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I heard they were expensive, but $200-$300 is crazy.
Those rings are supposed to be cooling rings like on a cylinder sleeve, and intended to be functional allowing for a cooler burn.
I'll stick with the pipe I have.
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1977 911S Targa 2.7L (CIS) Silver/Black
2012 Infiniti G37X Coupe (AWD) 3.7L Black on Black
1989 modified Scat II HP Hovercraft
George, Architect
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