Standard Duty HTC Coated Full-Length Headers1964-77 Chevy Passenger Car 396, 402, 454, 5021-3/4" Tube, 3" Collector For 396, 402, 454, and 502 engines (also 427 but only in Camaro)Without smog injection or injection headsModification to stock exhaust required to retain catalytic converterNot recommended for use with aluminum headsNot legal for sale or use in California on pollution-controlled vehiclesWill not fit Saginaw close ratio P/S with 825 power steering boxDue to cylinder heads (aluminum), Generation 6 BB-Chevy 502 will have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.Applications1964-73 Chevrolet Chevelle1964-77 Chevrolet Malibu & El Camino1965-70 Chevrolet.
These headers are great quality and the easiest set I have ever put in. They fit right in my 66 chevelle big block. Best looking and easiest install of headers I have ever had. I would caution anyone running the same set up as mine you WILL NEED SHORTY SPARK PLUGS. Standard length won't fit and you will be hating your self trying to get them in.
Over all I am very happy. I'm running a 66 chevelle big block with Merlin cast iron heads.