Manley Severe Duty Exhaust Valve - 1.600 in Head - 0.342 in Valve Stem - 5.036 in Long - Small Block Chevy - Set of 8 11823-8 YA0828MM10 5 on 4-3/4" and 5

5 on 4-3/4" and 5 on 5" bolt patterns

please see CARB EO# D-550-50 for details

Plug-In Hybrid

Brawler Diecast

DIRECT REPLACEMENT KITS INCLUDE ALL REQUIRED HARDWARE AND HOSES FOR A PERFECT LEAK FREE FIT

Manley Severe Duty Exhaust Valve - 1.600 in Head - 0.342 in Valve Stem - 5.036 in Long - Small Block Chevy - Set of 8 11823-8 YA0828MM10 5 on 4-3/4" and 5SEVERE DUTY SERIES Superior Stainless for High Temperature Gasoline Engines Exhaust Material XH 428 with Double the Ultimate Tensile Strength ( at 1500 F ) over the competition Intake Material NK 844 with 1000 Times Better Fatigue Strength than competitors offerings Manley Performance high performance and racing engine parts have been powering winners since 1966. Since our inception in March 1966, Manley Performance Products has been at the forefront