Proline Chevy 350 Cylinder Heads DRP ASSEMBLED HYDRAULIC ROLLER SBC Small Block (pair)

DRP Small Block Chevy 350 Cylinder Heads, Anlge Plug Type, Assembled Pair

Hydraulic Roller Spec | Ferrea Valves | DRP Proline Valve Springs by PAC Racing | Angle Plug

500HP and 460 ft-lb torque from a 350ci Small Block Chev*

*Reference dyno was run with a solid flat tappet cam — indicative of the head's potential. With the right hydraulic roller cam and supporting parts, the heads will support more.

DRP 23° Chev Aluminium Cylinder Heads — bolt-on horsepower for the Small Block Chevy 350

Performance cylinder heads usually come at a serious cost. DRP small block 350 chevy cylinder heads are easy on the budget without giving up casting quality, port flow efficiency, precision valve seats & machining. 

These are the as-cast version — ports and combustion chambers straight from the casting, no CNC work needed. The as-cast chambers are right out of the box, and keeping them as cast holds the chamber small and maintains compression.

Bolt on and go. All machined

What's included

Hand-assembled in Melbourne by Total Performance, spec'd for Perfromance Hydraulic roller camshaft applications:

• DRP cylinder head castings — 23 deg Angle Plug, high-flow ports, Super Clean Castings
• Ferrea 5000 Series valves — intake and exhaust
• DRP Proline Valve Springs by PAC Racing (full spec below)
• Comp Cams hardware — Retainers, Machined Race Locks, Spring Locators.

DRP Proline Valve Springs by PAC Racing

Made in the USA by PAC Racing Springs. Small-OD LS-style dual valve springs — polished, high-RPM capable, built for aggressive hydraulic roller cams.

Flow figures & HP potential

Reference dyno spec

The 500HP / 460 ft-lb result was achieved on a 350 SBC using:

• Solid flat tappet cam — 255/256 duration, 0.540"/0.534" lift, 106 LSA
• 1 ¾" headers, electric water pump
• Edelbrock Victor Jr single-plane intake (similar results expected with a dual-plane air-gap)
• 11:1 compression, domed pistons, 34° total timing

Also required to complete the build

These two parts are commonly missed — make sure you have them ordered:

• Adjustable guide plates — part # DRP-4835-GP
• Screw-in rocker studs — part # ARP 100-7101

Not sure on the combo? Call our engine builders on 1800351351 — we'll spec the cam, springs and supporting parts to match your build.

Watch the dyno runs

▶ 350 Chev Dyno — 500HP ▶ 383 Chev Dyno — 95 Octane

Lead time

Please allow 1 to 5 business days for assembly. Need them sooner? Give us a call & we can express.