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Old 01-11-2012, 10:34 PM
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Originally Posted by usaweapon777
Also when looking for silverado's with the vortech car craft says to avoid the cast # 10239906. It has hardened exhaust seats that limit flow supposedly. If anyone can validate this info that would be great.
This Info has been debunked. Some of these have a small lip where the Seats were installed, if so it's easily removed. Hardened Seats are a ++ to me.
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