Diesel Doctor

[noleafofclover]

Hello All,

My first time here, and I was wondering if anyone knows anything about exhaust systems for 6.5td.
I currently have stock down pipe into 3 inch piping with Magnaflow strait trough muffler. But the problem is the pipes are not mandrel bent, but pressure bent. My question is: is it worth upgrading to 4" exhaust system from Warpspeed, or its waste of money. I don't know if its going to benefit my truck, I mean its not as powerful as other hight torque and horsepower engines. I was talking to a guy, and he said that 4" is too big for my truck, and it will hurt more than help, the flow I mean. I' m sorry just money is tight this days, as we all know, and if its not beneficial to swap than I wont do it. So please if you have any experience in this give me some feedback. Thank you very much.

[JohnC]

There is no such thing as "too big" in the Diesel world. There is, however, a law of diminishing returns. With a stock '93 that comes around 4 inches. However, the stock downpipe is usually badly banged up. A mandrel bent replacement is a good place to start. 3" press bent piping is less than optimal.