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RHS® Flow Charts
Small Block Chevy | Chevy Vortec | Big Block Chevy | Small Block Ford | Gen III LS1, LS2, LS6
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Small Block Chevy Cylinder Head Flow Charts |
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PRO ACTION™ SMALL BLOCK CHEVY - 180cc Runner |
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| RHS® Pro Action™ 180cc cylinder heads are the perfect bolt on head for smaller-displacement Small Block Chevrolet engines. Ideal for 262 to 350 CID street engines, Pro Action™ 180cc cylinder heads are the hot ticket to making up to 325+ flywheel horsepower. With superb finished quality and a long list of desirable standard features -including top-quality COMP Cams® components in fully assembled models, Pro Action™ 180cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1003*
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| Intake
Gasket: |
Fel-Pro #1205*
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| Exhaust
Gasket: |
Fel-Pro #1404*
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| Head
Studs: |
ARP #234-4301*
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| Rocker
Arms: |
COMP Cams® #1301-16, or any
high-performance Small Block Chevy
rocker arm
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| Lifters: |
Determined by application
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| Pistons: |
Determined by application
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| Pushrods: |
Measure for Correct Length
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|
| Manifold: |
Determined by application
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| Spark
Plug: |
See model-specific tech sheet
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| Head
Torque: |
See fastener manufacturers specs
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| Intake
Valve: |
Stainless 2.020"
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| Exhaust
Valve: |
Stainless 1.600"
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| Flat
Milling: |
.006” per cc
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| Valve
Angles: |
23° intake/exhaust
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| Chamber
Size: |
64cc or 72cc
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| Other: |
-
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| *Suggested components only. Individual application must be verified. |
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PRO ACTION™ SMALL BLOCK CHEVY - 200cc Runner |
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| RHS® Pro Action™ 200cc cylinder heads are the perfect street performance head for medium-displacement Small Block Chevrolet engines. Ideal for 327 to 350 CID street/strip engines, Pro Action™ 200cc cylinder heads are the hot ticket to making up to 400+ flywheel horsepower. With superb finished quality and a long list of desirable standard features -including top-quality COMP Cams® components in fully assembled models, Pro Action™ 200cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1003*
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| Intake
Gasket: |
Fel-Pro #1205*
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| Exhaust
Gasket: |
Fel-Pro #1404*
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| Head
Studs: |
ARP #234-4301*
|
| Rocker
Arms: |
COMP Cams® #1301-16, or any
high-performance Small Block Chevy
rocker arm
|
| Lifters: |
Determined by application
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| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
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|
| Manifold: |
Determined by application
|
| Spark
Plug: |
See model-specific tech sheet
|
| Head
Torque: |
See fastener manufacturers specs
|
| Intake
Valve: |
Stainless 2.020"
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| Exhaust
Valve: |
Stainless 1.600"
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| Flat
Milling: |
.006” per cc
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| Valve
Angles: |
23° intake/exhaust
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| Chamber
Size: |
50cc, 64cc or 72cc
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| Other: |
-
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*Suggested components only. Individual application must be verified.
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PRO ACTION™ SMALL BLOCK CHEVY - 220cc Runner |
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| RHS® Pro Action™ 220cc cylinder heads are the race winner’s choice for larger displacement and stroker Small Block Chevrolet engines. Ideal for 383 through 400+ cubic inch max street performance and oval track/drag race engines, Pro Action™ 220cc cylinder heads are the hot ticket to making up to 550+ flywheel horsepower. With superb finished quality and a long list of desirable standard features -including top-quality COMP Cams® components in fully assembled models, Pro Action™ 220cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1003*
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| Intake
Gasket: |
Fel-Pro #1205*
|
| Exhaust
Gasket: |
Fel-Pro #1404*
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| Head
Studs: |
ARP #234-4301*
|
| Rocker
Arms: |
COMP Cams® #1301-16, or any
high-performance Small Block Chevy
rocker arm
|
| Lifters: |
Determined by application
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
|
| Manifold: |
Determined by application
|
| Spark
Plug: |
See model-specific tech sheet
|
| Head
Torque: |
See fastener manufacturers specs
|
| Intake
Valve: |
Stainless 2.020"
|
| Exhaust
Valve: |
Stainless 1.600"
|
| Flat
Milling: |
.006” per cc
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| Valve
Angles: |
23° intake/exhaust
|
| Chamber
Size: |
50cc, 64cc or 72cc
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| Other: |
-
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*Suggested components only. Individual application must be verified.
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PRO ACTION™ SMALL BLOCK CHEVY - 235cc Runner |
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| RHS® Pro Action™ 235cc cylinder heads are the perfect max-effort head for larger displacement and stroker Small Block Chevrolet engines. Ideal for 383 through 421+ cubic inch pro street and oval track/drag race engines, Pro Action™ 235cc cylinder heads are the hot ticket to making up to 650+ flywheel horsepower. With superb finished quality and a long list of desirable standard features -including top-quality COMP Cams® components in fully assembled models, Pro Action™ 235cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1003*
|
| Intake
Gasket: |
Fel-Pro #1205*
|
| Exhaust
Gasket: |
Fel-Pro #1404*
|
| Head
Studs: |
ARP #234-4301*
|
| Rocker
Arms: |
COMP Cams® #1301-16, or any
high-performance Small Block Chevy
rocker arm
|
| Lifters: |
Determined by application
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
|
| Manifold: |
Determined by application
|
| Spark
Plug: |
See model-specific tech sheet
|
| Head
Torque: |
See fastener manufacturers specs
|
| Intake
Valve: |
Stainless 2.020"
|
| Exhaust
Valve: |
Stainless 1.600"
|
| Flat
Milling: |
.006” per cc
|
| Valve
Angles: |
23° intake/exhaust
|
| Chamber
Size: |
64cc or 72cc
|
| Other: |
-
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*Suggested components only. Individual application must be verified.
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Small Block Chevy Vortec Cylinder Head Flow Charts |
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PRO TORKER™ SMALL BLOCK CHEVY - OE Runner |
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RHS® Pro Torker™ Vortec cylinder heads are the perfect bolt on head for smaller-displacement Small Block Chevrolet engines. Ideal for 262 to 350 CID street engines, Pro Torker™ OEM runner Vortec cylinder heads are the hot ticket to making up to 325 flywheel horsepower. With superb finished quality and a long list of desirable standard features -including top-quality COMP Cams® components in fully assembled models, Pro Torker™ OEM runner Vortec cylinder heads deliver maximum value for your performance dollar. |
Intake Manifold: |
Determined by application |
Spark Plug : |
Call for more information |
Head Torque : |
See fastener manufacturers specs |
Intake Valve : |
Stainless 1.940" |
Exhaust Valve: |
Stainless 1.500" |
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Flat Milling : |
.006” per cc |
Chamber Volume : |
64cc |
Lifters: |
Determined by application |
Pistons: |
Determined by application |
Pushrods: |
Measure for Correct Length |
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PRO TORKER™ SMALL BLOCK CHEVY - 170cc Runner |
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RHS® Pro Torker™ Vortec cylinder heads are the perfect bolt on head for smaller-displacement Small Block Chevrolet engines. Ideal for 327 to 350 CID street and “iron head only” oval track engines, Pro Torker™ 170cc Vortec cylinder heads are the hot ticket to making up to 325+ flywheel horsepower. With superb finished quality and a long list of desirable standard features -including top-quality COMP Cams® components in fully assembled models, Pro Torker™ 170cc cylinder heads deliver maximum value for your performance dollar. |
Intake Manifold: |
Determined by application |
Spark Plug : |
Call for more information |
Head Torque : |
See fastener manufacturers specs |
Intake Valve : |
Stainless 2.020" |
Exhaust Valve: |
Stainless 1.600" |
|
Flat Milling : |
.006” per cc |
Chamber Volume : |
64cc |
Lifters: |
Determined by application |
Pistons: |
Determined by application |
Pushrods: |
Measure for Correct Length |
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Big Block Chevy Cylinder Head Flow Charts |
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PRO ACTION™ BIG BLOCK CHEVY - 320cc Runner |
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| RHS® Pro Action™ cylinder heads are the perfect bolt on head for medium-displacement Big Block Chevys. Ideal for 396 to 454 cubic inch engines, Pro Action™ 320cc cylinder heads are the hot ticket to making up to 800+ flywheel horsepower in naturally aspirated trim. With superb finished quality and a long list of desirable standard features, Pro Action™ 320cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1027
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| Intake
Gasket: |
Fel-Pro #1275
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| Exhaust
Gasket: |
Fel-Pro #1410
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| Head
Studs: |
ARP #235-4303
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| Rocker
Arms: |
COMP Cams® #1320-16
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| Lifters: |
Determined by application
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| Pistons: |
Determined by application
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| Pushrods: |
Measure for Correct Length
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|
| Manifold: |
Determined by application
|
| Spark
Plug: |
14mm, ¾” reach
|
| Head
Torque: |
See fastener manufacturers specs
|
| Intake
Valve: |
Stainless 2.250"
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| Exhaust
Valve: |
Stainless 1.880"
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| Flat
Milling: |
.006” per cc
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| Valve
Angles: |
24° intake/15° exhaust
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| Chamber
Size: |
119cc
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PRO ACTION™ BIG BLOCK CHEVY - 360cc Runner |
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| RHS® Pro Action™ cylinder heads are the perfect bolt on head for larger displacement Big Block Chevy motors. Ideal for 454 cid and larger engines, Pro Action™ 360cc cylinder heads are the hot ticket to making up to 1000+ flywheel horsepower in naturally aspirated trim. With superb finished quality and a long list of desirable standard features, Pro Action™ 360cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1027
|
| Intake
Gasket: |
Fel-Pro #1275
|
| Exhaust
Gasket: |
Fel-Pro #1410
|
| Head
Studs: |
ARP #235-4303
|
| Rocker
Arms: |
COMP Cams® #1320-16
|
| Lifters: |
Determined by application
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
|
| Manifold: |
Determined by application
|
| Spark
Plug: |
14mm, ¾” reach
|
| Head
Torque: |
See fastener manufacturers specs
|
| Intake
Valve: |
Stainless 2.300"
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| Exhaust
Valve: |
Stainless 1.880"
|
| Flat
Milling: |
.006” per cc
|
| Valve
Angles: |
24° intake/15° exhaust
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| Chamber
Size: |
119cc
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Small Block Ford Cylinder Head Flow Charts |
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PRO ACTION™ SMALL BLOCK FORD - 180cc Runner |
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| RHS® Pro Action™ cylinder heads are the perfect bolt on head for smaller-displacement Ford Windsor-based engines. Ideal for 260 to 302 CID and 5.0L street engines, Pro Action™ 180cc cylinder heads are the hot ticket to making up to 400 flywheel horsepower in naturally aspirated trim. With superb finished quality and a long list of desirable standard features-including top-quality COMP Cams® components in fully assembled models, Pro Action™ 180cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1152
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| Intake
Gasket: |
Fel-Pro #1262
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| Exhaust
Gasket: |
Fel-Pro #1487
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| Head
Studs: |
ARP #154-4005, 289-302, 5.0L
ARP #154-4003, 351W
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| Rocker
Arms: |
COMP Cams® #1331-16
|
| Lifters: |
Determined by application
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
|
| Manifold: |
Determined by application
|
| Spark
Plug: |
See model-specific tech sheet
|
| Head
Torque: |
See fastener manufacturers
specs
|
| Intake
Valve: |
Stainless 2.020"
|
| Exhaust
Valve: |
Stainless 1.600"
|
| Flat
Milling: |
.006” per cc
|
| Valve
Angles: |
20° intake/20° exhaust
|
| Chamber
Size: |
58cc or 64cc
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PRO ACTION™ SMALL BLOCK FORD - 200cc Runner |
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| RHS® Pro Action™ cylinder heads are the perfect bolt on head for medium-displacement Ford Windsor-based engines. Ideal for 302 to 351 CID and 5.0L street/strip engines, Pro Action™ 180cc cylinder heads are the hot ticket to making up to 550 flywheel horsepower . With superb finished quality and a long list of desirable standard features-including top-quality COMP Cams® components in fully assembled models, Pro Action™ 200cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1152
|
| Intake
Gasket: |
Fel-Pro #1262
|
| Exhaust
Gasket: |
Fel-Pro #1487
|
| Head
Studs: |
ARP #154-4005, 289-302, 5.0L
ARP #154-4003, 351W
|
| Rocker
Arms: |
COMP Cams® #1331-16
|
| Lifters: |
Determined by application
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
|
| Manifold: |
Determined by application
|
| Spark
Plug: |
See model-specific tech sheet
|
| Head
Torque: |
See fastener manufacturers
specs
|
| Intake
Valve: |
Stainless 2.020"
|
| Exhaust
Valve: |
Stainless 1.600"
|
| Flat
Milling: |
.006” per cc
|
| Valve
Angles: |
20° intake/20° exhaust
|
| Chamber
Size: |
58cc or 64cc
|
|
|
|
PRO ACTION™ SMALL BLOCK FORD - 215cc Runner |
|
| RHS® Pro Action™ cylinder heads are the perfect bolt on head for larger displacement and stroker Ford Windsor-based engines. Ideal for 347 through 421+ cubic inch max street performance and race engines, Pro Action™ 215cc cylinder heads are the hot ticket to making up to 650+ flywheel horsepower. With superb finished quality and a long list of desirable standard features-including top-quality COMP Cams® components in fully assembled models, Pro Action™ 215cc cylinder heads deliver maximum value for your performance dollar. |
| Head
Gasket: |
Fel-Pro #1152
|
| Intake
Gasket: |
Fel-Pro #1262
|
| Exhaust
Gasket: |
Fel-Pro #1487
|
| Head
Studs: |
ARP #154-4005, 289-302, 5.0L
ARP #154-4003, 351W
|
| Rocker
Arms: |
COMP Cams® #1331-16
|
| Lifters: |
Determined by application
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
|
| Manifold: |
Determined by application
|
| Spark
Plug: |
See model-specific tech sheet
|
| Head
Torque: |
See fastener manufacturers
specs
|
| Intake
Valve: |
Stainless 2.080"
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| Exhaust
Valve: |
Stainless 1.600"
|
| Flat
Milling: |
.006” per cc
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| Valve
Angles: |
20° intake/20° exhaust
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| Chamber
Size: |
58cc or 64cc
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Gen III LS1, LS2, & LS6 Cylinder Head Flow Charts |
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PRO
ELITE™ GEN III FULL CNC - 210cc Runner |
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| The new RHS® Pro Elite™ 210cc GEN III cylinder heads are the perfect bolt on head for medium-displacement LS1 style street engines. Ideal for 5.7 and 6.0L engines, Pro Elite™ 210cc cylinder heads have been dyno-proven to make from 450 to over 500 rear wheel horsepower, and over 650 flywheel horsepower in naturally aspirated trim using common performance parts. With a massive .800" thick deck, Pro Elite™ 210cc cylinder heads make cylinder head lifting and blown head gaskets in high boost pressure and nitrous oxide applications a thing of the past. |
| Head
Gasket: |
Cometic #C5475-051 |
| Intake
Gasket: |
Factory/FAST™ #54009-8 |
| Exhaust
Gasket: |
Cometic #C5818-030 |
| Head
Studs: |
ARP #234-4110 |
| Rocker
Arms: |
Factory* or COMP Cams® #1509 |
| Lifters: |
Comp Cams® #850-16 or #875-16 |
| Pistons: |
Determined by application |
| Pushrods: |
Measure for Correct Length |
| Accessory
holes: |
Drilled Factory Location |
| *Requires Custom Rocker Stand |
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| Manifold: |
LS1/LS6 or FAST™ LSX™ |
| Spark
Plug: |
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| Head
Torque: |
Manufacturers Specs
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| Intake
Valve: |
Stainless 2.040"
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| Exhaust
Valve: |
Stainless 1.570"
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| Flat
Milling: |
.006” per cc
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| Valve
Angles: |
11°
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| Chamber
Size: |
62cc
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| Notes: |
-
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| Other: |
-
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PRO
ELITE™ GEN III FULL CNC - 225cc Runner |
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| The new RHS® Pro Elite™ 225cc GEN III cylinder heads are the perfect bolt on head for larger displacement LS1 style street engines. Designed 6.0L and larger displacement engines, Pro Elite™ 225cc cylinder heads have been dyno-proven to make from 475 to over 525 rear wheel horsepower, and over 680 flywheel horsepower in naturally aspirated trim using common performance parts. With a massive .800" thick deck, Pro Elite™ 210cc cylinder heads make cylinder head lifting and blown head gaskets in high boost pressure and nitrous oxide applications a thing of the past. |
| Head
Gasket: |
Cometic #C5475-051
|
| Intake
Gasket: |
Factory/FAST™ #54009-8
|
| Exhaust
Gasket: |
Cometic #C5818-030
|
| Head
Studs: |
ARP #234-4110
|
| Rocker
Arms: |
Factory* or COMP Cams® #1509
|
| Lifters: |
Comp Cams® #850-16 or #875-16
|
| Pistons: |
Determined by application
|
| Pushrods: |
Measure for Correct Length
|
| Accessory
holes: |
Drilled Factory Location
|
| *Requires Custom Rocker Stand |
|
| Manifold: |
LS1/LS6 or FAST™ LSX™
|
| Spark
Plug: |
14mm, ¾” reach
|
| Head
Torque: |
Manufacturers Specs
|
| Intake
Valve: |
Stainless 2.040"
|
| Exhaust
Valve: |
Stainless 1.570"
|
| Flat
Milling: |
.006” per cc
|
| Valve
Angles: |
11°
|
| Chamber
Size: |
62cc
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| Notes: |
-
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| Other: |
-
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