After years of running this setup on their in-house B8 RS5 the JHM Supercharger Kits for proof of concept - not to mention the tens of thousands of additional miles put on the conversion kit by all JHM Supercharger Kit customers - we are finally ready to offer the 6-Rib Alternator Belt Upgrade and Conversion Kit to ALL B8 RS4 and RS5 owners!

The biggest advantage to upgrading your OEM Alternator Belt and Pulley setup to a JHM 6-Rib setup is the added longevity, durability, and robustness that you get from increasing the width of and adding an extra rib to the belt. On top of all this, the lips on the JHM 6-rib Pulleys are almost 3 times taller than stock! This will make it virtually impossible for you to throw a belt - no matter how hard you drive it! The extra rib increases the grip the belt has on the pulleys without increasing - or even decreasing - the overall tension of the belt. This translates to a LESS belt slip with the same tension. The taller ribs will practically bulletproof your pulley setup by keeping the belt from coming off for just about ANY reason since these pulleys were purpose-built for the JHM Supercharger kit. When we upgraded to a 6-rib belt and pulley setup, we were already ahead of OEM Audi engineers. They also upgraded the belt setup on the 3.0T Supercharged V6 to a 6-rib setup as well! Makes you wonder about the 5-rib-based Supercharger kits out there and how much abuse or boost they can really handle.

In addition to the increases in strength and durability, this 6-rib setup with also give you major weight savings over your stock pulley setup. With a naturally aspirated motor, anything you can do to reduce the weight that the rotating assembly has to push will reduce the load on the motor and free up power. Compared to the stock components, the JHM Lightweight, 6-rib Crank, and Alternator Pulleys shed over 7 pounds off of your stock rotating assembly. That's a weight savings of over 70%!!!

JHM 6-Rib Lightweight Pulley Weights versus OEM Pulley Weights:
- B8 RS5 OEM Crank Pulley: 8.6 lbs
- B8 RS5 OEM Alternator Pulley: 1.2 lbs
- Total weight: 9.8 lbs
- JHM B8 RS5 6-Rib, Lightweight Crank Pulley: 2.3 lbs
- JHM B8 RS5 6-Rib, Lightweight Alternator Pulley: 0.6 lbs
- Total weight, JHM 6-Rib, Lightweight Setup: 2.9 lbs

TOTAL WEIGHT SAVINGS:
- JHM 6-Rib, Lightweight versus OEM B8 RS4 and RS5 Setup: 6.9 lbs or over a 70% weight reduction!!!

Lastly, purchasing this kit puts you one step further along on the upgrade path to the JHM Supercharger Kit. This 6-Rib Lightweight Crank Pulley and Alternator Pulley will be used in all stages of the JHM Supercharger Kit. So, when you're ready to upgrade to the JHM Supercharger kit, we'll give you a $500 credit off of your order since you already have these parts on your B8 RS4 and RS5!

INCLUDES:
- 1x JHM 6-Rib Lightweight Crank Pulley
- 1x JHM 6-Rib Lightweight Alternator Pulley
- 1x Gates 6-Rib Belt (High quality, made in the USA)
- 1x HD 6-Rib Tensioner Pulley (OEM Idler Pulley gets removed)
- 1x JHM B8 RS4 and RS5 Tensioner Spacer Bushing Kit (includes hardware)
- 8x Crank Pulley Bolts
- 2x Tensioner Bolts - Longer than stock to accommodate Spacer Kit
- 2 x 17mm ID washers. (1 to go behind the ladder pulley as per the instructions and 1 to go under the stock alternator nut for newer cars when the nut bottoms out before the pulley gets tight.)

INSTALLATION NOTES: NOTE: These are from a B7 RS4 which installs identically
- One bolt hole on your stock crank pulley has a dowel in it that must be removed and inserted into the JHM pulley. Once this dowel is installed in the JHM 6-Rib, Lightweight Crank Pulley, the pulley can only be installed in one way. Torque all of the crank pulley bolts to 18 ft-lbs in a star pattern. We also recommend applying Loctite to these bolts.
- In order to install this kit, you will need to either put the car in "service position" or completely remove the "front clip" of the car.