Hey, let me know what you guys think. I am thinking about going with this setup. 2.5 inlet / 2.5 outlet 40 series flowmaster single pipe. However, got a chance to get a 4 inch tail pipe cheap and I want to add a reducer in for 2.5 to 4 inches. My guess is that I should not loose my back pressure with the 2.5 in 2.5 out muffler. What say you?

 

If you dont mind losing a small amount of back preasure go for it. I got rid of my tail pipes and went with turndowns right off the back of my 40 series and noticed a slight low end loss. Sounds loud as hell though!! I love the 40 series!

 

I was hoping not to loose too much back pressure but I do want the loudness. I figured the 4 inch tail pipe would add to that anyways. I currently have a 40 series but it is a delta flow and they are not as loud as the originals. I will put me an original on my ram and put the delta on my ranger. I already have the reducer, just waiting on the pipe.

 

3" inlet and outlet on my flowmaster muffler, LOVE it

 

won't lose to much diff, buddys got almost the same on his no 4' though sounds awsome i think you'll like the noise and not even notice a slight loss

 

For good low end go single 3" out or dual 2.25" outs.

 

I agree. I would suggest scrapping the 4" pipe idea and go with a single in dual 2 1/4" out Flowmaster 40 with 3 1/2" chrome tips. Thats what I have and it sounds awesome. A single in - out will not be very loud.....
Dan the Fastman says to go with the dual 2.25's or a single 3" for best low end also.

 

I think the 4" he was talking about was the tip.

I agree with the posts above. The BEST setups for exhuast for our trucks is either a single 3" or dual 2.25".