Heads up — this is a Special Order item. We don't carry it on the shelf, but we can bring it in for you! Lead times vary and can be 10 weeks or more depending on the manufacturer. Give us a call or send us a message so we can check current availability and walk you through your options before you commit to an order.
Oldsmobile 400 425 455 188cc 77cc Aluminum Bare Cylinder HeadAll Speedmaster 18deg. Oldsmobile heads are available with OEM sparkplug location. Standard valve sizes are 2.072 in. Intake and 1.680 in. Exhaust.