Both heads with rocker arms and push rods in place.

Competition Cams 7812-16 High Energy Pushrods for Small Block Chevy, 5/16" Diameter, 7.794" Length


Smith Bros. Pushrods | Redmond Oregon

Eliminate worn, sloppy linkage with these heavy duty clutch rod sets! This stout, 9/16" diameter aluminum pushrods feature self-lubricating teflon-lined spherical end links that won't rattle or squeak. This unique design...

Most F1 cars now use push rods. The high nose makes it almost impossible to locate a rocker low enough in the chassis and still have the right geometry. Minardi and Arrows used pull rods with low noses to lower the centre of gravity. These two teams are a last two to use this concept.

We’ve been crafting custom pushrods since 1953

Series 4 - Medium to High Performance - 4130/4135 Hard Drawn
PART#Straight PushrodsGuide Plate Use
4015/16 x .083 Wall
401-1185/16 x .118 Wall
40211/32 x .120 Wall
4043/8 x .095 Wall
404-1203/8 x .120 Wall
404-1453/8 x .145 Wall
4057/16 x .120 Wall
405-1687/16 x .168 Wall

Pushrods - Pushrod Length Checker | JEGS

Pull rods were first brought to Formula 1 by Gordon Murray with Brabham in the 70s but now all formula one teams make use of the push rods, as pull rods are quite hard to implement in a car. The advantages of a pull rod lie in the possibility to make the nose lower, assemble most parts lower to the ground and thus lowering the height of the .

Bore: 4.065-inch
Stroke: 4.200-inch
Displacement 426 cubic inches
Compression ratio: 12.0:1
Camshaft: custom COMP Cams solid roller
Valve lift: 0.633-/0.640-inch
Duration: 242/246-degrees at 0.050
Lobe separation angle: 105 degrees
Cam installed centerline: 105 degrees
Rocker and ratio: stock Chrysler, 1.50/1.50:1 shaft-mount
Lifters: COMP solid roller
Pushrods: Smith Bros.
Piston rings: Total Seal 1.1-mm, 1.1-mm, 2.0-mm
Piston: Ross forged aluminum
Block: stock LA-series iron
Crankshaft: custom Eagle billet, offset ground mains
Rods: Lentz 6.400-inch steel
Main journal diameter: 2.300-inch with spacers
Rod journal diameter: 2.375-inch
Bearings: Clevite H-series
Cylinder head: Radically reworked and ported factory iron castings
Intake port flow: 275 cfm at 0.600-inch lift
Exhaust port flow: 180 cfm at 0.600-inch lift
Chamber volume: 105-cc
Intake valve diameter: 2.05-inch
Exhaust valve diameter: 1.60-inch
Valvesprings COMP Cams single beehive (160 lbs seat, 350 lbs open)
Spring retainers: COMP Cams moly steel
Head gasket: FelPro 0.041 plus O-rings in block
Intake manifold: Edelbrock LS1 GM Victor Jr.
Carburetor: Holley 880-cfm by C&S Specialties
Header: Schoenfeld 1-3/4 inch Ford small-block sprint car headers with Poly
flange plates
Ignition: MSD billet distributor
Damper: Professional Products
Water pump: Moroso
Oil pan: Moroso
Oil pump: Melling
Timing advance: 30 degrees