I like this guy. He seems like a simple man

it was nice seeing a video of yours blow up a few weeks back, maybe now you can afford to buy a windows key

the vegas pro dyno never lies

We old school motorcyclists went through this starting over 50 years ago. We learned that a 4 into 1 beat 4 individual pipes. And that a 4 into 2 into 1 (a Tri-Y in car speak) beat everything. Liked the vid!

For a h pipe or x pipe to offer better performance they need to be placed in exactly the correct spot. The old boys found the right spot by putting some non high temp paint along the front part of the exhaust and going for a good run, the middle of where the paint burns off first is the exact place to get the best performance. I doubt you want to keep doing this but it's food for thought! ... also do a dyno run because realistically except for the obvious clear winner of stock setup the others are way too close to be accurate by looking over footage. That being said I'm loving your videos so keep them coming 😉

Congrats on getting picked up by the algorithm, man. You deserved it!

Literally one of the funniest and most entertaining and straight to the point automotive channels right now with Toms Refurb, I hope you see great success, keep up the good work 👍

this channel is the automotive content I've craved for a long time

nissan sentra goated

I'd dog you for that Flowmaster because it's definitely making it sound worse, but "It's what I had" is an extremely valid response. Also, IDK if I mentioned it in the last vid, but KJK (the other guy who tried 1-4, 2-3) reported an increase in torque and mid-range with the even-fire UEL design at his 3x length ratio. Haven't gotten another update from him since, so there's only the build+startup+static mild rev. Really wanna hear that car under load to see if it improves, but anyway. Also, if you had a 1-4, 2-3 equal length, more commonly known as a 4-2-1 or tri-y, that was properly made, those see benefits across the board under 8000rpm. David Vizard and other builders of his caliber strongly recommend a 4-2-1 (1-4, 2-3 paired) equal-length header on any 4-cylinder that doesn't spin past 8k. Though it does involve a bit of math to tune the primary and secondary lengths and diameters.

glad i stunbled onto your channel you're very entertaining! love the content! its the true dual exhaust vid that i found you through!

Love the editing, style, pace, overall delivery. Don't change a thing!

This is great content, fast cuts, no bs and humor. I wasnt going to watch anything from anyone today, but curiosity of true-4 sound turned out to be 4 videos in a row. Noice!

I like the content man made me subscribe after seeing a few of your videos keep it up

Just came across your channel and realized I live right down the road from you. Love the videos

I already got some 4-2-1 headers and I’ve been debating chopping them up into true duals for a long time. Glad I found your channel. Looks like you’ve been having a lot of the same crazy ideas as myself 😂

I'm just impressed you drew all that in paint instead of using notepad, or even the text tool in paint. Subscribed.

Another good one, informative and entertaining 👍

I like the simplicity of ur vid. We found a good one, boys 🙏

This shtuff is great. Keep doing it

Glad this channel is getting attention now. I can’t believe you bought new parts, are you feeling ok that’s out of character? Thanks for the quality garbage content.

Was dubious of the channel name... but am well and truly glad I clicked on whatever random video that ultimately led me here. You take XYZ idea, you run with it, show the results, maybe BS for quite literally a few seconds and then out. No drama, no padding, no BS. You, sir, are to be applauded; bravo!

Subscribing! I just love the vibe of the vids man!

Science! I like that :) I would say that for power the best option would be equal lenght - 4-1 with long primaries or sequentially paired (1-3 2-4) 4-2-1. Of course with all the tricks like stepped piping, short colector. Perhaps maybe even venturi effect could help too (?).

Good work. I think the new one sounds pretty good.

The full exhaust brought back all the torque I'm sure 😂

Haven't watched the video- but whatever loss is associated with the H pipe setup is worth it to my ears.

In my experience building motorcycles, having some back pressure in the exhaust system over straight pipes helps performance. I have no idea why that is in all honesty, but my bike ran way better with some back pressure. In this case the “stock” setup with a muffler gives you some back pressure and likewise the 4 into 4 zoomies have virtually none, so I figured they would perform the worst. Thanks for the entertaining vids!

Love the content

Been waiting for this for a while. I own a spec v and was curious

True Dual 4 Cylinder Exhaust is my biggest inspiration this year

I choose a 4x2 to my car even knowing thats not gonna make it faster because i heard it once when i was a child in the same model. I just wish it doesnt make it slower 😅 (already have the exhaust but engine is not ready to run yet). Thanks for the vids, i was looking for this at a long time. Whatching u from Brazil 🔥

Why does this man only has 31k subs? he deserves so much more! Funny and entertaining😂

Editing goes hard

Damn great videos man, I never realized how different a 4cyl can sound! Can you make me headers for a 2.8 mpfi?🥴

I sure am exhaust-ed after seeing such a great video

i just had this done to my 03 SVT focus, coming out of the front bumper on both sides, very unique, lots of eyes lol

Interesting results on the exhaust setups , surprised stock won.

You should try adding a second looping pipe that is twice as long as the other pipe to try and mimic a V8 sound

please make more videos with tuning and experiments!

sounds really good tbh

This man is FranzJ of car content

Love your videos. Looking at your results, the delta between normal and all the others seems suspect. Same stretch of road? Colder temps on that day?

Awesome work and experimentation😮 Just did some research on a jet engine exhaust system that did some crazy stuff. 🤔 What about an overlap of both your ingenuity and that- all with just some of the things on hand? Like a exhaust turbine of sorts?

Control Exhaust = Angry Bees

I loved the part when you cooked the heat wrap lol

yeah, but the true quad still sounds the coolest. I wonder if crossovers at where the collector would be would help with scavenging.

Microsoft Paint - A hawlmark of any kwality production!!! BTW LOVED IT!!!!!

this guys great

Equal length headers with an h pipe and an h pipe with resonators would probably sound wild!

The one thing you never took into consideration is the distance between exit location of the pipes. Having the pipes further apart actually INCREASES the rumble sound. And closer together has a similar effect to a crossover. Listen to a corvette with a quad exit in the center. Ive even seen one with true duals (no crossover) and it sounded like it still had a crossover due to the exit locations. I actually built a true dual exhaust on my honda accord 2.3 about a year ago. My pipes exit on each side of the rear bumper kinda like an old muscle car. It has more of that aggressive rumble sound than even your true dual. Also, theres other factors that can have an affect, such as runner lengths, and overall pipe length on each side. An exhaust with a crossover or y-pipe with equal lengths from header to crossover will have a smoother sound than one with uneven lengths before the crossover, such as on a truck, where the exhaust will usually run down the passenger side. Muffler placement also has an affect.

Now that's the gearhead content i want to see, yay ! I want to know and hear about annoying stuff like the flex joint IF stuff happens and is annoying ^-^,

Another banger video from haters garage

NICE.

Should do a true triple exhaust

dammm it goes wild

True Quad is the best... You just need more power to make it see its true potential :D HAHAHA I love it man, keep up the good work

Your ecu is tuned for the normal exhaust so no surprises it worked best.

The true duals must lose too much mid range torque. One of them might make more power than stock but at redline, and that’s not real world driving. Only on the race track do you always use the upper range of the revs. It was interesting to hear the different pipes. Excellent work man!

Always hated how inline fours sounded, but is there any chance I could convince you into making a vid of a mustang style header where they made a flat plane kinda sound like a cross, well that and a different firing order

Haha jokes on the exhaust shop guy, im after a specific brand of niche, anyways you should do a crossplane conversation 😅

Pretty sure you have to either tune to have proper fueling or add intake volume to benefit from the exhaust systems extra flow and add more fuel. Pretty sure stock maps cant adjust properly for the modifications so a tune is necessary.

neat!

Never owned a sentra, always liked them though. Solid car

2 things that I can think off. The weight of the pipes and the backflow. Typically you want to have some backflow to the engine so it doesn't make vacuum pockets which steal potential power right out of the cylinder

2 factors on why the quads were slower. Since you have more pipe, there was more weight added. Having only 1 pipe will cause a higher exhaust pressure velocity coming out so it will flow better than having 4 with less exhaust pressure velocity.

Can you please re-do the 1-2 & 3-4 pairing but have one side’s exhaust pipe be much longer than the other, and the two exhaust pipes being further apart? Like side pipes for example? That would give you a true 45 degree v-twin kinda sound imo.

This one is good

maybe its because the 4 banger its even fire, when v8 pick up power with the x or h pipe its because of the oddfiring and equalizing effect of the flows in the exhaust, this 4 pulses go just one behind another.

I have two Flowmaster fxs on my Nissan Altima 2.5 and they sound great. Bottom line is the dual exhaust versions just flowed too much. I'm guessing if you would have used a smaller diameter pipe in your true dual setups it would have worked well.

I still prefer the sound of the true duals w/wo the h-pipe . I would make up the difference in efficiency by going to a host engine with forged internals ( ecotec 2. O , srt4 2.4 ) and add compound boost . Example ; supercahrged ecotec 2.0. Add true duals with a tiny turbo at the end of each exhaust. Reduce the boost on the factory m62 supercharger and factor in the compound boost of the two tiny turbos .

Nothing Will Beat The True Quad. Screw The Performance That Sounded Fucking Awesome

Is it possible that the increased times are a result of an altered/ less effective exhaust scavenging pattern? And what about cylinder pairing per pipe? (ie 1&2, 3&4; 1&3, 2&4; 1&4, 2&3.)

Are you still wiling to experiment with exhaust sound? I have one suggestion. Split the exhaust in two ant he end, route one pipe back to front and reintroduce that back to the system. That should really mess the pulses up. At some rpm might even sound like double the cylinders.

The single exhaust performs better because of the venturi effect. One exhaust pulse pulls in the intake charge resulting in more power.

Hell Yeah

Bro need more likes an subs i want to see MORRRE

Hi. From what I saw in previous videos with true dual exhaust you connected cylinders 1-2 and 3-4. I wonder what the difference would be if it was 1-4 and 2-3?

quad exhaust will always sound better imo, has the sound of a subaru without uel headers.

what about a all in one collector. (those weird cone shaped ones)

To only lose a second isn't bad to be fair, also, fucking performance when it sounds SO DAMN GOOOOOOOOOOOOOOD!

honestly planning on getting a true dual on my miata.. imma get some measurements

i enjoy your videe good fideo

saw the title, watched the video, 3 minutes later I got exactly what I wanted

Im not professional but people says you need tune for exhaust to work. Maybe your cars original tune is good for normal exhaust. +you gave special attention to normal exhaust too 😂

What would a 4 cylinder engine sound if you make 2 headers? One that collects 3 cylinders and the last one goes separate and then combined at the end by a x or h pipe?

Go for a true equal length header setup.

Now for a true qaud exhaust with duel x pipes

Lovely welds.

Good ol' Chinesium fumes LOL

What does painting the header do? Does that help keep the heat wrap on? I have no clue please enlighten me.

now do two exhaust pipes per cylinder

I'm curious if its possible to make 4-2 manifold for r4 single turbo or do I have to replace it with two smaller turbos?

sacrifice to the algorythm gods

you should test back pressure, go smaller and smaller to see what happens and how much is too much, lol

I'm curious if it's possible for a r4 single turbo or do I have to replace it with two smaller turbos?

you should get a three cylinder geo metro and do a true triple exhaust

Sounds nice! I also did enjoy the quad but if it lost performance, well, you know what to do. :)

Idk what size you’re using but if it’s dual 2.5 that’s like the pipes on my 5.0.I would try a smaller pipe.

What about true dual with stock diameter pipes? I thinking with larger pipes you might have gained more air flow but lost the scavenging effect.