S3 Cylinder heads can hold more water flow and have stronger walls, helping with the cooling rate, this improve low and high revs power.
S3 heads are made by forging process and using best alloys available,
Shipping by USPS Retail Ground may take longer than usual with larger box sizes.
We may ship larger dimension orders with UPS even if USPS is chosen at checkout.
Oils ship via ground only.
Phone # 480-299-6038