4-2-1 system

Engine and fuel systems#4-2-1#system

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A type of exhaust system with a 4-2-1 configuration

Related mailing-list messages and current discussions from Gerry. These are community context for the dictionary term.

Exhaust Design
Historical mailing list · Sat, 13 Feb 2010 19:36:34 -0800
...Did the folks making SS exhaust systems in a 4-2-1 or 4-1 design improve on what VW designed? I have a...
Re: Exhaust Design
Historical mailing list · Sun, 14 Feb 2010 07:06:13 -0500
...Did the folks making SS > exhaust > systems in a 4-2-1 or 4-1 design improve on what VW designed? > > > > I have a...
Re: Vanagon exhaust diameter? + Custom exhaust fabrication questions.
Historical mailing list · Fri, 28 Mar 2008 00:28:22 -0400
...are you referring to primaries from the exhaust flange to the collector there? Or it the jetta system a 4-2-1 style exhaust...