I am wanting to run true duals on my 2001 4.7 v8. What would be the best way to do this considering the cats and 02 sensors.

 

I had my stock y pipe cut right after the cats and the had my pipes welded in there place although I have side pipes I didn't have too many problems with routing them if you're going for the normal true duals you would have to route around the gas tank and the spare if you still have it under you're dak . Going to get some pics of my new exauhst this weekend. So I can post them ill make sure I get some shots from underneath so you can see how it was done .

 

I had my pipes cut right at the Manifold, put in true dual 2 1/4" exhaust. Dual in/Dual out cat, Dual in/Dual out Dynomax Muffler with built in X-Pipe, I want to add some headers, and a Hooker Aerochamber muffler, and do a Cat delete, and put in an H-Pipe instead of the dynomax.

 

metalsrfr
Did u have any problems with ur o2 sensors after doing so? My spare isnt under my truck but plan on putting it back. I figured that cutting the y pipe would be the best route and least expensive other than SI/DO muffler. What mufflers do you think would sound the best? I was thinking flowmasters but IDK.

 

I didn't have any problems with my o2 sensors . And I had a flowmaster 40 onmy 5.9 and didn't like the tone it sounded to much like a mustang everyone else on here suggested magnaflows , or dynomax s

 

cant go wrong with dual 14in glass packs. cheap and they sound really throaty

 

How much would a set of magnaflows or dynamaxs be?

 

For my set up I couldn't go with the 14in mine are 60in glass packs being I wanted the side pipes and they have to pass state inspection they have to exit past the cab . I don't know how much those would cost but I would check them out on www.summitracing.com

 

When you ran your true duals metal or winger, where did you put your 1st o2 sensor? I ask because if your only monitoring 1 side, what about the mixture for the other side thats not being monitoring.

 

Mines a 5.9 so I have 4 o2 sensors 2 on each bank so I cut the y pipe after the cats so it doesn't affect any of the o2 sensors ill get the pics posted sometime this week I don't have a pc so I'm doing everything from my phone just got to get them to post to photobucket .