This is a 100% Brand NEW Big Valve High Compression Cylinder Head for Triumph Spitfire 1500 and MG Midget 1500. It has 1.557 Intake Valves, 1.279 214N Stainless Exhaust valves, Dual Valve Springs, Light weight valve retainers and keepers. The head is a 100% new casting, with a combustion chamber that is .545 inches deep with a thickness of 3.050 inches. The compression ratio on the Triumph Spitfire 1500 Or MG Midget 1500 with flat top pistons is 9 to 1. Please note that we try and stock this item in Tennessee and Oregon and will ship from the location nearest the buyer when possible. But sometimes we may only have it in one location and so it may ship the longer way.