- Engines & Components
- Cylinder Heads
- World Products Big Block Chevy Merlin III Cast Iron Cylinder Heads
Improved Performance Over Chevy's Legendary LS6 Heads!
Merlin 269cc Oval Port heads are excellent for most street-driven big-blocks up to 468ci. They'll out-perform larger heads in many applications. When larger engines (454 to 540ci) require added flow, choose the Merlin Rectangle Port cylinder heads. With RightCast 320cc and 345cc intake runners, you can expect solid gains in air/fuel mixture combustion charges. These World Products heads will really respond to higher compression ratios, and are ideally suited for hot street/strip cars.
Show More
Technical Specifications
- Material: High density cast iron
- Valve Seats: Integral intake,hardened steel exhaust
- Valve Guides: Integral cast iron
- Valve Spring Seats: Bare castings machined for 1.550'' springs
- Valve Size: 2.300'' x 1.880''
- Exhaust Flange: Port location raised .250'' , accessory bolt holes, requires ARP Head Bolts #070-135-3605.
- Included In Base Assembly: Erson stainless steel valves, ring and band style (-1 and -2 models) or PC style (-3 and -4 models) valve seals, 1.550'' (-1, -2 and -3 models) or 1.640'' (-4 models) valve springs, Erson 7° (-1 and -2 models) or 10° (-3 models) retainers and keepers.
Recommended Installation Accessories - Head Gaskets: Fel-Pro 375-1017-1 or equivalent
- Pushrods: Requires heat treated pushrods
- Rocker Arm Studs: 7/16'' with 7/16''-14 base thread
- Pushrod Guideplates: BBC Stepped 3/8''
- Spark Plugs: Accepts 14mm .460'' reach tapered seat 5/8'' hex (AC Delco R42TS/R43TS) or equivalent. Heat range may vary. Consult with engine builder.
- Intake Gasket: Fel-Pro 375-1212 or equivalent for oval port head. Fel-Pro 375-1211 or equivalent for rectangle port head.
- Exhaust Gasket: Fel-Pro 375-1410 or equivalent
- Head Bolts: 8 longer than stock required (955-832015-8)
Filter Results
AVAILABILITY
free shipping
PART TYPE
PART TYPE
BRAND
BRAND
RATING
Part Fitment
Part Category
Vendor Part Number
Maximum Valve Lift
Accessory Bolt Holes Drilled
Exhaust Valve Diameter
Intake Valve Diameter
Outside Diameter of Outer Spring
Valve Seats Machined
Intake Runner Volume cc
Intake Valves Included
Damper Spring Included
Heat Crossover
Valve Springs Included
CNCMachined Combustion Chamber
PRICE
Big Block Chevy Merlin III Cast Iron Oval-Port Cylinder Heads
World Products 030040-1
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 269cc Oval Intake Ports
$1,450.86
(1)
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee
World Products 030040-2
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 269cc Oval Intake Ports
$1,493.79
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee
Big Block Chevy Merlin III Cast Iron Rectangular-Port Cylinder Heads
World Products 030620
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 320cc Rectangular Intake Ports
$1,123.15
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee
World Products 030620-3
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 320cc Rectangular Intake Ports
$1,641.14
Estimated to ship direct from manufacturer on 09/23/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
$1,641.14
Estimated to ship direct from manufacturer on 09/23/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
World Products 030620-2
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 320cc Retangular Intake Ports
$1,493.79
Estimated to ship direct from manufacturer on 09/23/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
$1,493.79
Estimated to ship direct from manufacturer on 09/23/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
World Products 030630
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 345cc Rectangular Intake Ports
$1,123.15
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee
World Products 030630-2
World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 345cc Rectangular Intake Ports
$1,493.79
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee
Merlin - Cast Iron Rectangular Port
345cc Intake, 119cc Combustion Chambers, 2.300/1.880'' (11/32'') Valves
World Products 030630-3
World Products Big Block Chevy Merlin III Cast Iron Cylinder HeadsAssembled w/1.550" Dual Valve Springs for Hydraulic Roller Cam (Each)
$1,641.14
Estimated to ship direct from manufacturer on 09/23/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
$1,641.14
Estimated to ship direct from manufacturer on 09/23/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
Big Block Chevy Merlin III Cast Iron Oval-Port Cylinder Heads
World Products 030040
World Products 030040 Big Block Chevy Merlin III Cast Iron Cylinder Head [269cc Oval Intake Ports]
$1,123.15
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee
Big Block Chevy Merlin III Cast Iron Rectangular-Port Cylinder Heads
World Products 030630-1
World Products 030630-1 Big Block Chevy Merlin III Cast Iron Cylinder Head [345 cc Rectangular Intake Ports]
$1,450.86
Estimated to ship direct from manufacturer in 24hrs
FREE Shipping
Lowest Price Guarantee