Pair Small Block Chevy 350 Cylinder heads, Complete Assembled for Hydraulic Roller Cam, Angle Plug

DRP Cylinder Heads – Small Block Chevy 350 – Assembled to suit Hydraulic Roller.

Angle Plug Heads. These heads flow 530hp @ 0.550" lift

Hand assembled in Australia using PAC valve springs, Comp Cams hardware and Ferrea Valves.

High quality Chevy 350 Cylinder heads that perform out of the box! High Torque/Velocity inlet runners that flow 500hp @ .450" lift and super crisp on the throttle. These cylinder heads are manufactured with a permanent mold casting for optimal repeatability and quality. The Internal Cast quality has super Smooth Water Jackets for maximum flow, cooling and detonation prevention. Optimal Spark Plug position. The copies don’t have this location.

Heads: Chev 23° DRP-200A Aluminium Cylinder heads

Runner Volume: 196cc Intake runner volume + 75cc Exhaust

Chamber size: 64cc (these heads can be milled down to 60cc)

Valve Guides: Premium Bronze Valve Guides. 0.570" OD 

Valve Stem Seal size:  0.530" x 11/32

Material: Hard 355-T6 Aluminium - Race Quality.

Valve Seats: 3 Angle Valve Seats

Intake Valve size: 2.02" 

Exhaust Valve size: 1.60"

Recommended Spark Plugs: 750 reach gasketed 5/8 hex. NGK-BCPR7ES

Recommended Intake Gaskets: Felpro 1205 std Port or Felpro 1206 for Ported

Recommended Adjustable Guide Plates: DRP-4835-8

Temp Sender Size: 3/8" NPT

Flow Figures*:          

Lift          Intake          Exhaust

200          145             106

300          192             135

400          232             160

450          242             168   503hp

500          250             178   

550          257             179   530hp

600          261             181   537hp

650          260             187   

700          255             190

* Flown on a Superflow 600 with a 4.030" Bore and a 30° back cut to the intake valve. 

REQUIRES:

Adjustable guide plates - see listing part # 4835-8 Comp Cams

Rocker Studs -  see listing part # 4512-16 Comp Cams

Please allow 5 days to assemble the heads. * If you need these sooner, just ask.

* Results will vary depending on your build and combination of other items. 

This Dyno test was carried out with a Solid Flat Tappet Camshaft,255/256 Duration and 0.540/0.534" valve lift with a 106 LSA. 1 3/4 Headers, Electrical Water pump, Edelbrock Victor Jnr Single plane intake (we feel you will achieve similar results with an air gap dual plane. 11:1 Compression with a domed Piston. 34° total timing.

• 350 CHEV DYNO RUN - 500HP  https://www.youtube.com/watch?v=vpwIgJIN5X8
• 383 CHEV DYNO RUN - LOW COMP 95 OCTANE  https://www.youtube.com/watch?v=iAEie9M4fz8