Enhance the performance of your Mini with the ALTA Lightened Crank Pulley (LCP), engineered to increase horsepower and torque. Available in 0% Stock Sized and +2% Oversized options, this pulley is crafted from 6061T6 aluminum, weighing only 0.65 lbs. Significantly lighter than the stock crank pulley, the ALTA LCP ensures improved engine efficiency without adding vibration or noise. The +2% Oversized pulley provides additional boost for Supercharged Cooper S models, delivering safe and reliable performance. With increased belt contact, this pulley reduces wear and enhances durability, making it a must-have upgrade for Mini enthusiasts.

• Increases horsepower and torque
• Lightweight 6061T6 aluminum construction
• Available in 0% Stock Sized and +2% Oversized options
• Does not affect charging system
• Improves engine efficiency and performance

MINI R52 R53 Adjustable Tensioner Stop - Black

Upgrade your Mini's engine with the MINI R52 R53 Adjustable Tensioner Stop - Black. Engineered for precision and durability, this tensioner stop allows for easy adjustment of belt tension, ensuring optimal performance. Say goodbye to belt slippage and enjoy improved engine reliability with this high-quality accessory.

• Allows for easy adjustment of belt tension
• Prevents belt slippage for improved engine reliability
• Engineered for precision and durability
• Enhances performance of your Mini's engine
• Sleek black design adds a stylish touch

Ensure optimal cooling performance and extended belt life with the A/C Compressor Accessory Belt Tensioner. Engineered to deliver consistent tension, this tensioner is the key to maintaining efficient cabin cooling in your vehicle.

• Crafted with high-quality materials: Ensures durability to withstand daily driving demands.
• Precise tensioning: Prevents slippage and ensures efficient power transfer for optimal cooling performance.
• Engineered for smooth operation: Reduces vibration and noise, enhancing driving comfort.
• OEM-compatible: Provides a perfect fit and functionality.

If you are experiencing a slipping compressor belt, you may notice a loss in cabin cooling performance or a high-pitched noise emitted from the vehicle's engine bay. If you are experiencing either of these issues, it's time to replace your tensioner.

Group A racecars were the top of their class in both touring car and rally racing. Heavily modified and extremely fast these cars set out to demonstrate the best of what a manufacturer could do on the racetrack. It was the predecessor to the current DTM class racing and set a standard for many other divisions of motorsport to follow.  

One of the weaker points of the S14 engine, when speaking from a racing standpoint is the belt drive system. While fine for a street going car, a V-belt is not suitable for high RPM applications. On the track, most of your time will be spent in the higher rev range which puts extreme amounts of stress on the factory setup. BMW realised this and came up with a solution that involved doing away with the V belt system and using a 6 rib serpentine style instead.

Extremely resistant to slippage and failure this design holds up much better the abuse of track duty and won't leave you stranded and waiting for tow back to the pit. Additionally, this kit does not accommodate and a/c compressor and the alternator and waterpump are underdriven by way of slightly larger pulleys. Combined, this puts less of a load on the crankshaft which leads to more efficient power delivery to the ground. If you track you E30 M3, this is an essential upgrade and until now was extremely difficult to source. Do not skip this pivotal step in your engine build or overhaul and get a leg up on the competition the Group A way.
Please note this kit is special order and in non-returnable

Features:​

• Kit replaces all engine pulleys and crank damper
• Includes 6 rib serpentine belt
• Underdriven waterpump and alternator pulleys
• Recommended for off road and racing use only 

This kit fits the following BMWs:
1986-1992 BMW M3 All 
 

URO Drive Belt Tensioner Pulley - BMW F10 528i 528i xDrive

URO Drive Belt Tensioner Pulley - BMW F10 528i 528i xDrive is a premium replacement part designed to restore proper belt tension and alignment for smooth engine performance. Manufactured to OE specifications, this pulley ensures proper fitment and long-lasting durability, even under extreme engine conditions.

• Manufactured to OE dimensions for precise belt alignment and clearance
• High-strength alloy or composite construction resists engine heat and vibration
• Durable surface coating (on metal pulleys) resists corrosion for increased longevity
• Maintains optimal drive belt performance for consistent engine operation
• Backed by a 24-month unlimited mileage warranty

This URO Drive Belt Tensioner Pulley is the perfect solution for maintaining the drive system's efficiency and reliability in the BMW F10 528i and 528i xDrive models.