Recently added item(s)
We couldn't find any results
- Use different keywords
- Double check your spelling
- Start with something less specific - you can refine your search results later
- Try changing some of your filters below:
Search term:
You have no obligation to purchase the product once you know the price. You can simply remove the item from your cart.
You have no obligation to purchase the product once you know the price. You can simply remove the item from your cart.
- Home /
- IAG Stage 4 TUFF Closed Deck Short Block
IAG
IAG Stage 4 TUFF Closed Deck Short Block
2004-2021 STI / 2006-2014 WRX
Ships for free in the 48 states
SKU: IAG-ENG-1452We price match!
Average time to ship: 36 business days
IAG Stage 4 Tuff EJ25 Subaru Closed Deck Short Block 2015-2021 Subaru STI
Details
IAG Stage 4 Tuff EJ25 Subaru Closed Deck Short Block 2015-2021 Subaru STI
SPECS:
- Brand new Subaru OEM case halves converted to Closed Deck
- IAG Fire-Lock receiver groove machining
- Bored and honed to 99.75mm
- IAG-Spec JE FSR 99.75mm 2618 Forged Pistons
- .250" / .927" H13 Performance wrist pins, clips
- IAG Spec Tri-Beam +2mm connecting rods
- ARP625+ Rod bolts
- ACL Rod and Main Bearings
- Standard new Subaru Nitride Treated 2017+ STI crankshaft
- Standard FHI Subaru case bolts/main bolts
- Machined to accept 14mm head studs (head studs sold separately)
- Requires IAG Fire-Lock Head Gaskets
- Rated to 1000 HP with supporting modifications
NOTES:
- 8.2:1 on B, V, and W cylinder heads (EJ257)
- 8.5:1 on D cylinder heads (EJ255)
RATED TO SUSTAIN HIGH LEVELS OF POWER
The IAG Performance Stage 4 Tuff EJ25 Subaru Closed Deck Short Block is a pre-assembled short block assembly performed by one of the leading power innovators in the Subaru motorsports community. This block begins with brand new Subaru 2.5L case halves that are assembled at IAG's facility using their state-of-the-art milling machines. These are machined to accept IAG's closed-deck inserts that transform the deck into a solid deck. The case halves then get machined for IAG's Fire-Lock head gaskets that are loosely derived from diesel technology where a counterbore step is machined around each cylinder bore to allow specialty-sized fire rings to drop into the machined area and head gasket bores.
The Stage 4 Tuff case is then drilled to accept 14mm head studs that are combined with the IAG Fire-Lock head gasket set which greatly reduces the chances of head gasket failure during high-cylinder pressure scenarios. The clock is then deck plate bored and honed to 99.75mm using IAG's in-house Sy=unnen SV-30 which is the most advanced automotive cylinder hone available. The engine is then assembled using the strongest ingredients that can sustain up to 1000 HP with the right supporting modifications, which is ideal for those of you looking to make a large number on the dyno, drag strip, or to endure high-stress conditions with road racing or rally.
Additional Information
Installation Instructions | None |
---|---|
Additional Warranty Information | None |
IAG Stage 4 TUFF Closed Deck Short Block / IAG-ENG-1452 Fits
0 customer reviews
|
Ease of Installation |
---|---|
|
Fit / Quality |
|
Overall Satisfaction |
You have no obligation to purchase the product once you know the price. You can simply remove the item from your cart.
You have no obligation to purchase the product once you know the price. You can simply remove the item from your cart.
Upload images for this product
Feel free to share pictures of your vehicle with this product!