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IAG STAGE 4 EXTREME EJ25 CLOSED DECK CASE - 14MM H.S.M., FIRE-LOCK, PINNED + LINE HONED, ARP CASE BOLTS, 99.75MM BORE & HONE - FOR SUBARU WRX, STI, LGT, FXT

$4,299.99
IAG-ENG-1829
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The Stage 4 Extreme is IAG's strongest and most prepared EJ25 Closed Deck offering. The case halves are split and the main webs are...

IAG STAGE 4 EXTREME EJ25 CLOSED DECK CASE - 14MM H.S.M., FIRE-LOCK, PINNED + LINE HONED, ARP CASE BOLTS, (NO BORE / HONE) - FOR SUBARU WRX, STI, LGT, FXT

$3,959.99
IAG-ENG-1828
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Please Note: Overbore must be performed (99.75mm is the preferred bore) before assembly! The Stage 4 Extreme is IAG's strongest and most prepared EJ25 Closed...

IAG STAGE 4 TUFF EJ25 CLOSED DECK CASE W/ PLUGS - 14MM H.S.M., FIRE-LOCK, 99.75MM BORE & HONE - FOR SUBARU WRX, STI, LGT, FXT

$3,299.99
IAG-ENG-1826
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The Stage 4 Tuff is one of IAG's strongest and most prepared EJ25 Closed Deck offering. IAG machines the case halves assembled together in...

IAG STAGE 4 TUFF EJ25 CLOSED DECK CASE W/ PLUGS - 14MM H.S.M., FIRE-LOCK, (NO BORE / HONE) FOR SUBARU WRX, STI, LGT, FXT

$2,999.99
IAG-ENG-1825
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Please Note: Overbore must be performed (99.75mm is the preferred bore) before assembly!IAG's Stage 4 Tuff Closed Deck EJ25 converted case halves are the...

IAG STAGE 3 MAGNUM EJ25 CLOSED DECK CASE - 14MM H.S.M., FIRE-LOCK, 99.75MM BORE & HONE - FOR SUBARU WRX, STI, LGT, FXT

$2,999.99
IAG-ENG-1819
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IAG's Stage 3 Magnum Closed Deck converted case halves were created to be the most affordable and cost-effective short block modification for EJ25 Subaru...

IAG STAGE 3 MAGNUM EJ25 CLOSED DECK CASE - 14MM H.S.M., FIRE-LOCK, (NO BORE & HONE) - FOR SUBARU WRX, STI, LGT, FXT

$2,649.99
IAG-ENG-1818
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Please Note: Overbore must be performed (99.75mm is the preferred bore) before assembly!IAG's Stage 3 Magnum Closed Deck converted case halves were created to...

IAG STAGE 3 EJ25 CLOSED DECK CASE - 1/2" H.S.M., 99.75MM BORE & HONE - FOR SUBARU WRX, STI, LGT, FXT

$2,749.99
IAG-ENG-1813
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IAG's Closed Deck converted case halves were created to be the most affordable and cost-effective short block modification for EJ25 Subaru turbo engines. The...

IAG STAGE 3 EJ25 CLOSED DECK CASE - 1/2" H.S.M., (NO BORE / HONE) - FOR SUBARU WRX, STI, FXT & LGT

$2,429.99
IAG-ENG-1812
All Best selling products Case Halves Commerceinstruments Best Selling Products Engine Build Components IAG Performance New products Shortblocks
Please Note: Overbore must be performed (99.75mm is the preferred bore) before assembly!IAG's Stage 3 Closed Deck converted case halves were created to be...

IAG STAGE 3 EJ25 CLOSED DECK CASE - 11MM H.S.M., 99.75MM BORE & HONE - FOR SUBARU WRX, STI, FXT & LGT

$2,549.99
IAG-ENG-1811
All Best selling products Case Halves Commerceinstruments Best Selling Products Engine Build Components IAG Performance New products Shortblocks
IAG's Stage 3 Closed Deck converted case halves were created to be the most affordable, cost-effective short block modification for the Subaru EJ25 turbo...

IAG STAGE 3 EJ25 CLOSED DECK CASE - 11MM H.S.M., (NO BORE / HONE) - FOR SUBARU WRX, STI, FXT & LGT

$2,199.99
IAG-ENG-1810
All Best selling products Case Halves Commerceinstruments Best Selling Products Engine Build Components IAG Performance New products Shortblocks
Please Note: Overbore must be performed (99.75mm is the preferred bore) before assembly!IAG's Stage 3 Closed Deck converted case halves were created to be...

IAG / Willall Billet Aluminum EJ25 Subaru Case Halves For WRX, STI, Forester XT & Legacy GT

$11,549.99
IAG-ENG-1600
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Using the same world-leading technology found in Willall’s incredible billet GT-R block, the billet EJ case seeks to change the Subaru performance tuning market...
All products sold by Patterson Performance Parts, LLC are intended for off-road and/or competition use only. By purchasing aftermarket products from us, having us install the products, or both, the customer takes full responsibility for any use, and/or misuse of the product; and agrees that Patterson Performance Parts holds no responsibility for any consequences, legal, or other, of such use and/or misuse.
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