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AOS should not require a tune - should it? but if your car doesn't require a tune otherwise that I'm not sure an AOS is of much benefit unless you are tracking it. The more you push the car, and the more power it makes, the more you need one, YMMV.

I can attest that the IAG Comp works really well. I can also attest that I would not install one one a stock DD. It's just too invasive. I am happy to have one in my car though. For cold weather I'd forgo most of the others altogether, though the KB might be a good option for warm climates and track use.
 

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For cold weather I'd forgo most of the others altogether, though the KB might be a good option for warm climates and track use.
We have a cold climate kit. Same parts you find on a piston engine aviation crankcase system made for cold climate operation.

Our product performs as you'd expect from any of our products.

We do get very positive feedback on the installation. Without coolant lines the install takes half the time. So if you're having a shop install, the labor cost is considerably lower making the overall price more comparable to the mainstream products out there.

Another advantage we have is that the top can be opened in less than a minute to inspect the inside. This can be done at oil changes. It allows for a quick and easy wipe down of the internal surfaces and very easy method for checking and verifying proper function (clogged or kinked lines).
 

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Which ones can be used that do not affect a new car warranty?
This is really going to be dealer dependent. Some dealers are enthusiast friendly and have the knowledge to know an AOS is not going to cause a rod bearing failure :lol: dealers that are likely to deny a-n-y-t-h-i-n-g because it is not OEM original are likely not going to warranty you anyway for not having ever oil change documented at their dealership. If they want to be difficult that is their choice. Legally, Magnuson-Moss act states that any dealer bares the burden of proof that an installed parts caused the failure. I would be hard pressed to think that any AOS out there that actually has engineering time into it could cause such a thing. Even a lot of the crappy ones shouldn't cause your engine to blow up.
 
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