These are Isky Red Zone MAX lifters for BBC with the factory .842" bore size. These are rated by ISKY as being good for any valve spring pressure up to 1,300 lbs. I bought these new a year ago, and never used them, and as of late, I've decided to have the lifter bores in my block opened up to a larger bore size while it's at the machine shop. I'm knocking a whole lot off the price these cost me in order to sell them quick. The price includes shipping to any of the 48 states of the USA. I ship UPS and I'll except Paypal, Venmo, or Zelle. Please be aware that these Isky Red zone lifters are .300" taller so they will require shorter pushrods. These have never been used nor installed in any engine. You can text me 203-906-3212 I also have just listed these on the Chevelle board where I have a whole lot more posts on than I do here. ISKY solid roller EZ Roll "No Needle bearing" lifters for BBC (NEW): | Team Chevelle (chevelles.com)

I can open the box and provide pictures of the lifters themselves upon request if someone is interested.