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JHM Lightweight 6-Rib Crank Pulley and Alternator Belt Conversion Kit for B8-RS4-RS5 w 4.2L FSI (32v)



Sale Price $399.46


Introducing the JHM 6-Rib Alternator Belt Upgrade and Conversion Kit for the B8 RS4 and RS5!!!

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

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Audi 6/Rib Alternator Belt Conversion Kit, B7/RS4

The biggest advantage to upgrading your OEM Alternator Belt and Pulley setup to our 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 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 load on the motor and free up power. Compared to the stock components, our 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%!!!

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Audi JHM 6-Rib Alternator Belt Conversion Kit, Version 3

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Audi JHM 6-Rib Alternator Belt Conversion Kit, Version 2

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Audi JHM 6-Rib Alternator Belt Conversion Kit, Version 4

JHM 6-Rib Lightweight Pulley Weights versus OEM Pulley Weights:
- B8 RS4 and RS5 OEM Crank Pulley: 8.6 lbs
- B8 RS4 and RS5 OEM Alternator Pulley: 1.2 lbs
- Total weight: 9.8 lbs
- JHM B8 RS4 and RS5 6-Rib, Lightweight Crank Pulley: 2.3 lbs
- JHM B8 RS4 and RS5 6-Rib, Lightweight Alternator Pulley: 0.6 lbs
- Total weight, JHM 6-Rib, Lightweight Setup: 2.9 lbs

- 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 our 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!

- 1x JHM 6-Rib Lightweight Crank Pulley
- 1x JHM 6-Rib Lightweight Alternator Pulley
- 1x Gates 6-Rib Belt (High quality, made in 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 ldler 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
- For a set of labeled pictures detailing the installation of this kit, please click HERE
- 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.

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This product fits the following vehicles:
Make Model Chassis Engine
Audi RS4 B8-B8.5 (2012-2015) 4.2l V8 32v FSI
Audi RS5 B8-B8.5 (2011-2015) 4.2l V8 32v FSI
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Off-road Use

By Purchasing any Off-Road use ONLY products from JH Motorsports, Inc. I acknowledge and understand the following disclosure. (This notice is located at the bottom of the page description of affected products on our website.)

Vehicle Code § 27156:
(b) No person shall operate or leave standing upon a highway a motor vehicle that is required to be equipped with a motor vehicle pollution control device under Part 5 (commencing with Section 43000) of Division 26 of the Health and Safety Code or any other certified motor vehicle pollution control device required by any other state law or any rule or regulation adopted pursuant to that law, or required to be equipped with a motor vehicle pollution control device pursuant to the National Emission Standards Act (42 U.S.C. Secs. 7521 to 7550, inclusive) and the standards and regulations adopted pursuant to that federal act, unless the motor vehicle is equipped with the required motor vehicle pollution control device that is correctly installed and in operating condition. No person shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise any device, apparatus, or mechanism intended for use with, or as a part of, a required motor vehicle pollution control device or system that alters or modifies the original design or performance of the motor vehicle pollution control device or system.

Health and Safety Code § 43000:
43001. The provisions of this part shall not apply to:
(a) Racing vehicles.

As the aforementioned code sections outline, it is against the law to operate or use a vehicle on public streets or highways with modified, altered, or disconnected motor vehicle pollution control devices. This may include but is not limited to, Evaporative Fuel Controls, Catalysts, DPF, PTOX, PCV Systems, Exhaust Gas Recirculation Systems, Oxygen Sensors, Thermostatic Air Cleaners, Air Intake Systems, Fuel Injectors, Regulators, Adjustable Cam Gears, ECU Programming, Mapping, or other Computer Modifications. Air Pumps, Air Injection, Timing, and any other Emission System Modification(s).

Purchaser acknowledges and certifies to JH Motorsports Inc., that Purchasers vehicle will only be used for racing applications or off road vehicle use only. Purchaser requests these modifications for the purpose of enhancing the vehicle for competitive Racing Applications and will not use this vehicle on public streets or highways. Purchaser agrees to indemnify JH Motorsports Inc., all employees, officers, owners, and subsidiaries for any civil or criminal liability arising out of use of Purchasers vehicle on public streets or highways as Purchaser has been duly notified of the laws and regulations regarding disconnecting, alteration, or modification of a vehicle’s pollution control devices. Purchaser understands and has been advised the driving of a vehicle on public streets or highways could result in criminal or civil penalties.

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Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

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