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There are many things that effect vacuum. Camshaft lobe separation, lifter style, intake manifold, piston rings, compression ratio and overall valve and engine condition. Due to many and varied engine combinations, Speedway Motors offers no warranty on camshaft and or lifters for either performance, vacuum or longevity.
Speedway introduces forged rotating assemblies, with an optional balance job. Includes new 2-pc rear main seal crank, rods and pistons. Cranks are new so they use standard size bearings.
All balancing is done with our state-of-the-art "hines" balancer by race mechanics with over 30 years of experience! A kit purchased with the optional balance job will ship in 24-48 hours.
These rotating assemblies are designed for street use and include Keith Black forged pistons, Scat 4340 Pro-Comp I-beam rods and a Scat 4340 forged crankshaft.
These rotating assemblies are designed for street use and include Keith Black Hypereutectic pistons, Speedway 5140 I-beam rods and a Speedway Cast Steel crankshaft.Rings and bearings not included. Journals are standard size.Must use Clevite H-series bearings or equivalent.
These rotating assemblies are designed for either street or race use and include Keith Black Hypereutectic pistons, I-beam or H-beam rods, and a Scat Cast Steel crankshaft.
Get premium components at a superior valuewith this forged rotating assembly, only from Speedway Motors! These stroker kitsinclude a forged crank, H-beam rods, hypereutectic pistons, rod bearings, and main bearings.
5/16" stock type push rods are available in oversizes. Not for use with guide plates.Set of 16.
With ARP 7/16" cap screws, these Scat forged H-beam rods are the "bad boy" of all Scat rods available for serious horsepower engines.
These Scat Pro Comp 4340 forged bushed I-beam connecting rods come with huge 7/16" ARP cap screw bolts, which greatlyincrease strength and horsepower capabilities. In fact, Pro Comp series rods include some strength adders found in H-beam designs:
These5140 forged steel claimer I-beam connecting rods for small block Chevys are heat treated, shot peened and magnafluxed for maximum durability. They are suitable for engines producing up to 500 HP. Features heavy duty 3/8" cap screws.
Save money by welding and assembling your own headers! These small block Chevy header kits will work for many racing and rodding applications. It includes everything you need to assemble a pair of high-quality headers: eight mandrel-bent primary tubes, two pre-formed collectors, two extra-thick standard-port flanges, two gaskets, and 12 header bolts.
Choose Gilmer or HTD style belt.
91303801Overall Length1.250" (1 1/4")Under Head Length1.000"Thread Pitch3/8"-16Wrench TypeHexWrench Size9/16"Material TypeSteelFinishChromeSold in QuantitySetNotesIt is highly suggested that the threads be chased and then anti sieze be used when installing.
Heavy gauge steel, S/B Chevy oil pan kit can be used for building any racing pan. Claimer pan kit includes bottom, side, 2 gate assemblies, and drain plug. Bare oil pan sold separately.