Subaru Type RA EJ25 Short Block Build Bundle For 04-21 STI, 06-14 WRX, 04-13 FXT, 05-09 LGT
IAG-KIT-0001
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The 2018 Subaru Type RA Short Block is known as one of the best STI short blocks from the factory. Did you know the 2019-21 STI received the Type RA Short Block? Many enthusiasts seek this short block as a cost-effective OEM plus style upgrade due to its strengthened piston design over earlier EJ25 STI offerings.
We put together a build package that many enthusiasts can utilize when replacing their original EJ25 short block with a Type RA. We start with a brand new Type RA short block directly from Subaru. Then we add an OEM engine gasket set featuring every gasket, o-ring, and seal required for installation. It’s so comprehensive you will have some items left over. Finally, we include a complete ARP 11mm head stud set, perfect for stock or OEM plus builds that will see performance modifications and additional boost.
Includes:
- Subaru OEM Type RA Short Block
- Subaru OEM Engine Gasket Set - Application Specific
- ARP 11mm Head Studs - PN# 260-4701
Installation Instructions
Installation Instructions
Fitment
Fitment

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$3,124.99
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got here in a timely manner, all parts are good, good afternoon sale support 10/10 will buy again from these guys
Does this engine require a break in procedure? And if so, what procedure or process would you recommend? Looking at having heads cleaned and decked and new timing components, not anything high horsepower, just OEM plus, thank you!
This short block would need to follow Subaru OE tech manual for installation and break-in information.
Hi, if I am running the type RA short block with heads from a 04 sti, would you use the head gaskets for a 2004 or a 2018?
We would recommend this gasket : https://www.iagperformance.com/subaru-fhi-cylinder-head-gasket-1-for-2007-14-subaru-sti-07-09-legacy-gt/
I was looking to use the Type RA short block kit in a 04 STI. Which water pump/timing belt kit would I get along with this setup if using the 04 STI heads etc?
You can take a look at our timing package here : https://www.iagperformance.com/iag-timing-belt-kit-with-iag-black-racing-belt-timing-guide-idlers-tensioner-for-02-14-wrx-04-21-sti("https://www.iagperformance.com/iag-timing-belt-kit-with-iag-black-racing-belt-timing-guide-idlers-tensioner-for-02-14-wrx-04-21-sti") Or we can build a custom package for you!
Hello, I have a couple of questions regarding the product. First, Do the ARP connecting rod bolts flex with the engine as it heats and expands as well as cools and shrinks? Second, What brand of connecting rods and piston rings are in this? Is it OEM Subaru, or is it another brand? Lastly, are there any reviews about the ARP cylinder head studs and their performance or lack of performance with the engine? Thank You!
Hello, this is an OEM Subaru factory short block with no modifications so it has all OEM pistons, rods, etc internally. There are certainly many reviews on the head studs as they are the most popular step 1 upgrade when rebuilding/replacing the engine.
On the picture it shows the type RA bundle with pistons inside but no where on the description does it says that it is included. Is this a build short block with all gaskets or just the case?
This is an assembled short block (pistons, rods, crank and bearings) included.