Engine Rocker Arm

302 and 351 Windsor.

these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1803 rocker features a 1.65 ratio for use with 3/8" stud Chevrolet V6 and 265-400 Small Block.

these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1806 rocker features a 1.65 ratio for use with 7/16" stud Chevrolet V6 and 265-400 Small Block.

these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1820 rocker features a 1.7 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.

these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1817 rocker features a 1.7 ratio for use with 7/16" stud Chevrolet 265-400 Small Block.

302 and 351 Windsor.

302 and 351 Windsor.

these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1823 rocker features a 1.73 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.

351C and 429-460.

these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1828 rocker features a 1.8 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.

this Ultra-Gold ARC rocker for Chevrolet Small Block reduces valve lift by limiting the rocker ratio to 1.3. A great asset to engine builders who prefer to limit the valve lift over removing an inner spring.

the Ultra Gold ARC rocker withstands up to 700 lbs pressure while adding power and stability. This 19015 self-aligning rocker has a 1.5 ratio for 3/8" stud '88+ Chevrolet 265-400 Small Block.

the Ultra Gold ARC rocker withstands up to 700 lbs pressure while improving power and stability. This 19017 rocker features a 1.5 ratio for use with 3/8" stud '88+ Chevrolet 265-400 Small Block.

• Improvements developed through FEA analysis for an even stronger
• stiffer body without compromising mass. A new arced channel and contoured top
• similar to a bridge design
• give the rockers the best strength-to-weight ratio possible.

the Ultra Gold ARC rocker withstands up to 700 lbs pressure while adding power and stability. This self-aligning 19016 rocker has a 1.6 ratio for 3/8" stud '88+ Chevrolet 265-400 Small Block.

the Ultra Gold ARC rocker withstands up to 700 lbs pressure while improving power and stability. This 19018 rocker features a 1.6 ratio for use with 3/8" stud '88+ Chevrolet 265-400 Small Block.

the Ultra Gold ARC rocker withstands up to 700 lbs pressure while improving power and stability. This 19001 rocker features a 1.5 ratio for use with 3/8" stud Chevrolet V6 and 265-400 Small Block.