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What's New

Strut Mount, Street Density, MkVII Volkswagen Golf/GTI/R & 8V/8S Audi A3/S3/TT/TTS (MQB)
$49.75
Specials

JHM K04-R Turbo for B7-A4 B8 A4-A5 2.0T
$1,895.00
$1,695.00

JHM 6-Rib Alternator Belt Conversion Kit for B8-S5 w 4.2L FSI (32v)
[JHM-B8S56Rib]

$600.00 $540.00

PROUDLY MADE IN THE U.S.A

Introducing the JHM 6-Rib Alternator Belt Upgrade and Conversion Kit for the B8-S5 4.2L!!!

After years of running this setup on our in-house B8-S5 4.2L 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-S5 4.2L owners!


ABOUT THE PRODUCT:
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%!!!

Click to enlarge picture

Click to enlarge picture

Click to enlarge picture

JHM 6-Rib Lightweight Pulley Weights versus OEM Pulley Weights:
- B8-S5 4.2L OEM Crank Pulley: 7.0 lbs
- B8-S5 4.2L OEM Alternator Pulley: 1.9 lbs
- Total weight: 9.7 lbs
- JHM B8-S5 4.2L 6-Rib, Lightweight Crank Pulley: 2.3 lbs
- JHM B8-S5 4.2L 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-S5 4.2L Setup: 6.8 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-S5 4.2L!

INCLUDES:
- 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 Idler Pulley (replaces OEM Idler Pulley)
- 1x JHM B8-S5 4.2L Tensioner Spacer Bushing Kit (includes hardware)
- 8x Crank Pulley Bolts
- 2x Tensioner Bolts - Longer than stock to accommodate Spacer Kit
- 1x Shoulder Bolt for Tensioner adjustment lockdown

INSTALLATION NOTES:
- The B7-RS4 has a similar installation procedure. To view them, 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.

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Fitment:
Note: JHM works hard to make all fitment charts as accurate as possible please read the product description to make sure this is correct for your vehicle.
Make Model - Chassis Engine
AudiS5 - B8-B8.5 (2008-2017)4.2l V8 32v FSI
This product was added to our catalog on Thursday 08 May, 2014.
Quantity:


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Exhaust - Race Pipes - Stainless Steel, 2.5" (JHM) for B8-S5 4.2L FSI (32v)

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Copyright © 2017 JH Motorsports

JH Motorsports is not affiliated with or endorsed by Audi AG, Audi of America, Volkswagen AG, or Volkswagen of American or any other car company mentioned or whose logos are displayed in these web pages or our store. Audi®, Quattro®, Avant®, A4®, S4®, A6®, RS4®, RS6®, Allroad®, TT®, and Tiptronic® are trademarks of Audi AG. Volkswagen®, VW®, Golf®, Jetta®, Passat® and Beetle® are trademarks of Volkswagen AG. While we try to keep everything current, JH Motorsports is not responsible for errors in pricing on this web site. All prices are in US Dollars.

Some of these modifications and or parts are intended for off-road use only and may violate Federal or your State emissions standards. Also, end user assumes all risk with product performance and installation. JH Motorsports is not responsible for any bodily or mechanical harm, etc. as a result of use or misuse of any products.