570HP Chevy 350 Cylinder Heads, 225 CNC Ported Assembled Solid Roller Street, 64cc Alloy Angle Plug Small Block Chevy

Small Block Chevy 350, CNC Ported Cylinder Heads with as Cast Chambers.

Assembled @ Total Performance in Australia & suitable for Street Solid Roller, max 7000 RPM & .650" lift.

Utilising Comp Cams Street Series Valve Springs & Ferrea 5000 Series Valves. 

DETROIT RACING PRODUCTS Cylinder heads. 

Chevy 350 23 Degree DRP Aluminium Cylinder heads - CNC ported. 

DRP’s Small Block Chevy cylinder heads offer a cylinder head with improved port and combustion chamber designs that result in “Bolt on Horsepower”!

Cylinder Heads play such a critical role in your engine and performance cylinder heads usually come at a significant cost. The DRP range of Cylinder heads are easy on the budget while delivering on performance, precision and quality. The DRP “as-cast” ports and chambers perform out of the box. These CNC versions are an improvement on the As Cast versions.

DRP have not CNC machined the combustion chambers, because they dont have to. The Chambers are perfect as cast! An added benefit is the combustion chamber stays small, maintaining compression.

DRP CNC Ported Chevy 350 Cylinder heads Advantages:

• These heads flow HP all with a 2.02" diameter valve. (can be taken out to 2.080" valve)
• Angle Spark Plug location. 
• CNC Port Shape, High Torque inlet runners that flow 573hp @ .600" lift
• 228cc Intake runner volume (CNC Ported)
• 88cc Exhaust  (CNC Ported)
• 64cc Chamber size (As Cast)  (these heads can be milled down to 60cc)
• Crisp throttle response. 
• Internal Cast Quality + Thick (Super Smooth Water Jackets for maximum flow - see our photos of the internal casting quality) 
• Optimal Spark Plug position. The copies dont have this location. Great for Dome top pistons. 
• Premium Bronze Valve Guides. 0.570" OD 

DRP Chevy 350 CNC Ported Cylinder heads Specifications: 

•  
• Hard 355-T6 Aluminium - Race Quality.
• 3 Angle Valve Seats
• Intake Valve size: 2.02" 
• Exhaust Valve size: 1.60"
•  
• Valves:
  • Intake: 2.020" x 5.011" Long x 11/32" stem. Ferrea Part F5027-8
  • Exhaust: 1.600" x 5.011" long x 11/32" Stem. Ferrea Part F5025-8
• Intake valve seat can be cut to accommodate a 2.080" Valve diameter.
• Valve Stem Steals: .530" Viton steel jacket type
• HP Capability

  593hp @ 0.700" lift

  573hp @ 0.600" lift

  553hp @ 0.500" lift

Recommended Supporting Parts: 

• Recommended Spark Plugs: 750 reach gasketed 5/8 hex. NGK-BCPR7ES
• Recommended Intake Gaskets: Felpro 1205 std Port or Felpro 1206 for Ported
• Recommended Guide Plates: Comp Cams 4835-8 / DRP-4835-GP

 

Flow Figures*:         

Lift          Intake          Exhaust

200          141             98

300          197             126

400          241             154

450          259             165   

500          269             174    553hp

550          272             182    

600          278             188    573hp

650          284             192   

700          288             197    593hp

* Flown on a Superflow 600 with a 4.030" Bore and a 30° back cut to the intake valve. No pipe on the exhaust.

*Output will be determined by your combination and quality of the motor build.           

We can assemble using Ferrea Valves and Comp Cams Hardware. 

Have confidence and pride these are quality items Hand Assembled right here in Melbourne Australia.

Exceptional Quality for a Wow factor of a price! 

*See the photo of the internal cast quality. We cut a cylinder head in half to verify the thickness and quality. These castings are exceptional quality. 

These Cylinder heads flow and work like you wont believe. Best Bang for your Buck! 

Dont waste your time or money on rebuilding old Cast Iron units - upgrade now. Forget the headaches, poor valve seats and crack testing woes.