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Big Block Cylinder Heads

18º Super Mod Port Big Chief Looking to step up your engine’s performance? Take the 80 Hp jump with a set of 18º Super Mod Big Chief heads.	18º Full Port Big Chief Heads Take full advantage of your step up to Big Chief performance with a set of Reher-Morrison Full Port 18º Big Chief heads.	14º Rect. Port CNC Big Chief Heads The 14º Rect. Port CNC Big Chief heads out perform a fully ported 18º Big Chief head without the need of a custom 14º Oval Port intake.

**NEW! Dart 370cc BEAST BEAST and BEAST 2 CNC Cylinder Head Pushing the conventional BBC head to extremes! Constantly striving to improve its products, Reher-Morrison has enhanced the flow of its original Dart 370 "Beast" cylinder heads with the all new "Beast 2". They come standard with Manley Titanium valves, 2.325" Intakes/1.850" Exhaust and Manley NexTek valve springs. The reduced chamber volume supports a smaller dome piston, which means a faster burn chamber with less ignition timing. More fuel burned in less time means increased performance! Utilizing data gathered from the R & D of our Pro Stock engine program, we have designed an updated CNC program. Our dynamic 5-axis CNC machines can now generate a port capable of flowing 435cfm from a 370 cc intake port. This much flow from such a relatively small port means greater velocity to create the maximum performance available in a conventional 24 degree Big Block Chevrolet cylinder head! Beast comes with 2.300/1.880 Stainless valves . Fully CNCed, blended by hand an flowed 350cfm@.500 and 420+cfm@.800. 290cfm@.800 exhaust. The thick decks on the Dart 360 head castings make them ideal for heavy nitrous or blower applications. Beast 2 comes with 2.325/1.880 Titanium valves . Angle milled for smaller chambers and many other modifications to squeeze every last bit of power from these heads. 360cfm@.500 and 430cfm@.800. 300cfm@.800 exhaust. UPDATE,, Dart 360 Beast 2 makes 1025hp @ 8100rpm on a 522cid engine with cast single 4 barrel! UPDATE,, Dart Beast 2 makes 1100+hp @ 7800rpm on a 572 engine with cast single 4 barrel!** If you are running a Big Block Chevrolet engine with a 4.600" or larger bore, the Dart 360 "Beast " cylinder heads are exactly what you need!

The New Raptor 12º Spread Port Exclusively from

This head can only be purchased from Reher-Morrison. It is a true proprietary cylinder head design exclusive to Reher-Morrison. It is like no other Spread port head on the market. Works great with Nitrous!

This is not the Profiler 12 degree

The Raptor is a break-through in BBC spread port cylinder head development. Raptor cylinder heads are designed by Reher-Morrison and contain features and benefits not found in any other spread port heads. These are Cutting-Edge Pro Stock style intake ports utilizing High velocity/Wet flow technology found in no other Big Block Chevy head on the market today! With over two years in development Reher-Morrison has created a cylinder head capable of producing more power in a Big Block Chevy than was previously possible.

The NEW Raptor components include:

Reher-Morrison 12º Raptor BBC Cylinder Heads
1.645" O.D. Triple Pacaloy Springs
10º Titanium Retainers
10º Heat-Treated Comp Cam Valve Locks
Manley 2.450"/1.850" Custom Titanium Valves
423+ cfm@.500 525 cfm@.800 535 cfm@.900 540 cfm@1"
Flows more air per valve size than any other Spread Port cylinder head!
65cc Chambers 465cc Intake Ports
Variable valve sizes available for specific applications. 2.450 / 1.850 standard
Uses standard BBC Spread port cylinder head components. less costly to update!
Faster throttle response when using a throttle stop.
Broader horsepower and torque curve than other BBC Spread port cylinder heads.
More potential horsepower per dollar than any other BBC cylinder head
Provides the next level of BBC performance for Nitrous, Blown or Normally Aspirated applications.

UPDATE Raptor heads make 2000hp on nitrous 622! UPDATE Raptor heads make over 2200hp on Super Charged 540!

14º CNC Oval Port Big Chief Heads

All of the power secrets that Reher-Morrison has learned in its Pro Stock R&D program are in the 14º Oval Port CNC Big Chief heads. With in-house CNC machining centers, Reher-Morrison can produce state-of-the-art cylinder heads at a price that serious sportsman racers can afford.

It starts with special shaved-core castings from DART that have extra material in the ports and chambers. We CNC machine the oval intake runners, steep combustion chamber walls, and elliptical exhaust ports _ exclusive RMRE designs that incorporate the latest advances in Pro Stock airflow technology. Reher-Morrison cylinder head specialists finish the critical seats and bowls by hand and install 16 titanium valves.

NOT your average oval port !

14º Oval Port CNC Big Chief components include:

Reher-Morrison 14º Oval Port CNC Big Chief Heads
Manley 2.450/1.850" Titanium Valves
10º Heat-Treated Comp Cam Valve Locks
1.645" Comp Cams PacAlloy springs
10º Manley Titanium retainers

400cfm@.500 500cfm@.800