Body

• Body, mounting flange and secondary outlet cover are constructed of 6061 T6 aluminum.
• The body is hard anodized for additoinal strength.
• The primary outlet is rectangular in shape to provide maximum cross sectional area for venting pressurized air as quickly as possible.
• The secondary outlet cover can be removed to enable partial vent to atmosphere or full vent to atmosphere modes.
• Unit height is only 3.5 inches from base of flange to top preload adjuster,allowing it to fit into the tightest of locations.
• Body to mounting flange interface is o-ring sealed, allowing flanges of different shapes to work on multiple applications.

Piston

• Lightweight aluminum piston allows faster reaction time than heavier pistons
• The aluminum piston has been hard anodized and impregnated with Teflon to provide smooth movement, reduce surface wear and minimize maintenance.
• Rounded piston profile smooths air flow as it passes through they cylinder.
• The rounded piston profile mates with a rounded piston seat for superior sealing when the BPV is closed.
• Tight tolerance o-rings are used to seal piston to cylinder bore properly at normal engine operating temperatures without sacrificing piston speed.

Preload Adjuster and Spring

• Adjuster allows adjustment of spring preload for fine tuning release pressure
• Spring and spring seat are constructed of 303 stainless steel.
• Spring preload adjustment mechanism and fasteners are stainless steel.

Operation

• Valve vents pressurized air very quickly due to lightweight components, port shape and low sliding friction.
• Unique exhaust sound due to speed of air release.
• Construction materials make the XLE BPV compatible with alcohol/water injection due to inherent corrosion resistance.
• Lighter than most aftermarket BPVs and BOVs.

Full Recirculation - Outlet is plumbed back into the intake tract pre-turbo. This configuration provides the best driveability with stock based MAF systems. This configuration generates the least amount of noise.

Hybrid Mode - Outlet is plumbed back into the intake tract pre-turbo and the auxiliary port cover is removed. When the piston is more than 30% open, the auxilliary port is opens, audibly venting to atmosphere. Less than 30% open results in full recirculation to improve driveability.

Full Atmosphere - Outlet and auxiliary port are open to atmosphere. Recommended only for MAP based air metering. This configuration generates the highest sound levels.

Spring Preload - Spring preload determines the pressure differential across the BPV piston required before the BPV opens and releases the pressurized intake charge. The COBB XLE BPV can be adjusted by loosening the locknut and turning the allen-head shaft clockwise for more preload or counter-clockwise for less preload. Once preload is set, the locknut is retightened and ensures the adjustment is secure.

SUBARU		NISSAN		MAZDA
2004 - 2009	Impreza STi	2008 - 2010	GT-R	2007 - 2010	MAZDASPEED3
2002 - 2009	Impreza WRX
2005 - 2009	Legacy GT
2004 - 2009	Forester XT
2009	Impreza 2.5GT

Exlusively Sold at COBB Tuning Facilities - The COBB Tuning By-Pass Valve is a very limited production run and therefore will only be sold direct from our COBB Tuning Plano and COBB Tuning Plano facilities. Please call now to order your COBB Tuning XLE BPV before they sell out.

COBB Tuning Surgeline	COBB Tuning Plano
(503) 670-9500	(214) 291-3020
16580 SW 72nd Ave	1200 Placid Ave, Suite 550
Portland, OR 97224	Plano, TX 75074

YEAR	MAKE	MODEL	PART #	PRICE
2004 - 2009	Subaru	Impreza STi	712650	$295.00
2002 - 2007	Subaru	Impreza WRX	712650	$295.00
2008 - 2009	Subaru	Impreza WRX	724650	$295.00
2005 - 2009	Subaru	Legacy	724650	$295.00
2004 - 2009	Subaru	Forester XT	712650	$295.00
2009	Subaru	2.5GT	724650	$295.00
2006 - 2009	Mazda	MAZDASPEED3	771650	$295.00
2008 - 2010	NISSAN	GT-R	7C1650	$595.00