World Products 020650-4 - World Products BB-Chevy Merlin III Aluminum Heads

Make An Excess Of 800 HP With No Porting!

This is the World Products cylinder head that highly respected drag racers like Scotty Richardson employ to win NHRA National event titles and literally hundreds of thousands of dollars in high stakes ET Bracket Races. Merlin III is a true high performance head, capable of supporting in excess of 800 HP out of the box. Take your pick between 310cc or 350cc intake runners. Assemblies include premium quality Manley RaceMaster or Severe Duty valves.

Technical Specifications
Material:	355-T6 high density aluminum alloy
Valve Seats:	Steel intake, hardened steel exhaust
Valve Guides:	Bronze
Valve Spring Seats:	Machined for 1.640'' springs
Valve Size:	2.300'' x 1.880''
Rocker Arm Studs:	7/16'' screw-in style with hex shoulder
Exhaust Flange:	Stock port location w/accessory bolt holes
Included In Base Assembly:	Manly RaceMaster (-1 models) or Severe Duty (-3 & -4 models) 1-piece forged stainless steel valves with swirl-polished heads, ring & band style (-1 models) or PC style (-3 & -4 models) valve seals, 1.550'' (-1 & -3 models) or 1.640'' (-4 models) valve springs, Manley 7° Chrome Moly (-1 models), 10° Chrome Moly (-3 models) retainers, keepers and pushrod guide plates. -4 models have 10° Titanium retainers.

Recommended Installation Items
Head Gaskets:	Fel-Pro 375-1017-1 or equivalent
Pushrods:	Requires heat treated pushrods
Spark Plugs:	Accepts 14mm .750'' reach gasketed 5/8'' hex (NGK 7496 or 4930 or equiv.). Heat range may vary. Consult with engine builder.
Intake Gasket:	Fel-Pro 375-1211 or equiv.
Exhaust Gasket:	Fel-Pro 375-1410 or equiv.
Head Bolts:	8 longer than stock required (World 955-073010)