Mar 10, 2013 #1 K KevinB Well-Known Member Joined Dec 2, 2004 Messages 6,438 Anyone tell what these are? I know they are 30 over but does that number look familiar? 521acp 28207-15-b Attachments ForumRunner_20130310_180239.png 360.8 KB · Views: 95
Anyone tell what these are? I know they are 30 over but does that number look familiar? 521acp 28207-15-b
Mar 10, 2013 #2 K KevinB Well-Known Member Joined Dec 2, 2004 Messages 6,438 Looks like a speed pro hyoertechtic or however you spell it
Mar 10, 2013 #3 chopped39 Well-Known Member Joined Aug 30, 2004 Messages 4,260 I have seen the acp before. I think that is a Sealed power piston
Mar 10, 2013 #4 B baby6 One Fast Buick Joined Feb 22, 2009 Messages 423 Speedpro, type the 521acp in google and summit will pop up.
Mar 11, 2013 #5 P Paul Lohr Member Joined Jun 11, 2010 Messages 264 http://www.fme-cat.com/PartDetailWindow.aspx?brand=SD&pt=Cast Piston&PartNumber=H521ACP#.UT2K_tZaJ8o http://www.summitracing.com/parts/slp-h521acp How did these pistons hold up for you? I assume they weren't in one of your 9-second cars? Paul Lohr
http://www.fme-cat.com/PartDetailWindow.aspx?brand=SD&pt=Cast Piston&PartNumber=H521ACP#.UT2K_tZaJ8o http://www.summitracing.com/parts/slp-h521acp How did these pistons hold up for you? I assume they weren't in one of your 9-second cars? Paul Lohr