
Mid-USA - VALVE TRAIN KITS FOR BIG TWIN
Item ships direct from supplier when available. Some items will be in stock and ship immediately, and others will have a lead time. Please contact us for more information. You will receive a lead time confirmation upon placing an order.
Fits These Vehicles
Fits These Vehicles
Shipping & Returns
Shipping & Returns
Description
- Kits contain stainless steel Street Master valves, performance double spring assemblies, steel top collars and specially machined lower spring collars included in Shovelhead kits and machined keys perfectly matched for maximum performance
- Evolution kits include all of the above but are designed to be used with your existing lower collars
- Spring assemblies included require no cylinder head machining for installation
Manley
.550" Lift Kit
Fits Big Twin Evolution all years
Produces 180 pounds of seat pressure
By: MANLEY PERFORMANCE











