Select Vehicle From Dropdown

JHM Cap and Clamp Kit (JHM) SILICONE for Oil Cooler and Auxiliary Radiator Deletion for B6/B7 S4 and C5-allroad w chain 4.2L

SKU: JHM-4D0121324-078133335A



New for 2021! JHM silicone cap kit at less than half the price of our OEM cap kit.;

These are high quality JHM Silicone caps needed to remove the Auxiliary Radiator from a B6-B7 S4 (also supplied in our oil cooler kit). We tried other non OEM caps during the development of our Auxiliary Delete Kit in 2008 and 2009 and they did not hold up like the JHM ones that last as long as any factory hose or cap would.


This kit consists of 2 x High quality stainless steel Norma clamps, 1 x JHM 19mm (3/4") large cap for the upper radiator hose fitting to aux radiator and 1 x JHM 16mm (5/8") small cap for the block fitting which normally attaches to the hose that goes to the oil cooler on the block

This kit can be used to delete the discontinued aux radiator thermostat 8E0121055M and the aux radiator. We see these thermostats stick open and cause coolant temps to never warm up fully when the 8E0121055M thermostat fails.


NOTE: JHM does not recommend removal of the factory oil cooler completely since that is a downgrade from factory performance. We recommend running OEM or our upgraded oil cooler we sell in our Supercharger Kit or Aux Delete Kit . However we understand that some customers now do not plan on road racing their cars so the cost of fixing OEM or running our kit is not justified. This is why we are offering this product based on customer demand. Additionally, this is also a way to get our supercharger kit at a lower cost (Buy these and select that you already have our oil cooler when you order our SC Kit.)


For shipping quotes: Please sign in or join then put the items you want in your shopping cart and proceed to checkout.

This product fits the following vehicles:
Make Model Chassis Engine
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
Write Your Own Review
You're reviewing: JHM Cap and Clamp Kit (JHM) SILICONE for Oil Cooler and Auxiliary Radiator Deletion for B6/B7 S4 and C5-allroad w chain 4.2L
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.

Learn More:

Q and A

Product Questions

No questions yet. Be the first to ask the question!
You may also be interested in the following product(s)