Qlty: Composite material, fiber-steel-fiber+silicone bead Head Bolts not include; Head bolt replacement recommended. HBS Ref.:81006500 Highly recommended replace the Hydraulic Lifters. AJUSA Ref.:85001500 Meets or exceeds OEM standard quality and performance requirements. Designed to OE specifications. CHG Qlty:Composite material, fiber-steel-fiber+silicone bead Head Bolts not include; Head bolt replacement recommended. HBS Ref.: 81006500 KType_Nr:10169|10961|10962|11281|11284|11286|11880|14437|2415|30488|34185|34186|34381|34382|5611|7910|8530|874|891|895|896|9094|913|914|915|916|923|938
AmazonQlty: Composite material, fiber-steel-fiber+silicone bead Head Bolts not include; Head bolt replacement recommended. HBS Ref.:81006500 Highly recommended replace the Hydraulic Lifters. AJUSA Ref.:85001500 Meets or exceeds OEM standard quality and performance requirements. Designed to OE specifications.