CYLINDER HEADS CHEV SB 23 DEGREE 200CC INTAKE/70CC EXH RUNNERS - STRAIGHT PLUG - 2.02-1.60 STAINLESS VALVES - SPRING INTALL 1.85@100LBS - MAX LIFT .575@300LBS - ONE PAIR. RECOMMEND AUT3924 PLUG 1206 GASKET

Small Block Chevy Performance Aluminum Cylinder Heads

Cylinder Head Material A356.0 Aluminum T6

Combustion Chamber Volume 64cc

Exhaust Runner Volume 70cc

Intake Runner Volume 200cc

Spark Plug Style Straight

Intake Valve Diameter (inch) 2.02

Exhaust Valve Diameter (inch) 1.60

Valve Material Stainless Steel Valves

Spring Install Height (inch) 1.85" @ 100lbs

Maximum Valve Spring Lift (inch) 0.575" @ 300lbs

Outside Diameter of Outer Springs (inch) 1.47

Number of Springs per Valve Dual

Lock Style 7 Degree