Brian Crower Lightweight Crankshaft

Part #: BC5321LW

Overview

The Brian Crower Lightweight Crankshaft is a high-performance engine component designed specifically for BMW 340i and 440i models. Crafted from premium 4340 billet steel, this crankshaft features a 100mm stroke, offering a significant upgrade in durability and responsiveness for enthusiasts seeking to enhance their vehicle’s performance. Whether you're building a high-horsepower street machine or a track-ready setup, this crankshaft provides the strength and reliability needed for demanding applications. Its lightweight design reduces rotating mass, contributing to improved throttle response and engine efficiency, making it an ideal choice for those aiming to maximize engine performance and longevity.

Key Features

This crankshaft is engineered with precision and quality in mind, incorporating several key features:

• Constructed from high-grade 4340 billet steel for exceptional strength and durability
• Lightweight design reduces rotational inertia for quicker engine response
• Precisely machined on state-of-the-art CNC grinders to ensure tight tolerances within .02mm
• Designed to support high-performance builds and increased horsepower output
• Compatible with OEM and aftermarket engine components for versatile upgrades
• Prototyped and dyno-tested to verify performance gains and reliability
• Passes strict quality control standards for consistent performance

Construction & Design

The crankshaft’s billet construction ensures maximum strength and resistance to fatigue under high-stress conditions. Its lightweight profile is achieved through meticulous machining, optimizing weight without compromising structural integrity. The precision grinding process guarantees a perfect balance and smooth operation, essential for high-revving engines and performance tuning.

Driving Feel & Feedback

This lightweight crankshaft enhances engine responsiveness, providing a more immediate throttle feel and smoother acceleration. Its robust design supports high RPM operation, offering improved engine stability and reduced vibrations during aggressive driving or racing conditions.

Installation & Fitment

Installation requires standard engine disassembly procedures and should be performed by qualified technicians familiar with BMW engine internals. Compatibility should be verified against your specific vehicle model and engine configuration to ensure proper fitment.

What’s Included

The package includes the lightweight billet crankshaft ready for installation, with all necessary hardware and mounting components compatible with BMW 340i/440i engines.