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Performance increase was noticeable, they fit perfect, had them for a year now with no problems. Price is about $230 for the ceramic coating, which I think has a lifetime warranty.
Just be sure to use Percy's aluminum collector and header gaskets. They are pricey, but you won't ever blow out the gasket. Forget using the gaskets that come with any header, unless you like changing them.
Performance increase was noticeable, they fit perfect, had them for a year now with no problems. Price is about $230 for the ceramic coating, which I think has a lifetime warranty.
Just be sure to use Percy's aluminum collector and header gaskets. They are pricey, but you won't ever blow out the gasket. Forget using the gaskets that come with any header, unless you like changing them.
The header gaskets that come with the Dynomax Ceramic coated headers are fine, but you might want to buy Stage-8 locking header bolts. However, you definitely want aluminum or copper gaskets for the collectors. For some reason, Dynomax only supplies paper gaskets for the collectors, and mine lasted less than 50 miles. I've had the header gaskets on for over a year and had no problems yet.