ISR Performance O2 Sand Cast Turbine Outlet - Nissan SR20DET Factory Nissan SR20DET O2 housing are extremely restrictive, ISR Performance Cast 3" O2 Housing are substantially larger allowing the exhaust to flow more efficiently compared to stock ISR Performance Cast O2 Housing is a true 3" O2 housing as Most other O2 housings are 2.7". What’s in the Box:

• 1x O2 Sand Cast Turbine Outlet
• 1x 5 bolt exhaust gasket
• 1x 3 bolt exhaust gasket
• 3x Exhaust studs
• 3x nuts
• 3x lock washers

  ** All ISR Performance Products are Designed for Off Road Use Only **