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I have a tdo4-18/6cm2.It has a 38x50mm oval opening on the turbine housing.The viggen manifold has a 30mm round opening so I went with a tube header from Nick at Genuine Saab.The header has a 50x40mm opening which makes for a nice match and is a quality piece.My EGT dropped a little over 200F. I also have a complete 3in exhaust.With this setup there is virtually no turbo lag as some guys at Carolina Motorsport Park in the Porsches will testify to.-ed99viggen
posted by 68.47.190...
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