Hydraulic Camshaft and Lifters
Aluminum Dual Plane Intake Manifold
Double Roller Timing Chain and Gears
Fully Assembled Aluminum Cylinder Heads, P/N 300-552-1
Hardened Push Rods
ARP Cylinder Head Bolts
Intake Valve Gross Lift/Duration: .490in/290°
Exhaust Valve Gross Lift/Duration: .490in/297°
Intake Valve Duration @ .050in: 235°
Exhaust Valve Duration @ .050in: 240°
Rocker Arm Ratio: 1.5
Intake Valve Lobe Centerline: 107°
Lobe Separation: 112°
The kit comes with flat tappet, quick bleed hydraulic lifters that are designed to work fast and live with the higher stresses of a high performance engine.
The push rods included with the SysteMAX II kit are 8.040in length and specially hardened to withstand severe usage.
An aluminum, dual plane, high-rise design configured to make excellent power from just off-idle to 6500 RPM, the rev limit of the SysteMAX II package. The runner cross-section is large and smooth-flowing to allow an unobstructed flow of the air/fuel mixture from the carburetor to the intake valves. Special care was taken to ensure that the manifold's flow characteristics closely matched that of the SysteMAX II package to provide maximum performance. The MAXimum Performance kit manifold has no EGR provision. Manifold has a square carburetor mounting flange.
Timing Chain & Gears
The double roller timing chain and gears provide for more consistently precise timing and, therefore, power.
Holley aluminum (356-T6) cylinder heads are light in weight and offer heavy-duty performance. The intake and exhaust runners are configured to optimize breathing and the large, three-angle valves provide excellent intake and exhaust flow. The combustion chambers are performance designs engineered to deliver optimum power from every combustion stroke. Heavy-duty valve springs and rocker arms insure high RPM reliability and performance.
SysteMAX II Recommendations (parts not included)
Chevrolet 350 CID short block
10.0:1 Compression Ratio
Forged Steel Crankshaft
Lunati Rods, P/N LAH1
Lunati Flat Top Pistons, P/N 13H1J250
Speed Pro Rings, File Fit
Holley testing was conducted with a 750 CFM vacuum secondary carburetor, P/N 0-4779S. A good set of 1-3/4in tube headers, used in conjunction with some high-flow/low-back-pressure mufflers is definitely recommended. If you're running a beefed-up TH-350 automatic transmission then a 3,000+ RPM stall converter will help lower drag strip times. If you're running a TH-700R4 automatic transmission, a 2,500+ RPM stall converter will perform best. For all-around great street/strip performance a rear axle ratio of around 3.55 should be used. A set of Lunati, P/N 84146, roller rocker arms is also recommended. New, top quality gaskets for your specific application are required separately and are not part of the package.