**The Thrill of Installing a 4-Into-1 Header on a Miata**

So, since a 4-into-1 style header is the best for making peak horsepower, that's what we went with, 'cause we're chasing that 109 number. And you think it's gonna make that five power? Dude, it's making five for sure. Six? Maybe. Seven? Who knows, dude, you don't know. I'm gonna put these nuts on, we'll tighten them down and then that's about it. Pretty easy install. A-okay with that.

(funky beat)(cranking) Golden hour, bro. Kay, that's everything. Let's put it on the ground, see how it sounds. The moment of truth. (door slams) I disconnected the battery. (laughs)(door slams) Are you ready? (engine revs)(engine revs) Sounds pretty similar, added a little quick rev. Now let's see what she sounds like under-load on the road. That's what really counts, you know? (engine revs)(engine revs deeply) It sounds great. It only took about half a day to install and it looks sick. So now it's time to see if there's any proof in this pudding, so we gotta go back to the Dyno and see if we're making that 109 horsepower.

(upbeat pop music)

All right, so me and all my hair made it back down to EF1 Tuning inside of EF1 Motorsport with the Miata with the new header on to see if this thing is worth it. Remember, we came down here before we installed the header, and we made 104 horsepower, and I was saying that if we make five extra horsepower with the header, then it's worth it. And if we make ten, then it's very worth it. But if we make less than that five, I'm not sure if it's so worth it.

What do you think we're gonna land on? (drilling) Honestly, I kind of feel like 109's gonna be it. What do you think? (drilling) I'm gonna say 111. Nice, optimistic. Cool, all right, well there's only one thing left to do.

(suspenseful beat)(revving)

Okay, so we've only gained around a horsepower in terms of peak power, but we have gained a little bit of mid-range power where we had a bit of a dip in our power graph. Now it stays a lot flatter, so you get a little more area under the curve, which is really important, so peak power? Not quite there yet, let's give it another run. Maybe we'll hit that 109, but I'm starting to doubt it. (engine revving)(laughs) All right, two horsepower. We're talking 106 now. It ain't no five, but hey, you know what? That's why we gotta turbo this thing. You can see the headers basically changing color in front of your eyes, they're a lot bluer now.

I'm kinda worried for if we're gonna max out the Dyno on this one. All right, last run, last chance for 109. (engine revving) Oh, closer, 107.5! We've made about four horsepower, which that's on the cusp of what we were talking about. It's in the ballpark, and if we say how good they look is worth one horsepower, then baby, we're right on track, right? Kind of.

These are the mental hoops you're gonna have to jump through if you really wanna get into cars, 'kay? You gotta justify this stuff somehow. Yeah, we didn't hit our magical five horsepower, but we did add a lot of mid-range and upper-range torque. We added some cool looks, it sounds awesome, it wasn't very expensive, and it was easy to install. So okay, we didn't hit five horsepower, but I'm still gonna say it was worth it.

Sorry, dropping bombs, baby. Still worth it, didn't hit the horsepower, doesn't matter. It's not about four or five horsepower; it's about the fun you have installing it, driving it, and coming down to your buddy's shop to Dyno it. So we had fun, it looks cool, sounds great, worth it.

On that bombshell, that's gonna do it for us this week. Thank you guys so much for watching. Follow me on Instagram @zachjobe, follow Donut @donutmedia, and we'll see you guys next week.

WEBVTTKind: captionsLanguage: en- These headers cost $400.They should take abouthalf a day to install,and they're gonna look supersick in the engine bay.But, none of that really matters if theydon't even make-- ♪ More power baby ♪- So today, we're gonna find outif after-market headers are even worth it.I'm Zach and this is Money Pit.(electronic trilling)Big ol' thanks to Vincero Watchesfor sponsoring this week's episode.You know here on Money Pitwe like quality and deals.Well, Vincero makes highquality watches and accessoriesat an affordable price.I like this sleek black-on-black one,but they come in a variety of bold colors,and they're waterresistant up to 100 meters.And, I mean, look at this thing.You're not gonna find a better watchfor under $200 that looksand feels this good.There's a tachymeter on the outer bezel.It's got these sick sub-dials.If you're looking for that real quality,go read their comments, all22,000 five-star reviews.You'll see what I'm talking about.Go on, head on over tovincerowatches.com/donutmedia.They're having a huge sale,so you can get 20% off and free shipping.So please support thebrands that support Donut,and treat yourself toa good old timepiece.(engine revs)We made it, see how much this puppy makes.So with a naturally-aspirated engine,one of the quickest and easiest waysto make some extra power, of courseafter you've done anintake and an exhaust,which we've already done on the Miata.One of the next easiest and cheapest waysto make some power is a set of headers.So today, we drove down to my old buddy's,at EF1 Motorsports in Long Beach,to strap the Miata to theDyno and see what it makes.- What are you thinking?- Honestly, 115 I think is my guess.120 would make me really happy.As long as we're inthe three-number range.(funky bass beat)(engine revving)Triple digits, 102.8.We'll round that up to103, it's triple digits.We're also gonna want to payattention to our torque curve,'cause it might change a littlebit with our new headers.We might lose a little torque down lowwith the new headers, and wemight gain some in the middle.So we're gonna pay attention to that, too.All right, so this is the last pull.We're gonna rev it to 7,000,we were only doing 6,800.We're gonna see if thoseextra 10 or 15 horsepowerare living in those last 200 RPMs.(engine revving)They didn't live there, but we tried.104.4, you know what?It's triple digits. It's notthe 115 I was hoping for,but I'll take it, honestly, I'll take it.Maybe we can make 115 with a new header.That would be sweet.I think if we make fivehorsepower with the header,that makes it worth it, butif we make 10 horsepowerwith the header, thatmakes it pretty sweet.If I just make onehorsepower with the header,not worth it.(metal clanking)So with that, it's time to drivemy 104 horsepower turdhome, strap a header to itand see how much more power, if any,we can make in about half a day.Then we'll come back hereand do this all over again.Shall we pull them?(funky beat)Woo, 'kay, big numbers.We got our baseline, 104 horsepower.So that makes our target 109 horsepower,but before we go tearing into this thingtrying to make them buff horses,let's take a listen and seehow things sound right nowso we can compare to our new headers.(engine revving)All right, now that wegot it nice and hot,let's go touch it.(drilling)(clanking)Ah, heat shield, out the way.There's our factorymanifold, not too shabby.Now let's get it out.(slow jazz beat)(drilling)(cranking)So this thing's beencoming apart pretty easy,which is awesome, but ifyou're fighting your hardware,it can be really helpfulto let them soak overnightin PB B'laster or somesort of penetrating oil,and then if that's not enough,you gotta bust out the torch.'Kay, that's the last one.(crash)Now the real test.Let's see if we can get thisthing out in one big piece.If we can, that's great.That means we can probablydefinitely get the new one in.(clattering)- Oh, shit.- Oh, shit.(clattering)(laughs)No problem.New one's gonna go in like butta.You know what?Not bad, Mazda, not bad.Done good for 25 years,but it's time to go.(thud)My hose.So while we're in here,I figured we might as wellreplace all of our exhaust studs.To do that, it's pretty easy.You can use two nuts tojam against each otherso you can remove the stud,and then you can install yournew studs just the same way.Jam two nuts on there,and then you can tighten in your studs.Time to see if we can slam this puppy in.- Think it's gonna go in?- Yeah, if I can get that stock one out,there's no reason this shouldn't fit.(clanging)Yeah, oh.I love it when a plan comestogether. That looks cool, too.So a high quality header likethis one from Roadster Sportis made out of quality materials.The welds are gorgeous,they don't look like they're gonna crack,and the flanges are reallythick and perfectly flat.So that's where you'llfind the differences,really in quality.But how are these thingssupposed to bring usup to that 109 horsepowernumber that we're targeting?Or hopefully higher?It is just like how anexhaust gains you power.Headers are supposed toflow a little better,and they help scavenge the exhaustout of the combustion chamber.We talked about that in our exhaust video.Go check that out if you wannaknow more about scavenging.Basically, it's like sucking the exhaustout of the combustionchamber, which is helpful.So in theory, that's how these make power.It doesn't matter if it'sa 4-cylinder, a 6-cylinder,an 8-cylinder, as long asit's naturally aspirated,headers can be a goodway to make some power.So if you're shoppingfor headers for yourselfyou might come across acouple different styles.What we've got here from Roadster Sport,this is called a 4-into-1,it's pretty simple.All four primaries collectinto one and then keep going,or you might see a 4-into-2-into-1,or what's called a tri-y,'cause there are three ys in the header.A 4-into-1 is generally gonnabe the best for scavengingand flow at high RPM,so these are the best formaking peak horsepower,but you can lose a little bitof low-end and mid-range torque,which can make it feel a little worse,but a tri-y is generallypretty good all around,where you can gain mid-range torque,but you might sacrificesome top-end power.And so since a 4-into-1style header is the bestfor making peak horsepower,that's what we went with,'cause we're chasing that 109 number.- And you think it'sgonna make that five power?- Dude, it's making five for sure. Six?Maybe. Seven?Who knows, dude, you don't know.I'm gonna put these nutson, we'll tighten them downand then that's about it.Pretty easy install. A-okay with that.(funky beat)(cranking)Golden hour, bro.'Kay, that's everything.Let's put it on theground, see how it sounds.The moment of truth.(door slams)I disconnected the battery.(laughs)(door slams)Are you ready?(engine revs)(engine revs)Sounds pretty similar,added a little quick rev.Now let's see what she soundslike under-load on the road.That's what really counts, you know?(engine revs)(engine revs deeply)It sounds great.It only took about ahalf a day to install,and it looks sick.So now it's time to seeif there's any proofin this pudding, so wegotta go back to the Dynoand see if we're makingthat 109 horsepower.(upbeat pop music)All right, so me andall my hair made it backdown to EF1 Tuninginside of EF1 Motorsportswith the Miata with the new header onto see if this thing is worth it.Remember, we came down herebefore we installed the header,and we made 104 horsepower,and I was saying that ifwe make 5 extra horsepowerwith the header, then it's worth it.And if we make 10, thenit's very worth it.But if we make less than that five,I'm not sure if it's so worth it.- What do youthink we're gonna land on?(drilling)- Honestly, I kind of feellike 109's gonna be it.What do you think?(drilling)- I'm gonna say 111.- 111?Nice, optimistic.- Mhm.- Cool, all right, well there'sonly one thing left to do.(suspenseful beat)(revving)Okay, so we've onlygained around a horsepowerin terms of peak power, butwe have gained a little bitof mid-range power wherewe had a bit of a dipin our power graph.Now it stays a lot flatter,so you get a little morearea under the curve,which is really important, so peak power?Not quite there yet,let's give it another run.Maybe we'll hit that 109,but I'm starting to doubt it.(engine revving)(laughs)All right, two horsepower.We're talking 106 now.It ain't no five, but hey, you know?What are you gonna do?That's why we gotta turbo this thing.You can see the headersbasically changing colorin front of your eyes,they're a lot bluer now.That looks sick.- I'm kinda worried for if we're gonnamax out the Dyno on this one.- All right, last run,last chance for 109.(engine revving)Oh, closer, 107.5!We've made about four horsepower,which that's on the cusp ofwhat we were talking about.It's in the ballpark, and if we saythat how good they lookis worth one horsepower,then baby, we're right on track, right?Kind of.These are the mental hoopsyou're gonna have to jump throughif you really wanna get into cars, 'kay?You gotta justify this stuff somehow.Yeah, we didn't hit ourmagical five horsepower,but we did add a lot ofmid-range and upper-range torque.We added some coollooks, it sounds awesome,it wasn't very expensiveand it was easy to install.So okay, we didn't hit five horsepower,but I'm still gonna say it was worth it.Sorry, dropping bombs, baby.Still worth it, didn't hit thehorsepower, doesn't matter.- Light him up.- Light him up!Light me up in he comments!(laughs)No, you guys agree it's worth it.It doesn't matter, it's notabout four or five horsepower.It's about the fun you haveinstalling it, driving itand coming down to yourbuddy's shop to Dyno it.So we had fun, it lookscool, sounds great, worth it.On that bombshell, that'sgonna do it for us this week.Thank you guys so much for watching.Follow me on Instagram @zachjobe,follow Donut @donutmedia,and we'll see you guys next week.