Honda CR80 CR85 86-07 Phathead Racing cylinder head kit Color:Gold 6cc (100+ octane)K53 - 38

6cc  (100+ octane)K53 - 38

High compression (100+ octane)

Suzuki RM85 Phathead cylinder head kit 1991-2021+

Y33 -  (105+ octane)

WR250 YFB250 Timberwolf 2x4 YFM350ER Moto-4 YFM350FW Big Bear 4x4 YFM350X Warrior YFM400F Kodiak 4x4 YFS200 Blaster YFZ350 Banshee 1992

Honda CR80 CR85 86-07 Phathead Racing cylinder head kit Color:Gold 6cc (100+ octane)K53 - 38Honda CR85 86 07 Phathead Racing cylinder head kit Chamber selection: H01 8. 2cc Stock H02 7. 6cc 95+ octane H03 7. 1cc 100+ octane H04 6. 4cc 105+ octane Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head nuts, copper washers, some stickers for your bike and tool box and installation instructions.. Phathead cylinder heads are made of 6061 T6 billet aluminum. The material is stronger and transfers heat