Pro Action cylinder heads by RHS deliver exceptional
performance gains for all small block Chevy owners.
Pro Action small block Chevrolet cylinder heads features
ALUMINUM HEADS
Straight or Angled spark plug (specify with order)
64cc or 72cc combustion chambers (specify with order)
180cc or 200cc 215 CC intake runners (specify with order)
Multi-angled intake valve seats
Radius exhaust valve seats
Improved valve guide design
Highly efficient water jacket
Manganese intake valve guides
Bronze exhaust valve guides
Hardened valve seats
Extra-thick deck faces
ASSEMBLED  WITH A INDY PERFORMANCE PARTS VALVE
TRAIN KIT
1.460" OD 130lb @ 1.800 .550 lift  Valve Springs
Stainless Steel PERFORMANCE  2.02" & 1.600" Valves
Teflon Valve Seals
Chrome Moly Retainers & locks
3/8 OR 7/16 Screw In Studs & Guide Plates
1350.00 SHIPPED
New Pair of RHS Racing Head Service Pro Action
Aluminum Cylinder Heads for 396 402 427 454 502 BB Chevy

A First-rate performance, progressive engineering and unmatched quality
are the foundations of the Pro Action™ head series, and the RHS® BBC
heads feature all of them and more. Capable of making up to 1000
horsepower, Pro Action™ BBC Cylinder Heads provide you with more
features, better flowchart numbers and  a tremendous performer for Big
Block Chevy street, drag race and powerboat applications.

Patented Clean Cast™ Technology provides superior port-to-chamber
transitions & optimal airflow efficiency
Hardened multi-angle intake & radiused exhaust valve seats are utilized
to outflow the competition by up to 5%
Premium bronze valve guides for superior heat dissipation & longer life
Refined water jacket design improves thermal conductivity & extra thick
deck faces allow angle milling for compression
Multi-angled intake valve seats
Radiused exhaust valve seats
Improved valve guide design
Highly efficient water jacket  
Manganese intake valve guides
Bronze exhaust valve guides
Hardened valve seats
Extra-thick deck faces
Combustion Chamber Volume 119cc
Intake Runner Volume 320cc
Exhaust Runner Volume 135cc
Intake Port Shape Rectangular
Intake Port Location Standard
Exhaust Port Shape Rectangular
Exhaust Port Location Raised
Spark Plug Style Angle
Intake ERSON COMPETITION SERIES  Valves Diameter 2.250 in.
Exhaust ERSON COMPETITION SERIESValves Diameter (in)1.880 in
ERSON Valve Springs Maximum Valve Lift  650 125lb @ 1.900   
ERSON /PBM Retainers  CHROME MOLY
7 degree  MACHINED KEEPERS
Valve Stem Seal StyleViton
PBM Rocker Arm 7/16-20 in.
PBM Guideplates  Pushrod Size3/8 in.
Valve Cover Mounting Style Perimeter bolt
Accessory Bolt Holes Drilled
Intake Valve Angle 24
Exhaust Valve Angle15
Exhaust port raised 0.500 in. from stock
Cylinder Heads for Small Block Ford 289 302 331 Stroker 347
Stroker 351W 393 Stroker  408 Stroker or 427 Stroker engines
with up to .550" lift flat tappet camshaft
Features:
Multi-angled intake valve seats
Radiused exhaust valve seats
Improved valve guide design
Highly efficient water jacket
Manganese intake valve guides
Bronze exhaust valve guides
Hardened valve seats
Extra-thick deck faces
Combustion Chamber Volume 58cc or 64cc
Intake Runner Volume 200cc 180CC 215CC
Exhaust Runner Volume 66cc
Intake Port Shape Rectangular
Intake Port Location Standard
Exhaust Port Shape Square
Exhaust Port Location Standard
Spark Plug Style Angle
INDYPERFORMANCE PARTS VALVE TRAIN KIT
Intake Valves Diameter 2.02 in.
Exhaust Valves Diameter (in)1.600 in
Valve Springs Maximum Valve Lift .550 in. 130lb @ 1.800
Retainers  CHROME MOLY
Locks  Style 7 degree
Valve Stem Seal Style Viton
Rocker Arm Studs Nut Thread Size 3/8-16 in.
Guideplates  Pushrod Size 5/16 in.
1350.00 SHIPPED
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Comments:
UPGRADE SPRING PACKAGES AVAILABLE
UPGRADE SPRING PACKAGES AVAILABLE
UPGRADE SPRING PACKAGES AVAILABLE
1950.00 SHIPPED
CAST IRON AVAILABLE ON ALL HEADS
CAST IRON AVAILABLE ON ALL HEADS
SBC