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Discussion Starter #1
I need feedback on which cat-back system will give me the most horsepower and my main concern, more miles per gallon increase. Thanks for your input.
 

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If it's performance gains you are looking for, don't waste your money. You won't get much with any of them. You should consider Gibson also. IMO, the Gibson has a different sound than the others (no rice) but that's your call.
 

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I just finished installing the Borla cat back on my 01 SC with URD fuel mods 3.4 4x4 and I love the sound. I went from a flowmaster 40 series with all stock piping to the Borla setup. The flowmaster was a little loud for my taste. The borla still lets you know its there but not nearly as loud in the cab, but when you stomp on it on the highway it really sounds good. I can't really comment on the fuel economy yet but I can say that it does feel like I may have a little more power now feels like the truck can exhale a little better now. BTW..the best price I found for the Borla system is through JC Whitney for $429.99 but be prepared to wait at least a couple weeks to receive it..possibly a month. And when I received it, the first section of pipe that bolts to the cat converter would not mate up...Borla didn't weld the flange to the pipe evenly but a dremel with grinding attachment fixed that problem, I just smoothed out the inside of borla's pipe to make it a smooth fit over the piece of pipe that sticks out from the cat converter.
 

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If Borla makes an application for your truck, I'd get Borla over the TRD. In fact, the TRD exhaust uses a Borla muffler, not sure whether the rest of the system is made by Borla or TRD. Also, the Borla system is a side exit like stock and the TRD exits the rear which IMO doesn't look good on a prerunner or 4x4. Unfortunately, Borla does not make a cat-back system for a DCab which is what I have. As bb609 mentioned, look into Gibson exhausts too. Luckily someone makes a DCab cat-back system which is Gibson. They're cheaper than the Borla and TRD systems and offer them in two styles, aluminized piping or stainless steel. I'd opt for stainless steel if you plan on keeping the truck for a long time. The aluminized systems go for under $300.
 

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Do not know what trd exhaust you have seen before but my trd exhaust exits the same location as stock and does not take up any more space than stock except for the larger diameter tailpipe.

Sam
 

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Discussion Starter #6
I am mostly looking for more miles to the gallon gain. I only get 15 mpg now.
 

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i get an extra 40 miles per tank when i swapped in a magnaflow 14" muffler
 

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An extra 40 miles per tank just from a muffler swap??

40 miles X 2.5 gal @ $2.00 / gal = $5.00

$5.00 X 1 tank per week = $260 savings in one year

This is certainly worth considering!!
 

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I have a Magnaflow 24"(body) muffler on my truck and I love it. I just had it welded in to the stock pipe. It was cheap and it sounds great.

The smaller body muffler you get, the louder it will be. I highly recommend the 24' Magnaflow.
 

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I just had a 20" Dynamax installed today. I have headers and a s/c. The sound is just right. Not too loud, but louder than stock. For a V6, I'd definitely stick with a longer muffler. Before the install, I was going to have them add a resonator. Didn't need it afterall.
 
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