Mugen Civic Si THROTTLE BODY SPACERS P3 

220 hp at the wheels without even touching the valve cover is awesome if you ask me. Loving the content all the way from Australia.

I love how you guys are just excited with every car that goes though the garage, whether its a 600hp Corvette or a 200hp civic and anything in between. Much love from Indonesia. Edit: Spelling

Who would have thought that tiny piece would make 7 hp and 6 lbs ft of torque. Wild stuff.

You're work and service is bar none the best I've seen, amazing work always...seems like every car is yours and that's how all shops should be

Wow 220 whp all Bolt ons and no 3in exhaust just just amazing.👏👏👏 I can so relate to this build. Since I have my own 8th gen with similar mods can wait to see more

Good call on the coolant line bypass, did the sam thing to my 94 prelude h22

I have a AP1 and now just picked up a FA5 as a daily and im loving building both cars! keep up the good work guys love the content!

You guys are still using the nsx wallpaper i made 😊 im honored and this is why i love you guys, you respect love and appreciate your customers and viewers. I need to swing by one day and buy a new shirt cause ive lost a ton of weight and dont fit in the old one well now 😂

Great content. Keep up with the series type videos. The Integra and the Mugen have been fantastic.

Awesome to see you guys doing a & this gen was dying to see someone that know what they’re doing , do vlogs on these cars.. I love my 2008 four door Si

WOW , I Love this channel.....always great content and products hands down, I dont want one of these I need one of these!!! Keep up the great work

Definitely loving the content. Keep it coming! I have stoptech rotors on my car and they have performed flawlessly. This past fall I overheated them severely and they didn't warp at all.

Special guest star... Shoutout to my main man, Bruce!🙌 Those spacers look nice, btw. I'm sure George will love all those brake upgrades. The first mod I did on my last car was Stoptech brakes (I believe they were 355mm, nearly 14"). Great video as always, guys. Y'all take care and have a good Monday, if that's even possible.😉

Very Nice content guys from an old 8th owner (miss it too) noce séries from Québec Canada ! Pretty much effectivement for a pièce of aluminium, that's surprise me for a cheap modification that's pretty effective worth it for sure ! Thanks for demonstrate that's very work for real !

I need to bring my 8th gen to you guys. Im over and Land O Lakes FL. Gonna plan a trip to you guys soon.

They do work, specifically on log style manifolds such B series by helping the closest cylinders, in this case 3 and 4, by making air distribution more equal. The slight bend in the intake helps a bit but paired with a spacer even better.

Nice! The old GSR had the same concept with its’ intake-manifold that changed runner length (remember their funny snail looking intake manifolds?) Also, it’s not uncommon to experiment and change runner-lengths for ITBs and even Carbs to tune and adjust power curves in race cars.

UPS guy help line up the throttle body spacer. Great video guys. Keep it up.

Excellent series!

the smaller the engine that is n/a, the more beneficial bolt on mods are for them!! i got a 2015 1.8 with the r18 , and I put just a cai, with spacer, changed plugs, and it woke it up much more. this is even WITHOUT any exhaust work done or downpipe or anything. i cant wait to see what i can do with exhaust work, hondata tune and other stuff!

That's crazy for the amount that they cost. I know on the 8th gen page, there was always a commotion cause no one knew the before/after on these spacers. Would definitely love to buy one of yalls, if yall still have them in stock

Damn George, that thing sounds absolutely perfect!

Always enjoying ur vids keep it up!

John...I work with p2r and let me know if u want to try our thermal spacers which takes the aluminum a longer time to heat up which allows for less heat soak during runs. Let me know if u have any interest in our product. It would help George on track days

my k24 ep3 has honda accord cu2 320mm discs with 2pot calipers front only loved your video on intake/exhaust

10/10 would highly recommend making more. You just made a video with proof. Bet these damn things will sell like hotcakes! Hell I'm interested! But, I need one with a 72mm bore. Hope you guys make some. Most of the ones now don't look like they are that thick. I'm not sure what the dimensions are of yours, but I'd say it would be a solid idea.

I'm loving it as well!

Can't wait to see what a nice 3" LHT titanium exhaust yields, it has to happen! I'm sure you can make one quiet too

LHT does the best work, keep it up John

Dudee!! Im loving it also that is sweet i want one!!

You guys do amazing work. I love the attention to detail, no corners cut with LHT. John i was wondering if your throttle body spacers fit the 9th gen Si's as well?

Great video. Another suggestion for brake pads is Akebono

Great numbers!!! Car should be fun to drive now

Love those Hawk HPS pads. I run them on my daily driver. They're an OK track pad but they get greasy for me after about 15 minutes at my local track and need a cool down. I use Hawk HT-10 for the track now.

thank you for sharing I'm inspired .

This makes me miss my Si

Wow that’s pretty cool, I hope you have one. I would like to purchase one but bills come first 🥴

Would love to see something like this for an AP1 S2K!

Keep it going! Love the car!

Hey George make sure you keep that thing waxed. I had an 08 Si and they are known for clear coat issues where it fades and peels off. I didn't have the issue since I kept up with my waxing but just a heads up. It was actually a factory recall.

I got one of these spacers for my 09 Si. 160k miles k&n intake and after installing the spacer it’s like night and day driving it. Throttle response is much better, the vtech changeover is smoother and it doesn’t bog after the shift at redline. No tune and it’s pulls smoother, it’s amazing compared to what it was. Best $ I’ve spent on this thing

That's impressive. I guess a little intake tract lengthening doesn't hurt. I wonder what adding a larger, tapered bore would do.

Love the Mugen Si!!!

You can add a honda intake manifold insulated gasket and a j35 or j37 throttle body to it as well.

Great content

Have Jorge P from MaxBore do the throttle body and see if there is more to be gained. Enjoying the series.

Good to know thanks guys.👍🏽👍🏽👍🏽💰

Should try this on NA s2k to see if they also increase the hp. If so that's another item you can sell in the LHT TLC package.

14:39 higher gain at higher rpm, with sacrifice at lower rpm. The spacer at lower rpm cause power lag (because the air fuel mixture now get longer way to reach the chamber), therefore the engine do what it can to compensate (tell the injector to spray more)

PS can't believe you made that much HP with the spacer!!

Interested to see what a stack of 2 would do if one is +4-5hp compared to stock.

Sold. I’ll take one please!

Would the spacer make power with the k&n intake? Also it doesn’t loose peak power? I was always under the impression stock manifold was perfect

That infotainment screen on the Mugen Si is sick. Is there an install video of that?

Did you consider adding a plastic/phenolic spacer to see if it would further reduce the air temps? Did you bypass the coolant hose to the throttle? Not sure if it is fully needed where you live.

Fantastic and amazing results.... it appears there was absolutely no additional tuning, correct? just before and after? would agree with other comments... please do the same comparison on a s2000. I do wonder how much power can be attributed to the prior tuning, though.

Yo also that touch screen on the dash is awesome looking! is that a upgrade that could be done to a 2012 civic si?

So this illustrates with a couple bolt ons the engine likes a larger plenum 👍 Wonder what a ported manifold would do... 😉

This should have the same effect on my built b18c5 with a kraftwerks supercharger?

That’s amazing

What touchscreen are you guys using? Would love to get one for my Si

So will 2 spacers make 10 plus hp?

Any spacers left? And does the mm on the spacer need to match the exact size on the throttle body

Any of these throttle body spacers for an 04 si ep3? Stock

Stainless steel brake lines read mixed reviews having them on a daily driven car.

Would it be possible if you can test this on a s2000 f20/f22 engine?

Will it help on a F22 Ap2? Would be interested if it works

We have a 08 RDX, would these work?

way late on this. would the k20a3 get any help from the spacer?

What front lip does he have on there? It is not the same that came on my Mugen.

Hi John, Hi George, Great to see you back on the Magen. How much for the spacer?

Do you have anymore spacers by any chance for a 8th gen Civic? (FD2R)

Would this fit the 9th gen Si throttle body (if I do the RBC swap)?

Bruce! @ oca.....ups talk...

These fit all k series motors?

Any more of those throttle body spacers? I’d love one

I apologize if this question already been asked but what touch screen kit is that??????

any chance y'all still making these spacers?

Will they fit 04 ep3? If so how do I purchase?

You have any more spacers

Nice …Where can I get one And how much please let me know 2020 Honda Civic sport 2.0L Manual

Man, too bad I live in Indonesia. Wanna go to your shop. Just acquired FD2 but with K20Z2 150hp Any advice if I wanted to convert it to K20Z3's one beside RRC intake manifold?

I need this spacer for my si. How can I get this part? Thank you for taking off that front H. Nice clean car. Hopefully boost will be coming soon to match the looks.

Link to the pads, rotors, and lines?

Only reason it works is the engine wants more plenum volume. Effectively, that's what the spacer is doing, increasing plenum volume by roughly 57cc.

Please test out the 70mm mdx or rl oem throttle body.. I need to see what it makes and if it fits your intake.. Is the civic with a oem RBC or a RRc intake..maybe because its mugen its the RRC

Does spacers really work

What size are the spacers MM?

Would this fit on an FD2? If I recall correctly the Boomba for the K20Z fits the K20A. (๑╹◡╹)ﾉ"

so do you know if you add this type of mod to a 2012 civic si... will it cause the car to not pass emissions? here in the states i gotta go through emission testing like most states do... and it sucks cause stuff like exhaust... intake... i cant do that stuff because the car wont pass emissions... but yeah im curious if this little mod would do the same... will it cause you to not pass emissions? looking at it i dont see why it would not pass.... but i know even changing something as little as that can throw the car CPU into a loop and most the time you gotta go get it tuned and or use a flash pro to actually gain benefits.... just curious though if it will still pass emissions and also will you even gain HP just by installing or would you still need to get it tuned with a flash pro?

Will it work to on k20a3. actually I'd love to see a video on making power on one of Honda's slowest k series engine's.

For the throttle body water bypass you can use the S2000 heater plug instead of having a hose in the engine bay!

I want to buy a spacer, how do I go about that?

Do you need the honata flashpro to install the throttle body spacer

doesn't the correction factor of .99 vs 1.01 account for the difference?

What headers on George’s car

Paused at 1:10 Why don't you use StopTech brake fluid?

It said SUMbody else..... hahaha I laughed more than I should have....

OEM throttle body??

Can u try putting 2 spacers on top of each other?