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Any time is a good time to switch to bellowed pipes. Even if they are in good shape, you will be eliminating an inevitable leak. It's not a matter of if they will leak, it's usually a matter of when.
I bought this truck from a friend of mine with the intentions of going through it this winter. Due to an unexpected engine pull on Smokie, my flatbed, I was forced to register this thing today, and actually drove it for the first time. I heard the leak, and peeked through the wheel well to see a hole in the cylinder head, just above the exhaust port. Looks like a chunk broke/rusted off the head, and then a hole from an exhaust leak developed. So at this point, I'm not sure if I need to do up pipes or not. As soon as I get Smokie up and running again, I'll be pulling the engine in 'Pops' and dealing with it. I'm wondering though, what's the benefit of bellowed up pipes? I'm not asking rhetorically, I'm 100% curious. Is it durability, less likely to leak, or more HP?
Not sure if you are in a RUST area or not but I have seen more than one plow truck ROT a hole in the head(Heat and salt make for a bad combo)
I was looking at them before I went with the Irate.
IIRC ReBuild does the welding for them.
Another place to look is Rosewood Diesel. He modifies Stock pies to do away with the donuts and adds bellows. I think he said about 1/2 the cost of the Bar None ones
Thanks guys! I wi be looking into those options in a few weeks. I have the engine out of Smokie, my 01 7.3, as of yesterday, so my 95 is on the back burner for now. I will get done pics if that hole in the head when I get a chance.