Busting 10 More Subaru Modification Myths: The Truth Revealed 

459bhp car YOU mapped in 2017, stock intake pipe, stock fuel rails/regulator, still running perfect 6 years later. 418 vpower, 459 meth mix.

Love these videos Duncan, thanks for sharing 👌

You're looking a lot more comfortable in front of the camera Duncan; and your video quality is improving! Crack on! 🤩

Great videos, learning so much on this platform thank you for sharing your knowledge 🙏

Informative videos, thank you for sharing the good stuff

Excellent video Duncan!

Windage tray is just windage tray.. Agree it wont help surge from non baffled sump...

As always your time and knowledge is greatly appreciated. Paz y salud

Great job Duncan cheers

Love these videos. Very useful and informative. I’m a bit surprised that in either of the two myths videos you haven’t mentioned anything about the gearboxes. Opinions seem to be all over the place in terms of the ability of the wrx box being able to handle more than x bhp, the chocolate gears and things to that effect. Keep ‘em coming, great videos

Good one. on number 4, i find the stock one keeps tearing at the mouth over time, especially if you have to remove the engine evety so oft, that was my reason to get a silicone one. Learnt something on the injector bit, thank you. Keep going.

Great content! Regarding oem inlet.. did not change mine because I was worried about flow.. more about the 22 Year old plastic cracking where its hold against the turbo with the clamp 😅

I changed the original pump of my STI 7 from 2002 (200Mkm) for a Walbro 255 l/m, because after 20 years they tend to get tired, in addition I am in the process of changing the VF35 turbo, because it too was starting to get tired, for a slightly better hybrid model. I spoke with the turbo manufacturer and the mapper to act on the things that were worth it. The pink STI injectors are very reliable, the original regulator is very reliable too, the pressure sensor on the manifold may wear out, the interior rubber softens over time and may be causing the gauge to boost pressure. This is my experience😊

Fmic and Silicone hose, I only brought one for better and louder flutters 🎶 😂

Sir, thank you for your amazing insights. I am upset that I am not from the UK, otherwise my V-Limited would be on the way to your shop.

“I upset a few people last time. So… I’m going to do it again” 😅 Thanks for sharing!

Haven't upset me at all, this was a bunch of good advice 👍🏻 The thing I will disagree on is the 'oil baffle plate' in that I would call that a windage tray instead. It's purpose isn't to stop oil sloshing around in the sump, only baffles in the sump will do that.

The injector one is something ive heard alot, yet my Hawk STI made 404 on the STI blues :)

Top video as always, in my year of ownership ive gone from "i guess its like a 4cyl porsche" to knowing 90% of whats said about ej's and subarus in general is utter bs.. as specially the "mine blew up cos theyre crap" brigade, you mean you did an exhaust, decat, bov, intercooler without a tune and run tesco basic fuel?😂 Any stressed motor will wear out quicker than a kia thats driven slowly to the shops... but my god is my hawk fun now you've tuned it Duncan ❤

I wish i lived near your shop. Duncan I Would have my 2017 sti in there like yesterday.

Hey Duncan great video as usual. Any chance you could do a video on mods for a 2015 STI for circa 400hp, just bought mine couple weeks ago, hub dynod at 275, looks damn near stock from what i can see, only had grb bov and cat back

5.11 mins big turbo ? Sneaky peak at what’s coming up ? What else you hiding..lol.. Tk ez 👍 great as always

Loving the content and direction these videos follow... Also £2k for an STI bottom end.. Can you link please.. im on 155K now and may be in the market soon..

The only thing I wondering is about the va chassis injectors I think there short off the hop

Great video series. Regarding the factory knock-control, Short Version: consider replacing your knock sensor if it has over 200,000kms on it. Long Version: when my rebuilt engine (on full-time E85 fuel) was on the dyno, the old/faulty knock sensor picked up some false positives and pulled 11.5 degrees (max) timing. This sent coolant temps through the roof momentarily. I later sent a sympathy card to my exhaust valves. For the tune (or the "map" for the soap-dodgers) the maximum scope of knock-based timing r3tard was set at 4 degrees (temporarily 0.5 degrees for the vanity dyno chart). I installed a fresh knock sensor pretty soon after.

Hello sir, first I want to greet you and thank you for the content you upload. I have been learning a lot with your very explanatory videos. Along the same lines, I have a question. I have a practically stock 2005 Impreza WRX. The only modifications I have are a larger turbo and a free flow downpipe. Recently, my car was tuned, but the tuner told me that I need to change the fuel pump, injectors, and install a fuel regulator. My question is: can I change the fuel pump without needing an immediate remap? I ask because I am planning to buy all three upgrades, but I would like to install the fuel pump and fuel regulator myself since I have some knowledge that would allow me to install those two. However, I am afraid that if I change those, it might alter the current map of the car. I understand that changing the injectors does require an immediate remap.

Would upgrading the fuel rails for 450whp be recommended or would stock rail work well

What about installing STi pink injectors on a EZ30R? Will it need a remap? Stock brown injectors got 280CC of flow, I think.

I see alot of people delete the expansion tank that sits on the inlet manifold saying its not needed and makes it look messy and then a whole other bunch of people who say you cannot bleed the coolant system properly without it and get over heating issues. What's your take on it?

We want to run different sort of headers because of sound but is there anyway to keep the heat down with a tmic?

Hi Dunc I have a craig bellworthy td04 19t hybid turbo what is the best safe power on standard internals can I get on a standard 2000 with mods already fitted, (front mount)?( its not fitted yet) have an sti top mount at the moment on shell v power? thanks

Hi Duncan, I'm looking at buying an Impreza with a 2.1 stroker and it has the RCM baffled sump and the RCM baffle plate together. Is that a good thing? I'm presuming it is.

#1 I knew. Even the EJ255 will take more power but the heads will lift unless you change the head bolts

Seems like fmi is more effective for reducing heat soak

What heads where on the sti engine at that power?

Is there a big difference between wrx and sti headers and uppipe?...

Can you recommend a decent FPR? as eBay is full of 💩

You thought about doing a review / benefits of ecu, like the chaps upstairs? I would love to see a semi detailed vid about how it can help with engine health / power benefits / and maybe other additions, such as screens / dials u can plug in?