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PERFORMANCE
CYLINDER HEADS
& COMPONENTS
1.877.776.4323
RACINGHEADSERVICE.COM
SMALL BLOCK CHEVY
The 23-Degree RHS™ heads deliver exceptional out-of-the-box performance gains for Small Block Chevrolet applications. Available in aluminum or
cast iron, the RHS™ SBC heads are the optimum choice for a variety of
performance applications including street rods, muscle cars, drag racing and
oval track racing.
Other features include straight or angle spark plugs, bronze guides, multiangled inlet and radius exhaust with ductile iron seats.These heads accept
1.550” springs and standard style rockers and valve train.
RHS™ PART# PRO TOPLINE PART# DESCRIPTION
Aluminum 72cc Chamber - As Cast
12001
123 2000 80
Pro 23º-180cc Runner-Straight Plug
12002
123 2000 80A
Pro 23º-180cc Runner-Angle Plug
12003
123 2000 00
12004
123 2000 00A
12005
123 2000 20
12006
123 2000 20A
12007
123 2000 35
12008
123 2000 35A
12022
123 4000 80
12023
123 4000 80A
12024
123 4000 00
12025
123 4000 00A
12026
123 4000 20
12029
123 4000 20A
12030
123 4000 35
12032
123 4000 35A
Aluminum 72cc Chamber - CNC Chamber
12011
123 2600 20
12012
123 2600 20A
12013
123 2600 35
12014
123 2600 35A
12033
123 4600 20
12034
123 4600 20A
12035
123 4600 35
12036
123 4600 35A
Cast Iron 72cc Chamber - As Cast
12301
223 2000 80
12302
223 2000 80A
Pro 23º-180cc Runner -Angle Plug
12303
223 2000 00
12304
223 2000 00A
12305
223 2000 20
12306
223 2000 20A
12307
223 2000 35
12308
223 2000 35A
12317
223 4000 80
12318
223 4000 80A
12319
223 4000 00
12320
223 4000 00A
12321
223 4000 20
12322
223 4000 20A
12323
223 4000 35
12324
223 4000 35A
12333
223 5000 00
12334
223 5000 00A
12335
223 5000 20
12336
223 5000 20A
Cast Iron 72cc Chamber - CNC Chamber
12309
223 2600 20
12310
223 2600 20A
12311
223 2600 35
12312
223 2600 35A
Cast Iron 64cc Chamber - CNC Chamber
12325
223 4600 20
12326
223 4600 20A
12327
223 4600 35
12328
223 4600 35A
VALVE SIZES/LENGTH
APPLICATION
APPROX. HP
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
Street perf. up to 350cu
Street perf./short track 327-350cu to 6500rpm
Max street perf./oval track/drag 383-400cu to 7500rpm
Race head unlimited oval/drag 400cu+ 8000rpm+
325
325
325-400
325-400
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.080”/1.600”
2.080”/1.600”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
325
325
325-400
325-400
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
+.100”
+.100”
+.100”
+.100”
Max street
Max street
Race head
Race head
perf./oval track/drag 383-400cu to 7500rpm
unlimited oval/drag 400cu+ 8000rpm+
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.080”/1.600”
2.080”/1.600”
+.100”
+.100”
+.100”
+.100”
Max street
Max street
Race head
Race head
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
325
325
325-400
325-400
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.080”/1.600”
2.080”/1.600”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
+.100”
325
325
325-400
325-400
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
+.100”
+.100”
+.100”
+.100”
325-400
325-400
400-550
400-550
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
2.020”/1.600”
+.100”
+.100”
+.100”
+.100”
Max street
Max street
Race head
Race head
400-550
400-550
550-650
550-650
2.020”/1.600”
2.020”/1.600”
2.080”/1.600”
2.080”/1.600”
+.100”
+.100”
+.100”
+.100”
Max street
Max street
Race head
Race head
400-550
400-550
550-650
550-650
BIG BLOCK CHEVY
Winning performance, superior engineering and unmatched quality are the foundations of the RHS™ legacy, and the 24-Degree RHS™ Big Block Chevy heads have
all of that and more. RHS™ BB Chevy heads are a tremendous performer for
Chevy Big Block-powered street, drag race and powerboat applications. In addition, the RHS™ BB Chevy head is available in aluminum or a cast iron version for
racers that run “iron only” classes. Regardless of material choice, RHS™ BB Chevy
heads offer more features, higher flow characteristics and better finishing quality
— ultimately yielding more HP for your Big Block Chevy!
RHS™ PART# PRO TOPLINE PART#
DESCRIPTION
VALVE SIZES/LENGTH
Aluminum 119cc Chamber - As Chamber
11001
124 19000 320
Pro 24º-320cc
2.250”
11002
124 19000 360
Pro 24º-360cc
2.300”
11003
124 19600 320
Pro 24º-320cc
2.250”
11004
124 19600 360
Pro 24º-360cc
2.300”
11301
224 19000 320
Pro 24º-320cc
2.250”
11302
224 19000 360
Pro 24º-360cc
2.300”
APPLICATION
APPROX. HP
+.250”/1.880” +.100”
+.250”/1.880” +.100”
High street performance/strip
800-850
850-1000
+.250”/1.880” +.100”
+.250”/1.880” +.100”
Bracket drag racing/powerboat
Bracket drag racing/powerboat
TBA
TBA
+.250”/1.880” +.100”
+.250”/1.880” +.100”
Street performance
800-850
850-1000
SMALL BLOCK FORD WINDSOR
RHS™ advanced engineering, proven performance and unmatched finishing quality is
now available for Small Block Ford Windsor and 5.0-Liter applications. Available in
either cast iron or aluminum, the RHS™ SB Ford Windsor heads offer a choice of
three different intake runner sizes - 180cc, 200cc or 215cc.The 180cc and 200cc
options come with a 2.020” intake valve while the 215cc option comes with a 2.080
intake valve; all options run a 1.600” exhaust valve.The RHS™ SB Ford Windsor head
accepts all original equipment and aftermarket performance parts, making installation
and assembly simple.The results: RHS™ heads offer more horsepower potential than
any other SB Ford cylinder head available.
RHS™ PART# PRO TOPLINE PART#
DESCRIPTION
VALVE SIZES/LENGTH
35001
120 4000 180
Ford SB-180cc Runner
2.020”/1.600” +.100”
35002
120 4000 200
2.020”/1.600” +.100”
35003
120 4000 215
2.080”/1.600” +.100”
35004
120 8000 180
2.020”/1.600” +.100”
35005
120 8000 200
2.020”/1.600” +.100”
35006
120 8000 215
2.080”/1.600” +.100”
Cast Iron 64cc Chamber - As CastORD CYCLONE IRON
35301
220 4000 180
2.020”/1.600” +.100”
35302
220 4000 200
2.020”/1.600” +.100”
35303
220 4000 215
2.080”/1.600” +.100”
35304
220 8000 180
2.020”/1.600” +.100”
35305
220 8000 200
2.020”/1.600” +.100”
35306
220 8000 215
2.080”/1.600” +.100”
APPLICATION
APPROX. HP
Street 302-351 1500-6500rpm
High rpm street/race 3500-8000
Max performance 347-421 4500-8500
325-400
400-550
550-650
Street 302-351 1500-6500rpm
325-400
400-550
550-650
Street 302-351 1500-6500rpm
325-400
400-550
550-650
Street 302-351 1500-6500rpm
325-400
400-550
550-650
HONDA V-TEC
The RHS™ Honda V-Tec head utilizes advanced airflow and cooling technology
to deliver the most “out of the box” performance available.The unique RHS™
manufacturing process, strict tolerances and superior engineering eliminate the
need for extensive final machining. Ideal for racing or high performance street
applications, the aluminium RHS™ Honda V-Tec head incorporates features such
as a multi-angle seat design, hardened valve seats and improved valve guide
material for maximum Honda V-Tec performance.
• More efficient water jacket design for better
heat dissipation & constant performance
• Reinforced deck for higher boost & cylinder pressures of turbocharged, supercharged & nitrous
applications
• Specially designed runners & chambers
maximize volume, atomization and velocity
• Additional port and chamber material for custom
CNC porting
RHS™ PART#
PRO TOPLINE PART#
DESCRIPTION
VALVE SIZES/LENGTH
APPLICATION
57001
CHHO-18HPV
Honda GSR V-Tec - As Cast
OEM
Street, race performance
APPROX. HP
TBA
MORE POWER
OUT OF THE BOX!
RHS™ cylinder heads feature innovative port & water jacket
designs to deliver out of the box performance.
Racing Head Service™ - a dominant force in the
history of cylinder head technology - is back with the
latest in head design. Utilizing the acquired resources
of Pro TopLine cylinder heads and the industry’s
largest engineering team, RHS™ now has the most
advanced cylinder heads on the market; providing
more horsepower - right out of the box.
Gone are the days of purchasing new cylinder heads
only to discover that extensive final machining is
required for optimum performance. The unique RHS™
manufacturing process and design now ensure better
chamber and runner volumes and improved
port-to-chamber surface transitions. These processes
allow RHS™ to hold extreme tolerences, achieving “as
cast” standards that weren’t possible in the past. All of
this translates into more power for your engine, without
the extra machine work you had to do in the past.
At RHS™ we know that you can’t see nor can you fix a
problem in your water jackets, so we paid special
attention to the design and manufacturing processes
that affect this area. By improving the water
chamber’s flow we are able to reduce “hot spots” and
heat buildup in the head, allowing our heads cooler
operating temperatures throughout for better
performance & HP.
RHS™ offers a wide range of runner and combustion
chamber sizes to perfectly match any engine
combination, further eliminating the need for
time-consuming and expensive after-purchase
machining. It is truly the dawn of a new era in cylinder
head
performance;
ultimate
cylinder
head
performance is now as simple as opening a box!
TM
www.racingheadservice.com
1.877.776.4323
3416 Democrat Rd. Memphis, TN 38118
RHS#101-06

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