Stage 2.5 FA20 Includes:
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Case Halves -Converted to Closed Deck using brand new Subaru OEM case halves
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Case Machining - Modified for improved oiling
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Case Machining - Bored and honed to 86.25mm
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Pistons -IAG-Spec 86.25mm 10.5:1 Forged Pistons, Ring Set, and 1.50" x 2.250" Chromoly Wrist Pins
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Connecting Rods -IAG-Spec H-Beam / ARP2000 Rod Bolts
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Rod Bearings -ACL or KING XPG
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Main Bearings -King XPG
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Crankshaft -New Subaru FA20 WRX / BRZ crankshaft
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Case / Main Bolts -Standard Subaru case bolts
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Hardware - OEM Oil Plug - preinstalled at the oil pan location.
Additional Options Available:
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Oil Plugs & Rear Main Seal - (x2) 11024AA141 Plug, (x1) 806792010 Rear Main Seal
Compression Ratio:
- 10.5:1 (2.0 lower than stock compression) on standard gasket thickness.
Power: The Stage 2.5 Short Block has a power output rating of 675BHP
*All IAG Short Blocks are balanced and blueprinted. This short block features a lower compression and is intended for forced induction applications.
Please review the PDF document below regarding installation, break-in procedures and warranty information.
PDF After Sale Document - Contains Shipping, Engine Care and Warranty Information