Callies Compstar LS Crankshaft

Callies Compstar LS Crankshaft

When your Gen III/IV LS build needs a rock-solid bottom end, the Compstar delivers strength, balance, and affordability. Engineered from premium forgings and finished to tight tolerances, it’s a proven choice for serious street/strip and bracket combinations.

Specs & Features

-Stroke: 3.625" to 4.125" – common foundation for 346–454ci LS combos

-Platform: LS (Gen III/IV), wet-sump series with 8 counterweights for improved bearing load distribution

-Journals: 2.559" mains / 2.100" rods; minimum 6.125" rod length

-Material & Finish: 4340 forged steel, deep nitride-hardened, micropolished journals for long life and smooth bearing surfaces

-Balance: Internal balance for stable high-RPM operation

-Bobweight Prep: Compstar LS cranks are counterweight-prepped to ~1850 g bobweight

-Reluctor Options: 24X or 58X

Why Builders Choose It
Compstar’s LS forgings are designed for strength-to-weight efficiency and consistent balance characteristics, making them a reliable choice for NA, nitrous, or moderate boost builds that live in the RPM

Siebert Performance Tip: Pair this crank with Compstar rods and quality Wiseco forged pistons for a rotating assembly that's proven to win.