information 2 available with fittings to accommodate air injection manifold add ... only 6 comes with h-pipe/balance tube assembly for racing purposes only 8 ... and 16 formed adjustable header slip tubes plus 18 slip-on collector extensions ... is the same as stock but can be matched to your particular exhaust port ... transmissions except 1970 hornet 18 one tube each side over frame 19 hooker mufflers ... flow sidepipe muffler slip-in design to be used with 4 sidetubes 20 will not ... 23 this header was designed to be used with the original chevy ii v8 ... we recommend #2214 or 2243 24 one tube over frame left side 25 this is a tuned ... style header which will bolt directly to the 1986 and later factory exhaust ... equipped with the 440 engine 27 two tubes over frame on each side 28 hooker ...