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C.A.R.B. Compliant; Manifold Converter

Walker CalCat Catalytic Converters comply with specific pre-OBDII and OBDII requirements in the state of California. They feature the RIGHT loading of precious metals, the proper catalyst material and design, and a high-technology washcoat, providing enhanced oxygen storage capacity.

Walker Direct-Fit Converters
Designed for easy installation and OE-style fit.
  1. Thicker, OE-quality flanges.
  2. Body and pipe heat shields to match OE.
  3. Stainless steel body.
  4. Oxygen sensor fittings (where applicable).


Image is of a typical part(s); part appearance varies by application.

Which converter is legal for my state?
Body Length6.000"
Inlet Count1
Inlet Diameter 11.500"
Inlet Diameter 21.500"
Inlet Diameter DesignationOutside Diameter
Inlet Connection Type5 Bolt Welded Flange
Outlet Count1
Outlet Diameter 12.450"
Outlet Diameter DesignationOutside Diameter
Outlet Connection Type2 Bolt welded flange
Body MaterialStainless Steel
Body Shape4" Round
Body Width4.000"
Body Height4.000"
Substrate MaterialCeramic
Overall Length19.000"
Oxygen sensor locationPre Catalyst

Closeout Inventory Warranty Information:
Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).

Regular Inventory Warranty Information:
25,000-mile Catalytic Performance, 5-year/50,000-mile Structural Integrity
Warranty Details