Compared to the bolts on my GM Crate 350, this is GREAT! I took the valve covers off to replace them with Gel-Pro 1628 gaskets and I put these bad boys in! They screw right into the block very easily! Used my Allen key to secure them all neatly. I put on the valve covers, put on spacers, then washers and self-locking nuts. These nuts feel very tight and should not accidentally loosen while riding! I recommend them to EVERYONE with a 350 engine in their car! This is an amazing product and it comes at a killer price! Good job Morozo! you continue to be amazed! Keep it up!
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