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JHM Lightweight Crank Pulley for Touareg, B8 S5, Q7, C6 A6, D3 A8 w 4.2l FSI V8

SKU: JHM-079105251N-FSI


Sale Price $250.75


Introducing the JHM 4.2L FSI 32v V8 Lightweight Crank Pulley for the B8-S5!!!

Our Lightweight Pulley is perfectly counterbalanced like stock for proper engine balancing AND it drops 5 pounds of rotating mass in the process. The pulleys are anodized BLACK so they look stock and blend in. This design has been proven on the Audi V8 on hundreds of cars since 2009.

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Audi S4 B6/B7 or C5 Allroad Lightweight Crank Pulley

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Audi S4 B6/B7 or C5 Allroad Lightweight Crank Pulley

Reducing the rotating mass of parts in or attached to the engine free up horsepower. This modification will not provide you with a drastic increase in power but it is a great piece of the naturally aspirated V8 power puzzle when coupled with our other bolt on upgrades. If you're looking for some feedback on these units, feel free to search any of the online Audi forums, specifically in the B6-B7 S4 sections where we have had many customers run these units for years!

When installing this pulley it is a great time to replace your drive belt. We sell these as well here in this section. It is important that you notice how tight your stock belt is prior to removal to gain access to the pulley. If you do not tighten it at least as tight as the stock belt was it will slip and squeal. Also note that one bolt hole has a dowel in the stock pulley and must be removed and inserted into the JHM pulley. Then the JHM Lightweight Pulley can only go on one way. Torque all bolts to 20 ft lbs in a star pattern. We also recommend using Loctite.

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This product fits the following vehicles:
Make Model Chassis Engine
Audi S5 B8-B8.5 (2008-2017) 4.2l V8 32v FSI
Audi Q7 4L (2007-2015) 4.2l V8 32v FSI
Volkswagen 2 (2008-2010) 4.2l V8 32v FSI
Audi A6 C6 (2005.5-2011) 4.2l V8 32v FSI
Audi A8 D3 (2004-2010) 4.2l V8 32v FSI
Customer Reviews (2)
A MUST for supercharged B8s especially!
I have a 2011 S5 4.2 automatic with the APR Stage III twin screw supercharger. I'm the third owner; got the car at about 68k and apparently it's had the APR kit since around 25k. It's now at almost 100k and has been rock-solid reliable as a daily driver. One of my few complaints, however, has been the "laggy" shifts from 1-2 and 2-3, especially under docile light throttle around-town "comfort mode" driving conditions. In the shift, the engine would feel like it "bogged" down for a second as the transmission shifted and tried to drag down the engine's RPMs, but the inertia of eight cylinders PLUS the added rotating mass of the supercharger really fought the shift. It's reportedly a noticeable issue with the N/A V8s, made even more pronounced by the addition of the supercharger. My engineering background indicated to me that I might want to search for ways to shed some of that rotating mass.

In searching for a solution, I came across this product, and specifically the review above from Martez. It gave me enough hope to give it a try. The ECS dual pulley youtube video was quite helpful in walking me through the process for placing the front of the vehicle in service position (an absolute must... otherwise you'll have less than an inch of clearance between the faces of the pulleys and the radiator fans)... once that was done, the rest of the install was fairly straightforward. I've been driving with the mod for a few days, and I must say, it did NOT disappoint! I haven't noticed a huge power increase or anything, but honestly wasn't expecting to (considering the car is sitting with 540+ HP already). What I did notice, however, was that the shifting has smoothed out considerably. I am probably hyper-sensitive to it, so I would notice it more than most... but even so, it is only noticeable under very specific conditions (i.e. apply part throttle from a stop, then let up just as it's shifting 1-2.. you almost have to TRY to make it lag). Considering this is not only my daily driver, but also a car my wife takes on occasion - and this shift lag was her biggest complaint - I couldn't be happier with how well the product has worked in my application.

Thanks, JHM, for another great product for our Audis!
Review by Jon B (Posted on 6/24/2019)
I can honestly say this modification is a MUST!!! Significant increase in torque and frees up horsepower. By replacing the stock pulley with the JHM crank pulley, you'll be eliminating 5lbs of rotating mass off of the motor, therefore, increasing drivability and performance. Shifts are smooth from 1st to second, no more jerking. When paired with the JHM solid shift rod and short shifter, you can't go wrong. GREAT PRODUCTS!!! Review by Martez (Posted on 4/18/2016)
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You're reviewing: JHM Lightweight Crank Pulley for Touareg, B8 S5, Q7, C6 A6, D3 A8 w 4.2l FSI V8
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.

Prop 65

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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