Boy is this thread getting convoluted fast. OP asked about the gapless tops in an effort to reduce oil consumption. So they reduce blowby--BFD. I've seen engines with a lot of blowby make very good power--I've also seen the same engine freshened up to near zero blowby with conventional rings--Near ZERO power change. Again if using a leakdown test number as a badge of honour or a few more cranking PSI is your thing--have at it. My recommendation is to NOT use them. I don't care who uses them--I won't. J.Rob


2009 PHR\EMC Competitor
2010 PHR\EMC Competitor
2011 PHR\EMC Competitor
2012 PHR\EMC Competitor
2013 PHR\EMC Competitor
2014 HotRod/EMC Competitor
2015 HotRod/EMC NoShow
2016 HotRod/EMC 3rd place SPEC Bigblock
2018 HotRod/EMC 7th place G3