DescriptionKawasaki® GPZ 1100 1981-1982 Kawasaki® KZ/Z1/Police 1000R 1977-2005 Kawasaki® KZ/Z1 900 1973-1977KPMI® uses U.S. mill certified titanium bar for our retainers. KPMI® Titanium Retainers are engineered using advanced Finite Element Analysis (FEA) software. FEA stress analysis allows our engineers to lighten the retainer without sacrificing strength. All KPMI® retainers are inspected to insure correct fitment on the valve and on the spring. Correct fitment promotes longer component life and optimizes the Performance of the entire valvetrain.MaterialTitaniumQuantityPkg. of 8TypeIntake / ExhaustNoteFits KPMI® Spring Only Kit PN 40-0449Unique Identifier No.FR327789_01GAUS