GRANT CAST PISTON RING SET TO SUIT HOLDEN KINGSWOOD HT HG HQ HJ HX HZ WB 253 4.2L V8For over 96 years, Grant piston rings have been one of the prime manufacturers of piston ring sets and produce the highest quality rings for unmatched engine performance. The continuous improvements in manufacturing process and product design allow for the brand's growth within the automotive industry. To achieve this, extensive research is done on the latest advancements in technology from casting to machining to coatings. Every Grant piston ring