Thoughts on the Stock RA Block compared to your Stage 1/2 block? For the price point of around $1900 for the RA and the amount of power people are making with them its hard to beat for price for power.

Take a shot every time he says “Ok”. God damn!

Thanks for breaking it down, excellent info, engine building operation looks clean and streamlined, great job guy's

Good explanation of the the different rods used between the stage 2 an 2 tuff. Much appreciated video 👍

My IAG stage 2 block arrived last week! Car is st the shop now. It looked amazing and I am so excited to get my 18 WRX back!

IAG600 long block here!! Very nicely done video explaining everything. Loved the Dave Chappelle SLAP 😝

Thanks for making this video, it is very helpful. Thought I was going to want a Stage 2 or 2 Tuff when the time comes, but a Stage 2.5 is what I'll need.

Very interesting video. I have built quite a few performance engines using stock components with varying stages of modification to them. Only thing I missed in your video was balance checking on all the components.

literally the question i had in mind about these blocks at 19:45 thanks for asking and answering it

I hope my STi engine doesn't blow...but if it does...I know where to go. Great video.

Would love a video like this specifically for the ej20 short blocks and head options

cant wait for my stg4x to show up! excited to continue to push the limits

Been rocking the closed deck for two years now and still running strong. Just make sure you're doing proper maintenance with Motul fluids 👌

Old guy has an uncanny resemblance to the bad guy in the Saw movies lol.

thanks so much for making this video

Эти парни умеют строить правильные двигатели Subaru! Отлично.

Purchased a stage 2 10.5:1 FA20 for my turbocharged 86, can't wait for it to be done!

@IAG Performance, any reason the Stage 3 & Trojan blocks was skipped entirely? I understand that it shares a lot with the Magnum block but it would’ve been nice to hear the input on the copper sealing rings found on them which arnt used on any of the other blocks in the video. That plus it steps up to the Tri Beam Rod in the Stage 3. I think a video in the same format going over the difference between the Stage 3 Extreme, Magnum, & Trogan blocks would be a fitting addition to the channel.

would love to see a video covering long blocks and/or heads

Marylander and STi owner owner here. Think I need to take a trip up to the shop!

I have an IAG stage 1 pushing 480-500 wheel on a mustang dyno. It’s held up well so far and I just submitted my oil for analysis. I want to push this block a little more depending on the oil results. The cost was 3k for just the block. I have seen posts about 600 wheel on RA blocks but I don’t know what dyno they were on. I know the stage 1 is 500 BHP so we’ll see how it holds up for the long run.

You guys are the best

Would love to see a short video about the stage 3 Trojan and extreme , as the head gasket design is different.

I have a 2016 STI and I am lost in sauce about everything they are talking about 😔. Good thing I drive like a grandma and do all my fluid changes on time.

Love the stuff IAG make.

was looking forward to hearing about the Trojan

I just drive my wrx to hiking trails and to the grocery store. I think a type RA block would be sufficient. Seeing as it’s 2000 vs the 4000 that IAG is selling theirs for. You guys should make an RA block with upgraded pistons and bearings and sell it for 3000. 4000 is steep.

can you guys make a video explaining you long block you offer and what head step best for your short blocks ? PLEASE love this video

super informative, great info guys

Can you run all of these engines as a "stock" engine and still pass smog (CARB-legal)... I was just curious if it was possible to have an IAG engine that I can run as an OE-replacement but have the benefits of toughness/durability and the potential to increase power beyond 500hp down the road (if/when I move to a different state).

I don't even have a subaru and yet I'm a fan of IAG. Wish you guys built SR20 short blocks.

IAG OR BUSTTTT stage 2 block running strong here ! 20lbs

What about the Trojan and stg 3 xtreme? Why skipped them?

Need one of these 800bhp short blocks for my FRS!

I NEEED to start saving for a block

Are the shortblock names and bhp figures outdated since this video came out? The IAG website has different numbers associated with current ej blocks offered

Take a shot every time he says “you know”

I Plan on purchasing an Fa 20 stage 2 block and have you guys install on my 2018wrx I don't want to change my transmission.

seems high quality. Better than that vid I just saw of like 20 minutes of some guy from IAG stopping to get fast food in a 2022 WRX and showing how to fill the gas tank at a gas station. 23:00: says stage 2 has same block, pistons, procedures, but uses H-beam rods, then after that says that the pistons and rods have been upgraded. Which one is it?

Thanks for all the great information! I was watching a video by ThatDudeInBlue and a tech at Offtheline Performance said that once you separate the case halves you need a special machine and need to line hone it and that only like 3 shops in the county have (is that the machine at 8:02?), but you guys only use it to straighten the bearing holes on stage 4, so is it necessary to line hone it anytime you separate the block? Or are you guys able to pick and choose from all the bearings you have to find ones that match perfectly? I think I have a IAG assembled block in my car since 2012 (did you guys make a deal with Import Image Racing around then that allowed them to sell your stages of blocks under their name, but I pretty sure I remember they accredited you guys with doing all the work on the block.)

Are there long-term downsides to going closed-deck? I want a super reliable 400-500whp setup (generally on the 400 end of the spectrum), but am uncertain if the closed decks have inherent cooling issues or are prone to excessive wear.

I just spent way too much money getting a mostly stock build, with an old used bottom end, and forged Pistons and h-rods. The piston slap sounds atrocious and I was told it's completely normal. I'm still in the break-in period and I'm terrified about what will happen when tuning begins. If I'm lucky, she holds. Otherwise, you guys have my money booked for the next build. I wish I had seen your builds prior to spending the cash 😭 Your prices would have allowed me to do so much more, and with confidence.

If I install all CARB-legal parts/tune on a stage 1 - 2.5 engine, will the car still pass smog?

What about offering billet heads that change the exhaust ports angles over the factory restricted design?

Great video, but what is the point of forging your internals on a semi closed block, when the cylinder wall flexes under heat cycles and boost pressure. Which causes head gasket failure, to say you rate the semi closed deck at 500hp is really pushing it. Here in the uk, all good engine builders highly recommend close decking at 400hp. Some say even at stock power it should be closed decked due to the movement on the cylinder wall. Forging your engine won't stop head gasket failure. Interesting video though 👍

Are the stage 2.5 short blocks compatible with stock ecu's or no?

All of them

Hi Team, when having heads ported and the bolt holes opened to use 1/2 inch head studs. Do the heads then need to be clamped down to replicate the same level of distortion as if they where bolted down to the block in order to cut the valve seats correctly? I was told this by someone that had an issue with the valves sealing only after they had been clamped down on to the block. thought I would heck with you first as I have bought one of you IAG Shortblocks to suite 1/2 inch studs. Really value your advice with this

Have you guys developed your program for the Fa20 cylinder heads? If so what stages do you offer? I already have your stage 3 block, and my bare cylinders heads with all the goodies. I just need the assembly and machining. Ive checked your site and it does not offer any information. Also as the AOS is available for the BRZ/FA20 block

Is there a follow up video explaining the downsides to each block? It almost seems like if you had infinite money you would just get the stage 4 or even the X block since it didn't seem like there would be any negatives to using those blocks for a daily making 300 hp. Or is there downsides to streetability to each level?

thank you!

If I had a penny every time, I heard “Okay,” I would have a thousand dollars.

You should do same video for Fa20dit

When can we can get an fa series?!

can you put oem heads on iag stage 2 tuff block? car is 2016 STI

if I want to build a 350 whp wrx, which block suit for me?

So if the stage 1 block will work with the stock ECU factory tune, does stages 2,3,4 and CNC billet short blocks work with the stock ECU factory tune as well? I’m curious if all IAG short blocks can be drop in replacements for stock motor for use with stock tune.

Do you cryogenically treat your EJ25 billet aluminum closed deck stage 4 blocks? Do you offer or set up supercharging for the EJ25 also?

I have a question, if i got stage 2 or stage 3 fa20 motor of frs, was that straight bolt on? Then would i need to worry about dmv /smog cause i live in california

How do those case plugs add strength to the block?

Looking to make between 500-550 WHP on a FA20DIT WRX. Which block do you recommend for purchase?

thanks for the video

I've been looking at 2.5 block and the site states "Case Machining - Modified for improved oiling" but this was not mentioned once in this video from any block

Is there a way to make reliable 800whp on an fa20? Or just I just give up and go with another car

@IAG preformace do you guys do WPC treatments on any of your parts?

I bought a iag stage 4 short block closed deck stage 5 head also have a ets rotated turbo 30-900 which power hp would you recommend for daily and also fun drive ?

if im installing a built block and there is nothing wrong with the current block, is the timing chain and tensioners ok or should i replace them? (fa20dit)

Is the stage 1 for an EJ25 discontinued? Couldn't find it listed on the site

Which block should I go with if I plan on going around 500 whp... daily and sometimes racing it? And is it any problems going in the 03 wrx?

I just got an IAG 2.5 with 11mm 625+ CA head studs. I'm planning on making 620whp with it. I'm hoping that'll be enough to hold 33lbs of boost.

how many work hours does it take for a short block to be replaced with a fa build?

@IAG Performance is there max boost/PSI tolerances for these motors? Ideally looking for 25-30 PSI but not more than 500whp. By HP rating alone stage 2 tuff would work, but would the stage 2.5 be recommended because it's a closed block?

Need to make a block that can hold 1,500 whp lol. That'll be nice to see a EJ25 with 1,500 whp.

Will/Did you ever did a 3.6 H6 engine build?

I have a sti 09 hatchback that needs new motor, what stage would you recommend if i want to use it as a daily but also want it to be fun, I'd like something between 390 and 500 HP? Thank you in advance

Can I order a Stage 2.5 with the +2mm rod/piston combo? I really want the extra RPMs but I don't want firelock gaskets.

I have a 2007 subaru impreza 2.5i non turbo I dont know what iag block can i use and heads or motor mounts ! Any help? Cant find nothing for the 2.5i i really want to put some power down with my car thanks.

Witch IAG block is right for u?? Any of them if they was cheaper lol...sorry guys but way too expensive with import charges

When will the FA24 block series be available?

Hey friends I need a recommendation. I bought a Subaru WRX STI 2012. But it consumes too much oil. I asked the previous owner if he knew something about it and he said he had a blowby. well he cheated me .. but he told me that I had to put a forged motor short .... do you think that if I put only forged pistons and rings on it, I would solve the problem. or do I have to put all the iag short block. ??? what dou you recommend.????

Okay so probably a dumb question or just not financially smart choice but can you run the series x for a daily???

So what would be the best bang for the bucks for a 500 hp block??

In regards to the ej20 magnum, would ej20g (1998 wrx) heads be fine to use, or would you recommend 205/207 heads? Not sure what power I want to make yet, but probably around 450-500bhp.

Hi can you build EJ20 natural aspirate non turbo engine can do close deck short block?

A really different question , you guys ever think you'd branch out into EZ, EG subaru 6 cylinder blocks ??

My question is I want to build a block, including heads. I’m sure that you could imagine a lot of questions. 2.5 tuff and what heads would be the best bet.

what gasket can be used for the iag stage 2 tuff ?

At what power level are the stock sti heads gonna need built

@iag, when are you going to be offering fa24’s?

Do you ship to Oahu?

Stage 1 block for an off-roading FXT?

Do you provide Cryo and or WPC treatments?

he looks like the antagonist from saw the old guy

You didn't really touch on over building blocks like you said you did in this video and then just saying get ahold of us and ask us questions doesn't really work. I have had one guy at your shop go above and beyond with all of my questions and orders. I still have yet to buy a part that I haven't had an issues with. With that said you have always made it right but after pulling teeth which hurts because I'm a huge fan.

Can you guys do video for your fa 20 stages

I have assembly Line production skills , any job openings? Willing to relocate 😃

Hopefully you have those stuff for FA20DIT as well..

One that can hold 25-27 pounds of boost and take extreme heat of the Arizona desert 🌵

What's the highest mileage you have seen on a built block

do you have a fa20 video?