NEW! (2016+) Toyota Tacoma Exhaust System

So I read in here a few people think they got a decrease in power after changing to other aftermarket exhaust and I think I am seeing the same effect with my mbrp setup.I installed a intake system and felt like it may have improved my response since and possibly even mpg.A week later I put the exhaust on and boom I feel like I can't even climb a hill in this thing, I absolutely love the sound of it but I think I may switch back and test my theory to see if it gets better with the factory setup.

 

That sucks spending money on a system that you end up losing power. Is it a dual or single? I know MBRP offers both I believe. I haven’t experienced that with my new system at all. Might need to crossover and try out this new system when it’s released

 

Sub'd

 

In for more awesome sounds this week

 

Me too! Haha. I pick up my truck this morning. Then I’m going to see about where I can mount one of my GoPro mounts so that I can record from outside. I want to get those sound clips done first. Then I’m going to remove the side exit and finally install the dump and record some from inside the cab again and then in the same location on the outside of the truck. Then hopefully that will give Keith some time to get caught up/finish with the Tundra Group Buy. Right around the corner I should be receiving the New Y-Pipe with the Muffler.

 

I have 3" MBRP that was previously an axle dump. For me the highway drone at "normal" speed 75-80 was very loud in the cab. I did not really feel like there was a loss in power but I noticed the shift dance and TC lock/unlock more due to the sound.

I added 2.5" over and behind axle to the stock(ish) position as I left it angled about 45* back. I also had the 62/58 TSB done. Truck seems quite responsive and shifts better but the dance is still noticeable when adding throttle. Once you land on a speed it really mellows and at the mid 50's with flat land it will fall to idle sound levels. Drone is gone, cruising from 65-76 or 77, it is still audible but not loud/annoying as it was previously.

I would suggest adding a 2.5" section post muffler to choke/slow the exhaust gasses adding a bit of back pressure. It helped my drone and my Taco seems so much more responsive than when I bought it. If you know a muffler guy it will likely no cost you much for a few inches of 2.5 welded in somewhere between the muffler and axle. Worst case you are out a few more bucks and can still switch back to stock if unhappy.

Good luck!!

 

funny some folks say exhaust loses power.

in ovtune's postings he states the factory exhaust is a real choke point that kills power on these trucks.

 

Correct, but he is running a tune that can take advantage of more flow.

 

That’s a great review. Hopefully that will help you out @Mack411. Gives you a couple things to play with at least. I’d say the current system I am running on my truck now as the prototype has similar results you are currently having with your system. Truck is very responsive and shifts better. When you step on the throttle you definitely get up and go. It kind of reminds me of having a Nitro button. I hit the Nitro button (gas pedal) and you fall back into your seat and feel the power take over. Once you land on a speed it really mellows and at 60 with flat land/slight hills it will fall to idle sound levels as you watched/listened in on of my sound clips I posted. Drone is gone. Get up to 70-80 cruising speed and the sound is definitely tolerable, not loud/annoying. The Drone is really noticeable around 2.5-3K RPMs. Above or below, it’s golden. That’s why I’m extremely excited about receiving the New Y-Pipe with the Muffler built inside of it. Should take care of everything and I truly think it will be the system that Dirty Deeds runs with for the Group Buy as one of their main options.

 

That’s exactly what Keith was saying as well when I was down in SoCal.

 

So it's a single pipe and its 3inches,make any since to you why I would lose so much bottom end power?

 

That is exactly what mine WAS. I was looking to decrease drone and the muffler guy I went to asking for 3" exit behind the tire suggested I go 2.5 to add a small amount of back pressure. This would help low end, he claimed, I was skeptical but it did. He also thought it would greatly reduce drone since it would cause back pressure, the gases would then fill the muffler more instead of passing through it unaltered.

Part of the issue is if one does not replace the block through the cats to the flange is you are at 2.25" at the flange. We have 2 sets of cats that are quite restrictive as well. so you have a 2.25 stream of air blowing through a 3" tube. The MBRP muffler has very little restriction/baffling so the gasses just pass through the middle of the straight muffler. A bigger pipe then acts much like a dump because it is larger than the exhaust stream.

Think of putting a 1/2" water pipe before a 1" the flow will seem weak. Put it the other way around and you have doubled the flow strength due to the restriction. While it seems counter intuitive it seems to work providing the low end power as well. Once we are moving it takes less additional force to increase the spin of the tires.

 

I wish Keith was on this coast rather than that one so I could allow him to play with mine. His work looks good and he seems to know what to do and how to tune the exhaust system to the vehicle and the driver's wants/needs.

It seems, some manufactures put the same muffler or resonator on a dozen different vehicles and exhaust systems and customers wind up getting 1/2 or less their desires met. Then the customer is out the cash and looking for another to fill the ticket or living with a choice they made and may not like.

Dirty Deeds, based on what you have shared, is and will be the solution many seek. I was looking to change the sound from "sedan" to "truck" and have done so. Others are looking for clearance, increased performance, ability to change for off-road vs street, or adaptation to other mods (OVT turbos etc). I think he is able to suit the varied needs of TW and it's members.

 

you're missing my point. those that are saying they are losing power are experiencing a placebo effect. even gains would be unnoticeable. you can't feel 10hp gain or loss. even a back to back dyno pull can see variances of that amount.

the only way to truly measure performance changes is on a dyno (same dyno) before and after the exhaust is installed. then compare power curves.

 

Far from true my friend,when I say I lost power I lost power. It is a very clear difference in low speed climbing power,my driveway is about a 40° grade easily and the day after install I wasnt sure it would climb it.I at times have to be almost to the floor on throttle when climbing from a stop.Im not claiming any certain hp loss specifically but the has been a change in performance that is not placebo.

 

1: unless you're driveway looks like this i call BS on the 40* driveway.



2: Then you're saying before a catback exhaust you were able to climb this effortlessly in 2H but after you had to floor it I also call BS. Catback exhausts will not under any circumstance have that kind of impact on torque on a motor.

3: Though an OEM will always try to go the most cost effective route, due to EPA requirements they will always make sure an exhaust system meets both noise and efficiency requirements. A poor or restrictive exhaust hurts mileage and power levels. Under the best circumstances, a full exhaust headers to tail pipe including hi flow converters will net you luckily ~20hp at the wheels with an NA motor. Boosted motors are a whole different game that's not applicable here.

 

Wow your funny,You sure do know where I live and what my property is built like huh, and how my vehicle runs huh. My truck lost power climbing a hill from a stop and your opinion or approval is far from needed, don't believe me then come on down here and I'll prove it to you then I'll show you what people like me do with smartass people like you. Take care and go troll someone else somewhere else please. Im here to actually spend money and learn from knowledgeable people.

 

Stock pipe diameter on all Toyota Trucks and SUV’s tend to have such odd ball sizes. Deviating from this weird sizing tends to have adverse affects on almost all Toyota’s. Go smaller than stock and you lose overall power. Go bigger and you lose low end torque with no benefit to top end. When using stock exhaust manifolds, the only restrictions tend to be only the Muffler. Replace this with a Muffler that flows properly and you gain but only low end torque but also overall horsepower.

 

You are telling me that if you have a 20-30 year career in whatever it is that requires testing to verify change, performance, etc and you develop a new system that you haven’t “Dyno” tested yet, you truly do not think they know what they are talking about and cannot tell what gain or loss they have developed, as well as, they are not able to give a rough estimate of say a “3-10hp 10-20 tq to the rear wheels“ statement? That’s BS.

A true professional that has had a successful career, should know without having to use a “Dyno” for results what they are working with. Now if you are wanting the exact numbers, I get that. Have it put on a Dyno and you can get exact results just like OVT is doing currently. Nowhere in this thread have we stated this is the exact amount of HP you will gain with this system. We HAVE stated that anytime you remove the stock muffler in favor of a flow thru design, you gain that power. Therefore, magnaflow, Gibson, borla, etc will also gain this same power.

I don’t know about you but I was a professional athlete and I could look at an athlete and give you the breakdown of them in two seconds and I would say I would be 90% accurate with my statement. I can also look at a pitcher and tell you exactly how fast he or she is throwing just by looking at it. I do not need a radar gun to tell you what they throw. I just know by the experience I have gained over the years, as well as, being called a “professional athlete”. If I couldn’t tell without a radar gun in my hand, I would seriously question a lot! Now if I want to know for sure the exact number, yeah I’ll grab a radar gun. But I sure as heck can tell without needing a gun, what I am looking at and/or feeling. For god sakes, I’m a professional. That should be the least possible thing I should be able to do.

I do not think Mat needs to “Dyno” all of his experiments with his tune to know how much HP etc he has gained or lost. He uses a Dyno to get an exact reading, but I’m sorry, the guy is a professional and knows what the heck he is talking about. He’s been doing it long enough. Dyno are used to really fine tune the final results. Just like Keith and Dirty Deeds, I’m sure at some point he will do some serious testing on his system. However, as of right now, he is getting a prototype out there and getting everything built. Then he will start to fine tune his system which is what he currently is doing. He is a professional as well.

Take your comments somewhere else please. You do not have to purchase this system. However, don’t be one of those individuals that makes comments like this now and then in a couple months when everything is going great and there is so much positive feedback and results, you’ll join in and purchase. It’s like the guys that talked shit about OVT and said that anyone trying to crack Toyota’s mapping or create a tune is nothing but a waste of time and money. What are they saying now??? Exactly!

I agree! You can definitely tell a difference. How about those guys that claim they have lost power with stock gears and need to upgrade to 4.88s or 5.29s. Did all of them get their trucks “tested” to know they lost power. How about when they test drive their trucks for the first time after the new gears are installed? Should they not be about to feel a difference between the two and make a statement as such because they haven’t “Dyno” tested their trucks before and after. Such BS

You definitely have it right! I did a ton of research on systems before reaching out to Keith. He is amazing and a true Professional! I cannot wait for others to be able to experience his customer awareness or needs/wants. He truly listens to each and everyone of his customers. If they ask for something, they will get it. He also holds true to his word. If it’s not right, he will fix it. He does not own the Tundra for no good reason. I truly believe he will soon own the Tacoma’s. Thank you so much for your comment and support!

 

Woah slow down cowboy.

Not talking about DD’s kit.

Catbacks can gain power but usually at the top end and usually only 5-10 crank HP which at the wheels is only about 75% of that.

Back to my point about butt dyno. You can’t feel 5 crank hp gain. Hence why a dyno helps prove the gain.

My complaint is folks claiming they’re losing huge power from a catback. It’s just not the case.

So cool your jets. Not talking shit on Deeds work.