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POPULAR PERFORMANCE CYLINDER HEADS
Racing Head Service, a
Company
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
RHS Racing Head Service
Look for the bright orange RHS box!
"PRO ACTION" 23° HEADS FOR SMALL BLOCK CHEVY Description (Bare Heads) Part# Alum/Cast EPWI Elite 200cc Intake Runners: 2.020/1.600 72cc Straight Plug 12043 Aluminum 436.88 393.19 220cc Intake Runners: 2.020/1.600 64cc Straight Plug 12056 Aluminum 398.88 358.99 2.020/1.600 72cc Straight Plug 12045 Aluminum 436.88 393.19 235cc Intake Runners: 2.080/1.600 64cc Angle Plug 12062 Aluminum 428.88 385.99
Optimal design outflows the competition by 5%!
“PRO ACTION” 20° HEADS FOR SMALL BLOCK FORD Description (Bare Heads) Part # EPWI Elite 64cc Chambers: Aluminum 180cc Intake Runners - 2.020/1.600 35015 398.88 358.99 215cc Intake Runners - 2.080/1.600 35017 439.88 395.89
Note: For all heads, chamber-to-dome clearances must be checked. Valve-to-piston clearances should be checked when using high lift cams. Chamber sizes listed are minimums. Chamber volumes must be checked prior to installation. See Racing Head Service catalog for specifications and application details. “PRO ACTION” BIG BLOCK CHEVY HEADS Description (Bare Heads) Part # EPWI Elite 119cc Chambers: 320cc Intake Runners - 2.250/1.880 11011 759.88 692.89 360cc Intake Runners - 2.300/1.880 11012 759.88 683.89
PERFORMANCE BLOCKS With RightCast ® Technology!
World Products
CAST IRON BLOCKS
Part #
Description Merlin lll Merlin lll Merlin IV
Engine
Deck
Bore
Mains
Caps
EPWI
Elite
081101 081111 091103
BB Chevy BB Chevy SB Chevy
9.800” 10.200”
4.490” 4.490” 4.245"
Std. Std. Std.
Nodular Iron Nodular Iron Nodular Iron
2,104.46 2,104.46 2,104.46
1,894.01 1,894.01 1,894.01
9.800"
SMALL BLOCK CHEVY CAST IRON CYLINDER HEADS
Part #
Description
Intake 200cc 200cc 220cc
Chamber
Valves
Spark Plug
EPWI
Elite
011150 012250 014150
Spor tsman II Spor tsman II Motown 220
64cc 72cc 64cc
2.020/1.600 2.020/1.600 2.080/1.600
Angle
377.46 377.46 377.46
339.71 339.71 339.71
Straight
Angle
BIG BLOCK CHEVY CAST IRON CYLINDER HEADS
Part #
Description
Intake 269cc 320cc
Chamber
Valves
Port Shape
EPWI
Elite
030040 030620
Merlin III Merlin III
119cc 119cc
2.300/1.880 2.300/1.880
Oval
579.54 579.54
521.59 521.59
Rectangle
SMALL BLOCK FORD CAST IRON CYLINDER HEADS
Part #
Description Windsor Jr. Windsor Sr.
Intake
Chamber
Valves
EPWI
Elite
053030 053040
180cc 200cc
58cc 64cc
1.940/1.600 2.020/1.600
359.93 359.93
323.94 323.94
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