so its better lower diameter on exhaust tubes for more performance?

4-1 shorty headers say otherwise, as continuously proven for years now. Long Tube Headers have always been made for low to mid-range while having some gain at the top. Short Tube headers are almost exclusively designed for top range power at the cost of low to mid-range.

@@luisgrajeda4147 Depends on where in the rpm range you want to make power.

The best thing to do for a crossplane V8 is to make an 8-into-1 that fires in a rotary/sequential pattern. Basically, pic a direction clockwise OR counter-clockwise, and then attach equal length primaries to the collector in that manner according to your firing order. The next best thing you can do is 180-degree headers while also making each 4-into-1 side have that radial firing pattern. (Also do an X-pipe or an increasing diameter Y-pipe at a roughly 4/3 size ratio if you want to further maximize scavenging while also preventing it from sounding like two 4-cylinders playing together) The next best thing you can do if you don't want to do either of those is try to make sense of the madness that is David Vizard and make a purposefully UN-equal length header for each side that would make the un-even firing of each bank even out by delaying certain cylinders' exhaust pulses from getting to the collector via making the primary tube longer. NOTHING else is the technically correct way it if you're trying to maximize scavenging for a crossplane V8. If you're not willing to put in any of the above work, you might as well buy something off the shelf and ballpark the primary and collector diameters.

@@Drunken_Hamster thank you

@@Drunken_Hamster I've read somewhere that 8 into 1 header makes less power because the resulting collector size would be too big to promote good scavenging.

Yes it's ok

Less restrictive for engine , gas running faster with faster airflow , engine could run lean mess up air fuel ratio and create more heat .Remap ecu to fix it

It’s completely fine, just get spark plug defaulters to trick the rear o2 sensors if you have them, it gets rid of the engine codes it throws

@baljeets Pp that doesn't work for ever car. Some are more sensitive

Mohammad Yousuf depends on the engine, what the goal is, how much money you want to spend There is no absolute answer

@@speedlabchannel4452 how about v8 engines ? I heard the try y headers will provide better performance due the scavenging effect at mid rpm while the 4-1 will at top rpm range

That's for turbo cars

It depends on how much PSI and CFM your engine is running at. Say a turbo 2.2L L86 Ecotec will love a 3 inch total exhaust (and each runner will be a larger size) then a 2.2 L86 will use a 2.5 inch total exhaust and smaller runners for a higher exhaust velocity and scavenging effect, that's how the common misconceptions of your car needs back pressure when in reality it needs exhaust scavenging.

@@SlowSTEN when idiot youtubers comment with something totally unrelated to the video SMH

My video never touched on v8s

I have a Doug thorley on my samurai lol

😆! Bro enjoy! I did the same thing with a 2.8 Chevy motor back in the day

We don't sell stupid shit like scav

4-2-1 long tube

Are you sure you measure the stock correctly?

@@speedlabchannel4452 yeah, the pipes go thin before the catalytic channel, 4 to1 by primary O2 sensor to 2 channels to 1 on the secondary O2 sensor before resonator and muffler... I checked the outlet size.. I took out heatshield to save weight... I put extra cooling fans on switches for parking and camping.. lol the beach lifestyle is savage... they made a funnel type exhaust manifold so it dump from each combustion chambers to the catalytic ... .. Saves gas ⛽ 👌 but no torque at mid range rpm.. .. the V6 Odyssey pass me all the time and my heart just climbs and I think I lose my breathe 🤭

As a general rule yes

@@speedlabchannel4452 Thank you for the video. I have classic car with Lexus 3UZ engine in it will a longer custom exhaust better than a pipe ends at the mid of the car? Also, what dimeter pipe exhaust you would recommend? Also, adding 2 mufflers will it help with back pressure or you recommend deleting the mufflers? - forget about the sound. Looking for more torque mainly. Many thanks!

4-211

4-1

@@speedlabchannel4452 thank u Sir Syd da best ka talaga.

I have a manufacturing engineering degree Which includes automotive

4-2-1 Unichip 30000

Ecu remap 25000 Exhaust magnaflow 32000

I'd go 421 to scavenge the mid and low end power. 4-1s are for engine that live at higher rpms (race track) less useful for stop and go traffic. Both good

I wanted to know the same thing

4-1 We have a long tube 4-2-1 that makes a lot of power BUT you will need to get Unichip inorder to make that power

@@speedlabchannel4452 about that sir for the headers and the unichip only how much will it totally cost?

@@mjmj9396 54000

Ty someone that actually give a real life comparison. Not just hypothetical or videos w/ exhaust. So ur saying 4-2-1 is best for performance. What about deeper more throaty sound? Is this true that if u have an LS which I've heard has more bottom end power then 4-1 would b best for you. I have a GSR top end power so 4-2-1 would be best option? Ive owned a 97 LS 4-1 and I loved that car sounded deep throaty before stolen. Then I got 2001 GSR chipped key thank God or it would of been stolen 5x by now. Welcome to Seattle. 4-2-1 it doesn't really feel all that different. Rn I have the 2 piece header which r smaller diameter. Then there's also length of 4 before it becomes 2. Also what about the ones that look like Ram horns? Why. Then what changing the length of one side like Subaru does to get that classic Subi sound. Whenever u get a chance or anyone plz lmk becuz I don't have the $ to buy both. And I love my car but just want a little more umpffff. Thanks for reading I know it's a novel sorry

4-2-1 with Unichip tuning

4-1 gamit ko 2zz tas sheeodog n1 muffler

Yes. The wrong kind of design

@@speedlabchannel4452 thanks for the reply. If the firing events are as usual, 1342 then does it follow that the exhaust gas pulses/pressure waves can assist with creating a vacuum for additional cylinder filling/volumetric efficiency improvement? I do agree with your overall point, just asking for clarification.

Skunk 2 Alpha header for Civic/RSX, it has a unique sound to it

its called non sequential 4-2-1. it act like a 4-1 with stepped tube.

@@beniirama4076 it is sequential, meaning 2 pulses go sequentially down each secondary (left left right right left left right right). The normal type would be a 360 degree 4-2-1, 1 pulse down each secondary every 360 degrees (left right left right)

4-1

@@speedlabchannel4452 thank you so much sir

Punta ka sa shop at bumili Sabihin ko sayo

that's fine, you know nothing and your comment also means nothing

Most cars yes power Fuel consumption no

⁠@@speedlabchannel4452for wigo 2016 does bolt on downpipe make power?

@@gba7806 headers, not downpipe

@@speedlabchannel4452 sorry my bad, does bolt on headers make power for wigo 2016

@@gba7806 ours does, others no

Check your other comment

Power and torque loss unless tuned by us. And only we can tune the vios

Oval muffler and mid silencer

How much sir ang abutin nito sa shop nio ung ganyan lang kasama intallation? sorry sa paulit ulit nming tanong :D

Paulit ulit nga tanong mo and di mo pa din sinasabi ano kotse

and ano pong size ng scav ang pwede sa honda city 1.5

@@royce4779 1.75” pipe 14” silencer 4500 Borla muffler 12500

Hindi

@@speedlabchannel4452 how about fuel consumption? Pang araw araw lang pero naka full exhaust no tuning, ok lang ba to? Plan ko talaga magpagawa sa inyo eh.

@@angelosalas1152 no change in consumption

6-2-1

☝️yes follow this idiot

4-2-1 is less than 1 inch... Intake then exhaust system. Maybe turbo last.. get on simulations

It’s a preference, not grounded in any science Just like perfume and soap

Wrong, I seen dyno comparison a 4-1 header made more peak power top end. 4-2-1 is good for low mid doesn't lose much up top I think it was a 2hp difference...alot of people are getting the 4-1 megaphone header for a drag car. Asp makes a nice header too

Ues

Cast iron is original Stainless is performance

Then 3-1 is the only option

@@speedlabchannel4452 sir sa g4 po ba unichip and headers kasam na ba dyno? magkano kaya magagasto po?

Dyno is included with Unichip Only MT vehicles can be dynoed

SpeedLab etuner Mindanao

@@speedlabchannel4452 sa Davao city to mismo?

@@jekpagatpatan1839 yes

@@speedlabchannel4452 yun ba yung sa toril?

@@jekpagatpatan1839 contact him

Happy heart attack