Smithcraft Posted March 18, 2017 Share Posted March 18, 2017 I'm sure we all love the NGK plugs, but I was wondering if anyone's tried the Denso Iridium TT plugs? http://densott.com/#iridium-tt DEN 4704 or IKH20TT SC 1994 Legacy MI 2008 Legacy GT specB 2023 Crosstrek Limited Link to comment Share on other sites More sharing options...
Max Capacity Posted March 18, 2017 Share Posted March 18, 2017 IMO, don't be the test dummy. We use what we use for a reason. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
fahr_side Posted March 18, 2017 Share Posted March 18, 2017 Utter shit. Insulators crack easily and fall into the cylinder. I've seen several motors ruined from using these. Stick to NGK, stock heat range until you're over 400whp. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
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