SMALL-BLOCK ROCKER ARMS AND COMPONENTS
12495490
ROCKER ARM KIT, STEEL, 1.5 RATIO (SET OF 16)
- Self-aligning, high-quality rockers have a nominal 1.5:1 ratio
- Includes 16 stamped steel rockers with pivot balls and nuts
- Use P/N 10089648 for single service part; for 3/8" studs
- Not recommended for mechanical lifter camshafts
19210728
ALUMINUM ROLLER ROCKER ARM SET, 1.5:1 RATIO
- Resemble the ones used in the 1996 Corvette LT4 engine
- Trunnions have been machined to fit early model 3/8" rocker studs
- Will accommodate up to 0.575" valve lift
- Set of 16, 3/8˝ stud 1.5:1 ratio roller rockers
- Use P/N 19210724 for single service part
NOTE: When using a high-lift camshaft, check valve spring coil bind, retainer-to-seal clearance, and piston-to-valve clearance. Check for adequate pushrod clearance when using on cast-iron heads. It may be necessary to remove valve cover drippers for proper rocker arm clearance.
19210729
ALUMINUM ROLLER ROCKER ARM SET, 1.6:1 RATIO
- Resemble the ones used in the 1996 Corvette LT4 engine
- Trunnions have been machined to fit early model 3/8" rocker studs
- Will accommodate up to 0.575" valve lift
- Set of 16 3/8" stud 1.6:1 ratio roller rockers
- Use P/N 19210725 for single service part
NOTE: When using a high-lift camshaft, check valve spring coil bind, retainer-to-seal clearance, and piston-to-valve clearance. Check for adequate pushrod clearance when using on cast-iron heads. It may be necessary to remove valve cover drippers for proper rocker arm clearance. P/N 19210729 cannot be used on ZZ3 engines with orange valve springs.
19210725
ADJUSTER NUT FOR ROLLER ROCKER ARM
- 3/8" adjustment nut
- Used on both aluminum rocker arm kits P/N 12370838 and P/N 12370839
19210731
“KOOL NUT” (SINGLE)
- These special rocker arm nuts are used on GM Circle Track engine P/N 19258602, 88958602
- Can be used with any stamped-steel rocker arm
VISIT OUR BRANDS FOR YOUR OE NEEDS
