prs Posted July 9, 2002 Share Posted July 9, 2002 I'm about to change the standard exhaust manifold and system on my 1.6SS and replace it with a 4 into 2 into 1 manifold with a repackable silencer. On the standard manifold the lambda is situated in the collector, however on the 4.2.1 manifold it's sited in the 4th primary, will this make any difference? Link to comment Share on other sites More sharing options...
Adrian Williams Posted July 10, 2002 Share Posted July 10, 2002 No. Recently changed from 4:1 with short primaries to 4:1 competition with long primaries and lambda in fourth header. No adjustment required. Link to comment Share on other sites More sharing options...
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