismo exhaust seems to be very good but it looks like unless you plan on doing some heavy modding down stream that you will not be able to take full advantage of the system.

[Tmoses]

awesome write up papa as usual!
what is the benefit of slapping on the x pipe to the nismo true dual exhaust system?

[Leadsled124]

Papa D knows his stuff with exhausts thats for sure. I would really love to see you go sown the track at least one visit in a good DA with some DR's just to see how your new setup compares to the other proven setups

[Papa_D]

Originally Posted by Tmoses

awesome write up papa as usual!
what is the benefit of slapping on the x pipe to the nismo true dual exhaust system?

Thanks my friend, the Xpipe will help to scavenge the exhaust out of the cylinders to make more room for a fresh air/fuel charge which equates to more power. It also quiets down the exhaust substantially so that the local LEO's don't know what I'm up to all the time, lol.

I loved the sound of the Nismo without the Xpipe but EVERYBODY within a quarter mile knew when I punched it, lol.

[Papa_D]

Originally Posted by Leadsled124

Papa D knows his stuff with exhausts thats for sure. I would really love to see you go sown the track at least one visit in a good DA with some DR's just to see how your new setup compares to the other proven setups

I imagine it would be about the same, maybe slightly better. I don't think any body's truck is much more powerful once you get cams and similar mods, we just use the power a little differently throughout the power curve is all. If I pulled weight off and used small slicks, I might be able to eek out a 13.60 on a 55 degree day.

[Blackbeauty]

Originally Posted by roy365

Does the NISMO come with a y-pipe as well, or only the JBA?

Since my truck is "heavily modded" which one will give most gains for me?

Check my sig for the install thread. Tons of pics in there of the Nismo.

View from rear to front of Nismo:


View ahead of front hanger and bracket:


View from front B-Pipes back:


View of entire system layout:

[roy365]

Originally Posted by Blackbeauty

Check my sig for the install thread. Tons of pics in there of the Nismo.

View from rear to front of Nismo:


View ahead of front hanger and bracket:


View from front B-Pipes back:


View of entire system layout:

YAY!!!!!!! It DOES come with a y-pipe!!!!!!

[Blackbeauty]

Technically... not really. The two pipes after the cats don't converge or ever see the same space through the whole system. So, no "y" collection pipe into the muffler. But they DO have piping from the cats to the muffler included if that's what you're calling a "y" pipe.... True duals, separate right and left exhaust banks, from engine to exit. The Nismo just sends both out the same side rather than split them into redneck rear bumper territory..

[roy365]

Originally Posted by Blackbeauty

Technically... not really. The two pipes after the cats don't converge or ever see the same space through the whole system. So, no "y" collection pipe into the muffler. But they DO have piping from the cats to the muffler included if that's what you're calling a "y" pipe.... True duals, separate right and left exhaust banks, from engine to exit. The Nismo just sends both out the same side rather than split them into redneck rear bumper territory..

Dang you are like an uncivil engineer.

psst......I'm at work.....i cant type as much, but you answered my "question". I just needed to know what and if there was anything to replace my existing y-pipe.

[ecrawford]

Just installed my JBA today and it was a bit more quiet than I expected. Not sure that I would want it much louder and the exhaust note is really deep and nice. Didn't seem to loose any bottom end and overall the truck seems to have a bit more pep. So far, its been a good decision. Just wanted to give an update.