This is the 'new' Fullauto head. A improved version of the original stopped being produced several years ago. While the 1st generation heads were great, this new one is improved in several areas from the very core and up.

• Made in newly designed core boxes to ensure an unsurpassed quality casting
• Casting materail is of highest quality
• The head is complete with bronze valve guides installed
• Valve guides made in house to highest quality specs. Using a 630 Aluminum Nickel Bronze
• The seats are superior using a Moldstar 90 material. Cut to a 3 angle profile
• There are top quality thread inserts installed for the 3 lower studs changing the weak original fine thread to a stronger SAE 3/8-16 thread
• The exhaust ports are 'D' shaped like the original that is a proven design to generate improved flow characteristics
• The intake ports are completely machined for a seamless port
• Included are 3 steel ARP lower studs (3/8-16 x 3/8-24)
• Included is a 12 point ARP nut (3/8-24 thread, 7/16 wrenching)
• Included are 2 stainless steel, heat treated sleeve nuts made by cNw. These are also 12 point heads for easy wrenching (3/8-24 thread, 7/16 12 point wrenching)
• Option to complete cNw ARP head hardware kit
• Stock valve train, springs, valve covers, spindle covers, over head oil lines will all fit
• The head is cast in California and then finished at the state of the art machine shop in Jacksonville, Florida (STS)

Note: The machine shop that have been making these heads, STS, will no longer be making them as they are focusing on different product lines. This means that once these heads are sold out, there will be no more available. As of 1/1/2026, I will have about 25 850cc heads and a 3 750cc heads. If you think you will be wanting one of these heads now or in a near future, best to get one while you still can.