IAG Performance IAG-ENG-C886 IAG 800 FA20 Closed Deck Case Half Set - No Bore & Hone

It's no secret that the OEM Subaru case halves, or "block," aren't exactly the strongest. IAG has developed a process to greatly improve the strength of the OEM Subaru FA20 Case Halves to combat the effects of high cylinder pressures brought on by increased power and boost. Our proprietary "Closed Deck" System works by supporting the top of the cylinder in the weakest areas and prevents movement and expansion which can lead to cracks and failures. Despite the additional material supporting the cylinder walls, there is no concerns with overheating or coolant flow because the area around the middle of the cylinder still maintains the same coolant area. The custom IAG closed deck inserts are machined with holes for oil and coolant to pass through the same as stock. Each IAG 800 FA20 BRZ/FRS/GT86 Case includes machining for 1/2" head studs and a cylinder gasket "o-ring" groove to aid in head gasket sealing. If you're one of those people who prefer to do your own builds we now offer our legendary closed deck case halves for purchase separately. Simply install your crank, rods, and pistons to your own specifications and be confident that the case halves will take the power and prevent common cylinder wall failures. The IAG Closed Deck conversion is performed 100% in-house by our engineers and experts using state-of-the-art equipment. The IAG Closed Deck starts with a new OEM FA20 bare case. The case is loaded and fixtured to a 4th axis rotary indexer in our Haas VF4-SS CNC Vertical Machining Center. It is supported by the main journals using a precision ground 2-inch bar and tailstock which ensures the datum is the main journals. This method gives us a true reference point to perform all machining operations. A Rennishaw probe is utilized to check that the case is fixtured true, and once confirmed the machining process begins.

This Part Fits:

Year	Make	Model	Submodel	Notes
2013	Scion	FR-S	Base
2014	Scion	FR-S	Base
2015	Scion	FR-S	Base
2016	Scion	FR-S	Base
2015	Subaru	BRZ	Aozora Edition
2013	Subaru	BRZ	Base
2014	Subaru	BRZ	Base
2015	Subaru	BRZ	Base
2016	Subaru	BRZ	Base
2017	Subaru	BRZ	Base
2018	Subaru	BRZ	Base
2019	Subaru	BRZ	Base
2020	Subaru	BRZ	Base
2013	Subaru	BRZ	Limited
2014	Subaru	BRZ	Limited
2015	Subaru	BRZ	Limited
2016	Subaru	BRZ	Limited
2017	Subaru	BRZ	Limited
2018	Subaru	BRZ	Limited
2019	Subaru	BRZ	Limited
2020	Subaru	BRZ	Limited
2013	Subaru	BRZ	Premium
2014	Subaru	BRZ	Premium
2015	Subaru	BRZ	Premium
2016	Subaru	BRZ	Premium
2017	Subaru	BRZ	Premium
2018	Subaru	BRZ	Premium
2019	Subaru	BRZ	Premium
2015	Subaru	BRZ	Series.Blue
2019	Subaru	BRZ	Series.Gray
2016	Subaru	BRZ	Series.HyperBlue
2017	Subaru	BRZ	Series.Yellow
2013	Subaru	BRZ	Sport-tech
2014	Subaru	BRZ	Sport-tech
2015	Subaru	BRZ	Sport-tech
2016	Subaru	BRZ	Sport-tech
2017	Subaru	BRZ	Sport-tech
2018	Subaru	BRZ	Sport-tech
2019	Subaru	BRZ	Sport-tech
2020	Subaru	BRZ	Sport-tech
2018	Subaru	BRZ	Sport-tech RS
2019	Subaru	BRZ	Sport-tech RS
2020	Subaru	BRZ	Sport-tech RS
2018,2020	Subaru	BRZ	TS
2017	Toyota	86	Base
2018	Toyota	86	Base
2019	Toyota	86	Base
2020	Toyota	86	Base
2018	Toyota	86	GT
2019	Toyota	86	GT
2020	Toyota	86	GT
2020	Toyota	86	Hakone Edition
2017	Toyota	86	Special Edition
2019	Toyota	86	TRD Special Edition