I have a used 521 stroker kit. Crank is a Scat cast 4.300 stroke 2.200 rod journal. Rods are Eagle H-Beam 6.605 length ARP 7/16 rod bolt. Pistons are SRP 4.390 bore. No rings or bearings. This rotating assembly has dyno time only and has NOT seen over 3500 RPM. We were building low RPM stroker motors for huge compressors and ended up using a larger bore and stroke combo.
I was going to use it in my street car but have change my combo. I was going to coat the pistons but have not yet.
$1,000.00 for kit
$200 extra to have the pistons coated. Teflon on the sides and ceramic on the top.