Part of a joint design between Ford Racing and Robert Yates, the N351 Sportsman cylinder head is specifically engineer for use in stock car competitions. These cylinder heads are THE cylinder head to have on your 351 Windsor-style engine, whether you are running at Daytona, or through the back 40.
Bare Head (64cc Chamber)
For Use In NASCAR Late Model Stock, WISSOTA, I.M.C.A., D.I.R.T., And Most Other Stock Car Sanctioning Groups On 351W Engines
Machined For 2.02" Intake And 1.60" Exhaust Valve Diameters
Intake And Exhaust Valves Have Been Moved .070" To Unshroud The Intake Valve
Valve Angle Changed From 20 Degrees To 10 Degrees To Further Improve Air Flow
Intake Port Volume 200cc, Exhaust Port Volume 82cc ( +/- 2cc nominal)
Thick Deck And Reinforced Structure For Improved Sealing, Increased Section Thickness In Critical Areas And Webbed Rocker Bosses For Improved Strength.
This Head Can Be Milled Flat Up To 0.150", Which Will Yield Approximately A 42.0cc Combustion Chamber Volume.
Designed For Stud Mount Rocker Arms. Compatible With Stock And Ford Racing Intake M-9424-N302
These Heads Use .708" Reach Taper Seat Spark Plugs
Uses Felpro Exhaust Gasket Part Number 1427
Requires M-6564-F351C Or M-6564-F351 Roller Rocker Arms With .150" Offset Intake Pushrod Cup
Unique Header Flange Required
Check Head Bolt Length, may require non-stock length head bolt Parts to assemble: M-6566-D351 Pushrod guide plate (pkg. of 8); M-6527-C311 Rocker arm studs (pkg. of 16); M-6505-A351 High-flow stainless steel exhaust valve; M-6507-A351 High-flow stainless steel intake valve; M-6514-A50 Retainers (pkg. of 16)