[V8] What size is the exhaust pipe after the cats (4.2)

[D Morralee]

I'm going to be putting in two E-Cutout Kits on my 4.2 exhaust system and I'm wondering what size (dia) of product should I be getting. 

 

Here is the list below.  I'd like to get the closes size 

 

4.0"
3.5"
3"
2.5"
2.0"


http://www.dmhperformance.com/ecutout.htm

 

cheers superdave 
 		 	   		  
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