street force headers competition headers truckforce headers footnotes 1 ... this system uses 21/4 o.d tubing we recommend using either ... the super competition aero chamber maximum flow or turbo mufflers in a 21/ ... 4 offset inlet/center outlet configuration see page 62 for complete muffler ... the part number when ordering 3 factory4 wheel drive 4 exhaust systems can also ... be fabricated using either hooker super competition aero chamber mufflers maximum flow ... mufflers super competition turbo mufflers competition turbo ... on vehicles originally equipped with catalyticconverters for racing purposes only 6 ... comes with h-pipe/balance tube assembly for ... on manual transmission equipped cars requires a hooker clutch linkage pivot ...