Radium Insulating Spacers & Washers (Injectors) 2013-nissan-armada-esi2422828 Valve guides are small cylindrical

Valve guides are small cylindrical bushings that press into a cylinder head

Manley Turbo Tuff® I-Beam Connecting Rods represent the epitome of precision

Sequential dual-stage pull-type valve: primary (small) valve opens first

This material can be a great choice for you if you live in a dry climate that doesn't see much precipitation

Perfect Fit: OE-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions

Radium Insulating Spacers & Washers (Injectors) 2013-nissan-armada-esi2422828 Valve guides are small cylindricalThermal and electrical insulating spacers and washers for fuel injectors. Engineered by Radium Engineering to reduce heat transfer from engine to fuel injectors while providing electrical isolation for improved performance and reliability. Available Sizes 11mm Compact applications 15mm Standard applications 20mm Extended isolation 27mm Maximum isolation Key Features Thermal insulation reduces heat transfer to fuel injectors Electrical isolation