Site Wide Sale
Est. 1974
Shop by Car
Mini Cooper Crank Pulley Lightweight R52 R53 Cooper S Upgrade

Mini Cooper Crank Pulley Lightweight R52 R53 Cooper S Upgrade

Mini Cooper Crank Pulley Lightweight R52 R53 Cooper S Upgrade
This Lightweight Crankshaft Pulley is stock diameter (OEM sized) crank pulley, utilizing the original belt layout. Since the crank pulley diameter is unchanged, they maintain alternator output at exactly stock output levels so you need not worry about flat batteries or weak charging capabilities. Through extensive weight savings afforded by 6061 aircraft aluminum construction, power gains of up to 10% are available depending on how your MINI is set up. CravenSpeed crank pulleys come fully balanced and counter-weighted, and feature anodizing for superb wear resistance & strength.


2002-2006 R53 MINI Cooper S Hatchback
2005-2008 R52 MINI Cooper S Convertible

For the 2% Oversized pulley, see NME5039.

NOT compatible with Cooper (non-S) models.

Releasing Power

The rule of thumb is that each pound of weight taken off the engines rotating assembly is worth approximately 2.7HP. The concept is that the crank is a parasite; it does not put power to the drivetrain but still requires the energy produced by the engine to rotate. When you reduce this parasitic weight, you release power that was previously used only for spinning the supercharger and alternator.

Is this crank pulley safe?

The pulleys on the R53's 1.6 and most new smaller engines have an elastomer (rubber ring) incorporated into the pulley that looks similar to a harmonic damper. The elastomer in the OEM pulley serves as an isolator, which is there to suppress natural vibration and noise from the engine itself, the A/C compressor, P/S pump, and alternator. The purpose of a traditional harmonic damper is to protect against crank failure from torsional movement. This is not necessary in the MINI or most modern engines because of the many advances in engine design and materials. Factors such as stroke, displacement, inline, V configurations, power output, etc., do determine when and how these harmonics and torsional movements occur.

Tools for removing and installing the pulley can be found below:
NME5031 Crank Pulley wrench
NME5032 Crank Pulley Removal Tool
NME5033 Pulley installer tool

For the MINI Factory Vibration Damper replacement, see NME7647.

For a lightweight Harmonic Damper Upgrade, see NME5075.

For the Fluid Filled Harmonic Damper upgrade, see NME5080.

For the factory replacement Bolt for the crank pulley, see NME7649.

Customer Reviews:
( 1)
5 out of 5 stars
Share your thoughts with other customers
Most Helpful Customer Reviews
Lightweight Crankshaft Pulley Damper NME5038
My Crank Damper came apart at 123 thousand miles. Replaced it with this lightweight unit. Very Nice and you can feel the differents in how smoother the engine is. A little more HP I do believe. You need the tools to get it off though.
Was this review helpful to you?  Yes   No

Recently Viewed Items