Anybody have any tech. info on cat back 3 in. exhaust single out w/ flowmaster muffler. I have 03 supercrew 4x2, 3.5"fabtech lift,285/75/16 tires,3.55 Gears ,5.4 engine and a K&N air filter.Will the 3 in. rob me of Hp,gain Hp,how about torque? I tow a 26ft 5100 lb TT. Don't have problem towing, but will the 3 in. exhaust help?
Thanx for the help K

 

i tow approximately the same weight everyweekend- i went with magnaflow #15609 on the claims it DID NOT lose torque!- I Can say i did gain some power at all rpms and may even have gained a few lb ft of torque- got it from www.fulllineexhaust.com for $304 shipped- lifetime warranty -stainless steel- phil

 

I would just stick with 2.5" that is plenty for a stock motor. I run single chamber flowmasters with no cats and its extremely loud.

 

I picked this up from flowmasters web site I thought I remembered something about Pipe dia when I was doing mine I have 2.5 with a 50 series Flowmaster. Noticable low end performance upgrade nothing at high end

Tailpipes aid in keeping atmospheric pressure from rushing back into the muffler. Tailpipes can improve performance and control sound. In addition, tailpipe length can affect the power as well as sound. Tailpipes shold be a minimum or 10", and not longer than 6' Tailpipe length of more than 6' may need a resonator.

The size of pipe used in an exhaust systemis a critical item to consider. Pipe diameter will affect the sound level and performance characteristics of the muffler, but keep in mind that bigger is not always better. Too large of a pipe can actually hinder exhaust scavenging by allowing atmospheric pressure up the pipe. As a rule, most general street applications use 2.00" through 2.50" pipe, while modified street applications will generally use 2.50" or 3.00" pipe.

 

This is why I went with a 3" inlet with dual 2 1/2" outlets and dual pipes out the rear. It seems to breath a bit better ( the 4 converters are the biggest restriction). They just made a 2 1/2" to 3" adapter for the front of the muffler. There is no restriction after the converters.
The added tailpipe is still lighter that the 35 gallon muffler that I removed. It was as big as the gas tank.
Jimmy

 

Hey thanks for all the in-put, I have talked to a good muffler shop also and the owner said if you don't like it after about a week or so, then come back and we'll put your stock back in.But he said you will be coming back, just to say "hi". So trial and error, I have an appt. set for today. I'll let you all know how it goes. Again thanks everybodoy for your input K.

 

I installed the Banks Power Pack System on my 03 SuperCrew 4x4. It includes tube headers and 3.5" Exhaust single outlet, and a cold air intake. This system installed runs in the neighborhood of $1800.
What a differance in torque. Well worth the money spent, not too loud, nice sound and way more power throughout the power band.

 

Hey everybody had the exhaust completed today and I love it. Will be towing my TT this weekend and I'm sure it's going to make a difference, Ive got a-lot better response on the peddle and a-lot more pull in the high end, where I need it the most. Thanks everybody who replied to my thread. Rich

 

what did ya go with?

 

I went with flowmaster 40 series 3" cat back. Had a choice between manaflow but I liked the sound of the flowmaster. Magnaflow ,you get the same result but not as aggressive sounding both are very good products.I will go to the magnaflow next time, when I am ready for another change$$$$.

 

karenj Did you notice any increase or decrease in your fuel milage?

 

Have'nt had the system long enough to ck. But the old saying if you can keep your foot out of it and drive normal it won't be bad.Right now I get aprox. 19 MPG HWY with my size tires.