These are a set of unbranded aluminum bare cylinder heads i got…

These are a set of unbranded aluminum bare cylinder heads i got on ebay. They were said to have part number AP-330803-8567 tho its not marked anywhere on the heads and claimed to have interchange parts number of Speedmasters PCE281.1556 heads. i bought them for $175 each with free shipping. so $350 for both at my door.

they are 190cc intake runner size. they have a 62cc chamber size. intake valve is 2.02 and exhaust is 1.60 size. they have 1/2 inch head bolt holes and came with bushings for 7/16 bolts.

i bought these bare and had a local machine shop inspect and assemble them. they told me that the heads were defiantly not square so a resurfacing was done but everything else seemed fine. it may have decreased the chamber size by a small amount. they shop put in some stainless valves and lapped the valves to ensure sealing.a basic roller valve spring kit was installed. they said the springs will be able to handle -low 5s of lift- as they said. not 100 percent sure how much i can get away with but with such large valves i dont need much lift anyways.

the machine shop charged me $489 total. the valves were $11 each so $176 for all 16. they charged me $148 for the valve spring kit including retainers and locks. valve lapping and assembly cost me $75 and the resurfacing cost me $90.

Owner caption December 2017 · Photo 124 of 285