JHM Lightweight Crank Pulley for B6/B7 S4 or C5 allroad w Chain 4.2L (40v)
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ABOUT THE PRODUCT
Reducing the rotating mass of parts in or attached to the engine free up horsepower. This mod is not a drastic HP increase but it is a great piece of the puzzle coupled with many of our other parts to help maximize your naturally aspirated V8. INSTALLATION NOTES
When doing this mod it is a great time to replace your drive belt. We sell these as well here in this section. Also 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 this mod is great to do when doing a Apikol snub mount that we sell as well since it requires removal of the bumper to gain access to the pulley bolts. Also note that one bolt hole has a dowel in the stock pulley and must be removed and inserted into the JHM pulley. Then it can only go on one way. Torque all bolts to 20 ft lbs in a star pattern and we also recommend using loctite.
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|Audi||S4||B6 (2003-2005)||4.2l V8 40v|
|Audi||S4||B7 (2005.5-2009)||4.2l V8 40v|
|Audi||allroad||C5 (2001-2005)||4.2l V8 40v|
- Well myself just installed this with the automatic belt tensioner, FI exhaust and jhm piggies. Myself knew there would be a great improvement but it was Awesome!!!! The s4 is an amazing car, but this was like getting your first slice of cherry pie ( and not the oven baked Cherry pie!! Hahaha) Adding this will have no ill affect if properly installed and now myself needs a pair of diapers cause of how wet myself is! Hahaha Geg this mod and anything Jhm makes for audi, they test countless hours on their products and would bot sell a half ass product!! Awesome mod for a great price, a must to add to your Jhm collection of upgraded better parts. (Posted on 8/28/2017)
- Huge difference in the weight and clearly the car feels more faster in the low RPM's.It is a good jump for the money. (Posted on 8/30/2012)
- This is a great little part that will help in the long run. The weight difference between the stock unit is very noticeable, and the quality is top notch. It really helps the car get through the rev range faster and is definitely worth the purchase. (Posted on 8/5/2011)
- Excellent part, really helps the motor start spinning off idle. Makes a subtle but noticeable difference all the way through the power band. (Posted on 3/8/2010)
Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.
Learn More: www.p65warnings.ca.gov
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