Performance Valvetrain

PAC Racing Springs PAC-S101-16 valve spring retainers. Features inside design, 0.060 in thick, 1.550 in OD, 0.575 in ID, 0.855 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S183-16 valve spring shims. Features 0.030 in thick, 1.040 in OD, 0.575 in ID, steel, set of 16, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-KS92 valve spring shim kit. Features 0.015/0.020/0.030/0.050 in thick shims, 1.500 in OD, 0.645 in ID, steel, 64 pieces, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-R501-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.185 in/0.865 in/0.635 in OD steps, triple spring compatible, titanium, set of 16, ideal for performance builds.

Dart 32160321 cylinder sleeve for Big Block Chevy. Features a 4.600in bore, 6.770in height, 4.740in OD, 0.185in wall, 10.200in deck, made from iron, designed for racing builds to repair or reinforce cylinders. Enhances durability in high-performance BBC...

Dart 32110213 cylinder sleeve for Small Block Chevy. Features a 4.125in bore, 5.625in height, 4.320in OD, 0.185in wall, 9.025in deck, made from iron, designed for racing builds to repair or reinforce cylinders. Enhances durability in high-performance SBC...

Dart 32110221 cylinder sleeve for Small Block Chevy. Features a 4.125in bore, 5.925in height, 4.300in OD, 0.185in wall, 9.325in deck, made from iron, designed for racing builds to repair or reinforce cylinders. Enhances durability in high-performance SBC...

Dart 32110211 cylinder sleeve for Small Block Chevy. Features a 4.125in bore, 5.625in height, 4.300in OD, 0.185in wall, 9.025in deck, made from iron, designed for racing builds to repair or reinforce cylinders. Enhances durability in high-performance SBC...

Dart 28111000 cylinder head parts kit for Small Block Chevy. Includes 2.02in/1.60in stainless valves, 1.250in springs, retainers, locks, studs, guideplates, and seals, designed for racing builds to assemble a high-performance head. Enhances airflow in...

Dart 28212000 cylinder head parts kit for Small Block Chevy. Includes 2.05in/1.60in stainless valves, 1.437in dual springs, retainers, locks, studs, guideplates, and seals, designed for racing builds to assemble a high-performance head. Enhances airflow...

Dart 27001410 pushrod guide plate for Small Block Chevy and Small Block Ford. Features a 5/16in pushrod slot, flat adjustable design, made from steel with a black oxide finish, designed for racing builds to ensure proper pushrod alignment. Enhances...

Dart 27001230-4 pushrod guide plates for Big Block Chevy. Features a 3/8in pushrod slot, raised adjustable design, made from steel with a black oxide finish, designed for racing builds to ensure proper pushrod alignment. Enhances durability in...