Aluminised steel
2-1/4 inch inside diameter
X-merge pipe
Aluminised steel is better at reflecting heat in comparison to regular mild steel. The aluminised coating also helps to prevent corrosion. When welding ensure that the coating around the weld area is adequately stripped back to the bare steel to ensure proper penetration.
Sold individually

Note: Other sizes are available; also Y merge pipes. Individual mandrel bends and straight lengths are available. Full DIY dual exhaust kits are also available

Aluminised Steel 2.25 Inch I.D. X Merge Exhaust Pipe