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I purchased the full headers, y-pipe and 3 inch back exhaust from JP. The headers are stainless steel while the rest of the system is aluminum. The entire system comes coated to protect and to help keep heat inside the pipes and exiting the tail pipe for optimum performance. Well after only a few months the entire exhaust except the headers was rusting significantly. After a call to Eric and a little deliberation he agreed to make me a new system from the headers back. He admitted this didn't make any sense. Even though this car sees a fair amount of salt, does this make any sense? I was wondering if the two different types of metal could cause some kind of electrolysis? I have heard something like this b4 and my shop foreman said the same thing to me. He said on some of the Jap cars he has seen metal braided grounding straps to ensure against this conflict of metals. Or is this a case of just some bad coating or low grade materials? The new product was installed today. I love this exhaust and want to stay looking good. Any thoughts???? Thanks all~
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125 front wheel horsepower with major retard issues between 4500-5200RPM -
OD switched off, even when not in 3rd results in major power loss/rpm drop.
Its alumanized mild steel and yes it rusts but take a bit more time then standard mild steel. Aluminum rusts but that aluminum oxide protects the rest of the aluminum from rusting deeper into the material.
The exhaust material is not aluminum.. It's aluminized steel. They rust like regular steel but a bit slower. Nobody uses aluminum tubing for exhaust work.
Although the pipes were ceramic coated, the coating do chip if you scratched it during install. Road debris and rock chips will chip the coating as well. Once the bare metal is exposed to salts and weathering, it will start to rust.
Do you drive on gravel roads all the time? I rarely see exhaust rust that quick even when it is uncoated. Usually the ceramic coated exhausts hold up extremely well even through Canadian winters.
__________________ * Goal for 2012 -- 200+ MPH in the Camry
Last edited by Tony the Tiger; 03-08-2005 at 04:05 PM.
The exhaust material is not aluminum.. It's aluminized steel. They rust like regular steel but a bit slower. Nobody uses aluminum tubing for exhaust work.
Although the pipes were ceramic coated, the coating do chip if you scratched it during install. Road debris and rock chips will chip the coating as well. Once the bare metal is exposed to salts and weathering, it will start to rust.
Do you drive on gravel roads all the time? I rarely see exhaust rust that quick even when it is uncoated. Usually the ceramic coated exhausts hold up extremely well even through Canadian winters.
Thanks for the feedback folks. I dont do really any gravel road travel. The exhaust was actually flaking off in some spots. This exhaust was 2g's, I would expect it to hold up for a few years without rusting dramatically. I would say in 4 months that 30% of the y, mid & rear were rusting. As though it was just regular steel and was not coated thoroughly enough. I am going to have to do a little more digging as to the material used and the expectation to longevity based on my climate exposure. Tony I think you have the JP exhaust, at least the headers look like it, and I believe you drive your gen3 in the winter- how does yours look and how long have you had it? And what about the conflict of metals....my shop foreman said the system might need some grounding straps, anyone ever heard of this????????
That is very strange. It should definitely not be rusting that fast, you may have just gotten a faulty coating? How much did you scratch it during the install? That might give some clues.
That is very strange. It should definitely not be rusting that fast, you may have just gotten a faulty coating? How much did you scratch it during the install? That might give some clues.
-Scott
Not much- my shop foreman is pretty careful about installs- at least I hope he was. I wasn't there for the first entire exhaust install. I was there for the recent install of the new y, mid and rear pieces. I am going to inspect more often now and look for clues. We had another crazy strorm last night and there is more sand and salt on the road. I am going to wipe it down next time I am under the car and see if it is getting sand blasted just from the fact this big exhaust is so close to the ground also since the car is 1.2 inches closer to the ground as well.....
still no comments on the two different metals causing some kind electrolysis??? Anyone????
I am pretty sure that the ceramic coating wasn't done properly.... Flaking mostly comes from bad surface prepping or contaminants getting on the surface during coating. A couple of heat cycles on badly prepped ceramic coating will flake them right off.
The headers I have from JP were actually wrapped with exhaust wrap.. So far, I do not have any problems with the headers and the coating. Plus, I don't get much salt and water splashing up to the engine bay anyways; well at least not anywhere near as much weather as a cat-back exhaust system
__________________ * Goal for 2012 -- 200+ MPH in the Camry
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