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Duals Vs 4" single

Old Apr 26, 2004 | 11:15 PM
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hoserack's Avatar
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Default Duals Vs 4" single

I have looked at some options for my new 422 stroker and I'm leaning towards a single 4" with a nice collector Vs. trues duals through and X pipe.
Plus I'd like to have an over the axle set up with my Corsa tips welded on.
Any thoughts on my delema?
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Old Apr 27, 2004 | 06:46 PM
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4" Mufflex. Use a different muffler than the ones offered.
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Old Apr 27, 2004 | 07:28 PM
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4" Single. Use a 4" single in/out Borla or Magnaflow or something that performs nice, then if you really want tips you can always use a Flowmaster 3"-4" Y-pipe to make a 2otl style exit with 2 3" pipes.
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Old Apr 28, 2004 | 04:12 AM
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Originally Posted by SouthFL.02.SS
4" Mufflex. Use a different muffler than the ones offered.
He's really on to something.

My 380ci made the same HP through my single 4" Mufflex with a Magnaflow as it made through dual 3" cutouts, and 20+ more rwtq through the first half of the dyno sheet. The Magnaflow picked up about 10 peak hp over the flowmaster and was 7db quieter.
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Old Apr 28, 2004 | 05:11 AM
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I would go with the 4" system
I ran duals for a while and got tired of the aweful interior noise, fitment, etc
or you can save some money and use a 3" ypipe, 3-4" flowmaster Y-collector, 4" cutout and taper down to a typical 3" system or factory catback
that way its quiet around town, and makes 4" power with the cutout open
Im going this route, except with a 3.5" cutout and stock SS muffler
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