Designed, tested and validated for assured compliance to meet CARB standards, Walker? CalCat? Manifold Catalytic Converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles and delivers a precise OE-style fit. CARB COMPLIANT — For use on OBDII vehicles, 1996 and newer and non-OBD 1995 and older. Legal for sale in CA, CO other states requiring CARB-compliant replacement converters. Consult your state��s aftermarket converter regulations. CONSISTENT PERFORMANCE — Utilizes a precise OE-style coating process to apply catalyst material to the substrate, providing consistent performance for assured emissions compliance DIRECT-FIT DESIGN — Bolt-off, bolt-on OE-style converter with integrated manifold assemblies that attach directly to engine cylinder head and match all downstream connections STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and stainless-steel body with aluminized pipe and heat shields for durability SUPERIOR TECHNOLOGY — Optimal high technology washcoat formulated to deliver superior performance (as compared to EPA-compliant converters) Fits Select: 2007-2012 NISSAN ALTIMA 4 Cyl 2.5 L 2010-2013 NISSAN ROGUE 4 Cyl 2.5 L and more – add your vehicle to our fit widget to check