JH Motorsports
JHM Front Rotor Rings(pair) BBK 380mm - Lightweight for B7 RS4
JHM Front Rotor Rings(pair) BBK 380mm - Lightweight for B7 RS4
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Before you can continue, you must agree to all of the following terms:
The RM Series is comprised of a damper cartridge secured within a threaded outer body. This specific design requires a lubricating grease to be applied during the assembly process between the two damper and threaded body to avoid metal-to-metal contact. In order to keep the two components from touching each other and generating noise transmission you will need to periodically clean out the old grease and apply new grease.
This is a simple process that can be done with just a few common tools. It does not require you to open the internals of the dampers themselves and therefore you do not need to have the dampers re-pressurized after carrying out this procedure. Please contact us on info@mlperformance.co.uk for more information and a step-by-step guide on how to complete this maintenance.
As a result of this required maintenance, we do not recommend the RM Series for road use over the BR Series or ER Series.
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Fitting service at Xatrix, Surrey
We can offer a fitting service for this part. Contact us for a fitting quote.
PROUDLY DESIGNED AND BUILT IN THE USA
**NOTE: As of 8/1/2012, all JHM Lightweight Rotors will now feature zinc plating!!!** This high quality coating will slow the effects of corrosion on the rotor surface and will keep your rotors looking good through the winter!
IN STOCK AND READY TO SHIP AS OF 8-1-12!WHY PAY $750 TO $900 FOR A COMPLETE NEW SET OF FRONT ROTORS FOR YOUR B7 RS4 WHEN YOU CAN BUY THIS KIT AND REUSE THE ALUMINUM HAT YOUR CAR COMES WITH WHILE ALSO GAINING 15MM IN DIAMETER FOR BETTER BRAKING PERFORMANCE???Shaves 5lbs of unsprung weight from the front of your car while increasing the diameter of the rotor and braking performance, plus they bolt on just like stock! This is great alternative to replacing your complete rotor with OEM parts when your aluminum hat is reusable. You upgrade to a 15mm larger rotor for less than heavy stock replacments! We also do away with the annoying crack prone holes and sell these with quiet slots.Stock vs. JHM
-Rotor Weight: Stock = 24lbs(each), JHM = 21.5lbs(each) - 11% LIGHTER, 2.5lbs less each (5lbs total)
-Rotor Cooling Air-gap: Stock = 13mm(.512"), JHM = 18.5mm(.728") - LARGER for better cooling
-Rotor Cooling Center Fin Design: Stock = Straight Fin, JHM = Airfoil - MORE EFFICIENT for better cooling
-Rotor OD: Stock = 365mm(14.4"), JHM = 380mm(15") - 4% LARGER for better caliper leverage on the wheel
-Rotor Thickness: Stock = 34mm(1.34"), JHM = 34mm(.1.34") - SAME
-Bolt pattern: - SAME (fits on the OEM center hat just like an OEM rotor would)INCLUDES: 2 - JHM 2-piece Lightweight 380mm Big Front Rotor Rings, 20 - New HD 6mm allen bolts, 20 - New HD 6mm washers, 20 - New Self Locking (swedged) nuts - New Longer HD caliper bolts, 4 - New Stainless steel caliper shims, 4. (Each rotor weighs 2.5lbs less than stock for a total of 5lbs weight savings.) 11% lighter!ONLY AVAILABLE SLOTTED: Our slotting is quiet and not noticeable.Outer ring specs:
We worked closely with a race brake manufacturer that supplies many NASCAR racers and a couple major brake kit companies. Due to their expertise we chose to have them build us the outer rings to our specs to fit the B7 RS4.
NOTE: With the installs we have done we have found that our slot design is whisper quiet.
For JHM Rotor Break/Bed-in Procedure and Trouble shooting guide,
Please note: JH Motorsports does not recommend using EBC brake pads with our 2-piece lightweight rotors. Customer have reported and we have found EBC pads leave excessive pad deposits that can cause brake pulsation. Many EBC pads have a break in coating that reacts with the zinc plating used on our rotors
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| Make | Model | Chassis | Engine |
|---|---|---|---|
| Audi | RS4 | B7 (2006-2009) | 4.2l V8 32v FSI |
Feel free to contact us at info@mlperformance.co.uk should you wish to double check!
To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number (UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.
JHM-BBK-382x34
Manufactured by
JHM

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