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This is a bolt-on replacement catalytic converter for vehicles with the 5.7L V8, sold under MagnaFlow's HM Grade line and certified for federal/EPA use (not California). It uses mandrel-bent stainless tubing and a compact, low-mass body, and MagnaFlow 3D-scans the original part so it installs with hand tools and no cutting or welding. That makes it a practical fix for a failed or clogged factory converter on older trucks and SUVs. Against universal-fit converters, the direct-fit shape and included hardware save installation time; against OE parts, it is a simpler aftermarket option, though it is not legal for California emissions and buyers should confirm their engine and emissions tier fit.
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Lowest price we've seen: $443.99 on Nov 9 at Advance Auto Parts. Tracked across 1 store since Nov 9.
Owners of 5.7L V8 trucks and SUVs generally report that this converter bolts up like the factory part and clears the check engine light. Complaints center on fitment confusion and on the federal-only emissions status.
The MagnaFlow HM Grade Direct-Fit Catalytic Converter (part 23409) is a federal/EPA compliant converter designed to fit the 1992-1996 Chevrolet Corvette with the 5.7L engine. It is a direct-fit part, so installation requires no cutting or welding when done with the proper tools.
The body is stainless steel, with 16 gauge 409 stainless steel tubing, 308 stainless steel MIG welds, 410 stainless steel hangers and a ceramic substrate. The tubing is mandrel-bent for free flow, and a single laser fusion weld reduces the possibility of a leak.
The part was 3D scanned during development so it fits and functions like the original equipment. Its compact, low-mass design allows for greater thermal efficiency.
