2021 Mustang: Stock Exhaust vs. Steeda X-Pipe & H-Pipe on the Dyno! 

THANK YOU!!!!!!!!!! LOL

Thankyou so much Cheers😊

Its a moot test anyhow, the sizing of pipe work in either seperate dual, H or X is different for a given baseline Hp. Just swapping an x and h or comparing to a true dual of same diameter is only giving you a sound comparison NOT a comparison of HP potential.

I have a H pipe and love that sound I don’t like the X pipe sound but it sucks we sacrifice a little.

@@1forddan done with correct pipe sizing there is no advantage to either

@@8power857 what do you mean if I have a Steeda H pipe I can make the rest of my exhaust bigger and make up the difference?

@@1forddan no necessarily bigger, that depends on the open header peak Hp. Careful setup and dyno trials have to be used to perfect any system. I can make up a test with full dual, x or h that will make whichever one i want look best! You cant just bang in whatever comes in a nice box and expect its correct for every combo, shelf stuff is typically made with 3 things in mind, profit, looks, to be better hp wise than stock, they are far from perfect. H pipe placement V collector length MUST be correct. H pipe diameter V its length is kind of important, pipe diameter after the H is very important, muffler type and tailpipe diameter(which is usually best slightly smaller) all need to be correct for your combo. If made correctly, h pipes make 'slightly' more peak hp and x pipes are more tunable making 'slightly' more average hp/tq in a narrow band around a given/selected a rpm. For a streeter choose whatever sound you like best. But realise that these youtube 'chuck on a h or x tests' are not showing you the full potential of each setup but are showing you only what a generic bolt on item does 'for the specific combo in the test'.

Yep.

100% agree. Just about to do H pipe for mine.

Do you not see the gains made over stock by the x pipe???

@tonyzackery I wasn't comparing anything to the stock mid-pipe, only comparing Steeda's X and H-pipes. The difference between the two Steeda mid-pipes is negligible. It's better to choose the one that sounds better to you, which most people agree that it's the Steeda H-pipe.

yep. this is why my cobra has an h pipe, two magnaflows, and a couple dynomax superturbos :D

I have a 2019 without active exhaust and want the H pipe, but it’s hard to tell how much louder it is on video. What % would you say?

@@RowlandsAdam it's really the pitch that's different. The X is more raspy...has a higher pitch than the H. They'll both be really loud. I posted a few clips on my page if you wanna hear the H at start up.

@@RowlandsAdam I have that setup and also posted a few clips on my channel. The H pipe is much deeper in person, cold starts are throaty af and sound withbactive is orgasmic. Deff try the Steeda H pipe, its a fantastic high quality piece.

Not one day that my x pipe doesn't make me crack a smile! Everyday is a good sounding day. 🙂

This

Question: Does the Tune make much difference on the Mid pipes? Switching one X to a H pipe , tune is the same or do you need to Re Tune?

@@foristjI don't think you would need to update a Tune when only changing the mid-pipe, however, I have no direct experience in tuning cars after an aftermarket build.

Thanks for the reply Steve, I agree with you that it shouldn't matter.@@StevoRado

Correct! No tune required for the mid-pipes!

"Quiet mode" is the first of 4 modes that you can activate with factory active valve exhaust. The others are normal, sport and track. Since I have an H-pipe on my 19 GT, it is great to use this so when I leave for work in the morning, I'm not bugging my neighbours. Why should it be illegal? It was developed by a Ford engineer for this very reason.

@@rod928s4 It was an attempt at humor, sport.

That's exactly what I thought too... that car should be over 400hp! Maybe because it's an A10?

I think it’s because they were limited to 6th and not 7th gear for a 1:1

@@TerpTaster no, that's not it. My GT on a different dyno in 6th gear on 91 octane got 405RWHP SAE. Dyno's are just VASTLY different.

This car didn’t rev as high as some do. Stock they seem to rev o 6500-7100. This one is a little low revving. This car would make huge gains from a normal tune as it would rev out to 7700. Some cars stock for whatever reason already rev out to 7100 and do t gain as much on a tune since it is already in the power and. Either way thisnis a great dyno to show the difference on same car same day same dyno. x pipe increase is insane.. these cars are at 6000+ tpms the whole race or highway roll so x pipe is a way better option if your racing as it gives tons of power up high and consistent

Nope, just a resonator delete! -Chris

The power is so little though and if you mod your car say Supercharger, Procharger, Turbos, tune, etc...... you'll get more torque with H and torque is what wins drag races.

Yes, it's also cutting off at 6800 rpm, making me think they are still hitting the limiter.

The drone is pretty negligible in both options really. There is a slight bit more in the H-pipe but nothing that would be noticeable to most people.

X is more high-pitched and raspy, H is deeper with a more old-school muscle car sound. In most cases, it's best to have a mid-pipe where the tubes cross to equalize the exhaust gases/pulses on either side of the engine.

@@steedaautosports great information! Thank you!

H-pipe

Tough to say with the different engine, but it definitely helps change the tone on the Coyote Mustangs! -Chris

Hi, There is a very slight amount, but going by the owner they say it is almost non-existent -Sam

Hey Rey - It will work since the Resonator Delete H-Pipe will mate up to what's left of your factory piping since the Corsa Sport Axle-Back connects further torwards the rear. Hope this helps! -Chris

@@steedaautosports thank you for the reply 🤘🏼

All Mustangs love long tube headers, x pipe, and 3 inch exhaust, especially boosted. It makes them louder and faster.

Hi, Actually, the drone with these is nearly nothing since it still has mufflers as well.

You only notice a difference when you put your foot in it. And when you put your foot in it, interior noise is usually not a concern.

Somebody get this guy a Prius

You gained more than 8hp. Thisbtest was done on 6th gear.

@@ZoubeirsWorld very true.

Hi, The 460hp rating is at the crank while the power we show on the dyno test is to the wheel. You can expect a loss of power from crank to wheel through the transmission and drivetrain.

There's a video on RU-vid called 2018 Mustang GT resonator delete first impressions by Tom the car guy. His video helped me decide which X-pipe to run with. Listen to his Mustang when he starts it for the first time with his Steeda X-pipe.

@@AStanton1966 I went with the mbrp

Their dyno is one that won’t let it reach full speed. It is revving out and madding the dyno out so that’s why you can see on the dyno it’s at like 6700ish. Peak power is around 7100-7300. Which is where you would get another 30-35 hp. Autos are around 405-430 stock so this is normal for such low rpm.

@@xGR1MxREAPERx Thanks for the info!

@@xGR1MxREAPERx idk, I just watched another stock gt dyno at 6500 rpm and it hit 408.6 hp.

@@justanotherone685 I can make your car have 350 or 425 stock lol, ju St adjusting parameters on the dyno. Don’t look into that too much. Look at the end result after mods. You can check your power with 1/8 or 1/4 mile times and speeds easily. With a certain weight car and xxx horsepower it should run xx.xx times etc. if you do the research on these cars from 2018-2021 they typically dyno 385-410 stock auto and 395-425 stock manual.

An X-pipe should bring out a more exotic and European sound -Sam