Cal Custom Small Block Chev Fat Fenderwell Headers Black Mild Steel A/C Bolt pattern diameter is 1-3/4”

Bolt pattern diameter is 1-3/4”

25” (31mm) holes

Fits factory size hose 1

high-spark 65

Lower half of the hole separates via two bolts to allow easy installation of column

Cal Custom Small Block Chev Fat Fenderwell Headers Black Mild Steel A/C Bolt pattern diameter is 1-3/4”Fits Small Block Chevy 265, 283, 305, 307, 327, 350, 400 engines Fits regular (OE style) cylinder heads; do not fit slant plug heads Laser cut flanges The header set includes 2 exhaust manifold gaskets, 2 collector gaskets, 1 bolt kit NOTE: Minor modifications may be required for fitment on certain models Professional installation recommended! No instructions included! If your vehicle is using aftermarket components, parts from other applications or