ProMaxx BB Mopar 237cc CNC Ported (Bare Heads). 2.190"/1.810" valve sizes. Intake 157 224 275 305 318 323 327 330. Exhaust 108 152 184 208 227 239 247 253. LIST PRICE IS FOR BARE SET. 600 Lift Flat Tappet Springs, Steel Retainers & Locks, Viton Seals. Roller Springs, Steel Retainers & Locks, Viton Seals. The item "ProMaxx BB Mopar 383 400 440 237cc CNC Ported Cylinder Heads" is in sale since Tuesday, October 10, 2017. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "precisionautomachine" and is located in McMinnville, Tennessee. This item can be shipped worldwide. Manufacturer…