# MagnaFlow 23405 Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) for 1997-2005 Buick Regal and More ### Performance Overview Magnaflow specializes in performance catalytic converter. They've spent over thirty years creating, developing, and improving on their technology to earn their reputation as being the global market leader. magnaflow's Heavy Metal catalytic converters use a combination of ceramic and metallic substrates as well as wall thickness specifically developed for your specific vehicle needs. ### Key Features - Brand: MagnaFlow - Part number: 23405 - Product type: Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) - Designed for compatible vehicle applications listed on this page ### Vehicle Fitment - 1997 Buick Regal, Note: Gs, Ls; 3.8L; 2.50"; 2.50" - 1998 Buick Regal, Note: 25Th Anniversary Edition, Gs, Ls; 3.8L; 2.50"; 2.50" - 1999 Buick Regal, Note: Gs, Ls; 3.8L; 2.50"; 2.50" - 2000 Buick Regal, Note: Gs, Gse, Ls, Lse; 3.8L; 2.50"; 2.50" - 2001 Buick Regal, Note: Gs, Ls; 3.8L; 2.50"; 2.50" - 2002 Buick Regal, Note: Gs, Ls; 3.8L; 2.50"; 2.50" - 2003 Buick Regal, Note: Gs, Ls; 3.8L; 2.50"; 2.50" - 2004 Buick Regal, Note: Gs, Ls; 3.8L; 2.50"; 2.50" ### FAQ **Will this fit my vehicle?** Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase. **What part number is this?** The listed part number is 23405. **Is this product designed for direct replacement?** Yes. This product is intended to match compatible vehicle applications listed in the fitment section. **Should I confirm fitment before ordering?** Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering. ### Common Searches - Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) for Buick Regal - 23405 fitment - MagnaFlow Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) - 1997 Buick Regal Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) ### Vehicle Fitment Table Year Make Model Position Fitment Precision Note 1997 Buick Regal Gs, Ls; 3.8L; 2.50"; 2.50" 1998 Buick Regal 25Th Anniversary Edition, Gs, Ls; 3.8L; 2.50"; 2.50" 1999 Buick Regal Gs, Ls; 3.8L; 2.50"; 2.50" 2000 Buick Regal Gs, Gse, Ls, Lse; 3.8L; 2.50"; 2.50" 2001 Buick Regal Gs, Ls; 3.8L; 2.50"; 2.50" 2002 Buick Regal Gs, Ls; 3.8L; 2.50"; 2.50" 2003 Buick Regal Gs, Ls; 3.8L; 2.50"; 2.50" 2004 Buick Regal Gs, Ls; 3.8L; 2.50"; 2.50" 2000 Chevrolet Impala Base, Ls; 3.8L; 2.50"; 2.50" 2001 Chevrolet Impala Base, Ls; 3.8L; 2.50"; 2.50" 2002 Chevrolet Impala Base, Ls; 3.8L; 2.50"; 2.50" 2003 Chevrolet Impala Base, Ls, Ls Sport; 3.8L; 2.50"; 2.50" 2004 Chevrolet Impala Base, Ls, Ss; 3.8L; 2.50"; 2.50" 2005 Chevrolet Impala Base, Ls, Ss; 3.8L; 2.50"; 2.50" 2000 Chevrolet Monte Carlo Ss; 3.8L; 2.50"; 2.50" 2001 Chevrolet Monte Carlo Ss; 3.8L; 2.50"; 2.50" 2002 Chevrolet Monte Carlo Ss 35Th Anniversary Edition, Ss Dale Earnhardt Signature Edition, Ss; 3.8L; 2.50"; 2.50" 2003 Chevrolet Monte Carlo Ss High Sport, Ss Pace Car, Ss; 3.8L; 2.50"; 2.50" 2004 Chevrolet Monte Carlo Ss; 3.8L; 2.50"; 2.50" 2005 Chevrolet Monte Carlo Lt, Ss; 3.8L; 2.50"; 2.50" 1998 Oldsmobile Intrigue Base, Gl, Gls; 3.8L; 2.50"; 2.50" 1999 Oldsmobile Intrigue Gl, Gx; 3.8L; 2.50"; 2.50" 1997 Pontiac Grand Prix Gt, Gtp, Se; 3.8L; 2.50"; 2.50" 1998 Pontiac Grand Prix Gt, Gtp, Se; 3.8L; 2.50"; 2.50" 1999 Pontiac Grand Prix Gt, Gtp, Se; 3.8L; 2.50"; 2.50" 2000 Pontiac Grand Prix Gt, Gtp, Se; 3.8L; 2.50"; 2.50" 2001 Pontiac Grand Prix Gt, Gtp, Se; 3.8L; 2.50"; 2.50" 2002 Pontiac Grand Prix Gt, Gtp, Se; 3.8L; 2.50"; 2.50" 2003 Pontiac Grand Prix Gt, Gtp; 3.8L; 2.50"; 2.50" ## Details - **Price:** 509.69 CAD - **Vendor:** MagnaFlow - **Type:** Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) - **Tags:** 1997 Buick Regal, 1997 Pontiac Grand Prix, 1998 Buick Regal, 1998 Oldsmobile Intrigue, 1998 Pontiac Grand Prix, 1999 Buick Regal, 1999 Oldsmobile Intrigue, 1999 Pontiac Grand Prix, 2000 Buick Regal, 2000 Chevrolet Impala, 2000 Chevrolet Monte Carlo, 2000 Pontiac Grand Prix, 2001 Buick Regal, 2001 Chevrolet Impala, 2001 Chevrolet Monte Carlo, 2001 Pontiac Grand Prix, 2002 Buick Regal, 2002 Chevrolet Impala, 2002 Chevrolet Monte Carlo, 2002 Pontiac Grand Prix, 2003 Buick Regal, 2003 Chevrolet Impala, 2003 Chevrolet Monte Carlo, 2003 Pontiac Grand Prix, 2004 Buick Regal, 2004 Chevrolet Impala, 2004 Chevrolet Monte Carlo, 2005 Chevrolet Impala, 2005 Chevrolet Monte Carlo, 23405, Auto Parts, Automotive, Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD), MagnaFlow, Magnaflow-23405, Muffler, Performance Exhaust, Performance Parts, Vehicle Fitment ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 509.69 CAD | In stock | ## Images - MagnaFlow 23405 Heavy Metal Direct Fit Catalytic Converter (2.5" ID/2.5" OD) --- > Source: [Standard Auto Part](www.standardautopart.com/products/magnaflow-buick-regal-catalytic-converter-23405) > Updated: 2026-06-13