I've got the Probe Sportman Race Series pistons with special valve relief for my TFS TW heads. Very nice pistons. No problems here.
Hadn't heard about Probe being owned by TRW though...I think Probe Industries and Coast High Performance are like one in the same.
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1991 5.0 LX Coupe - 40,750 miles
331 cu. in. / Tremec 3550 / BFG Drag Radials
12.22 @ 114.31 mph - w/1.89 60'
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