- Exhaust - 2.75" Performance High Flow Cat (HFC) Downpipes (JHM) for B8-B.5 RS4-RS5 4.2L *JHM HEADERS REQUIRED*
Exhaust - 2.75" Performance High Flow Cat (HFC) Downpipes (JHM) for B8-B.5 RS4-RS5 4.2L *JHM HEADERS REQUIRED*
Sale Price $1,274.96
JHM HD Linkage Cross Rod (Early) for B5-S4, C5 A6-allroad
Sale Price $169.96
JHM Supercharger Kit for B8-S5 w/ 4.2L FSI V8, Stage 1
Select options & add to cart to view final price
Exhaust - High-Flow Cat Downpipes with X-Pipe (JHM) for the B8 S4-S5 Q5-SQ5 C7 A6-A7 3.0T
Sale Price $1,359.96
Exhaust - Full - 2.75" Performance Exhaust - Valved - Downpipes and Cat-Back (JHM) for B8-RS5 4.2L
Sale Price $3,229.96
JHM 2.75" Performance High Flow Cat Downpipes for the B8 RS5 NOW AVAILABLE!
NOTE: JHM HEADERS OR EQUIVALENT REQUIRED FOR THIS UPGRADE. SINCE THESE HAVE HIGH FLOW CATS DOWNSTREAM YOU DO NOT WANT TO DOUBLE UP CATS IF YOU STILL HAVE FACTORY CATS IN YOUR VEHICLE
100% BOLT IN - NO CUTTING OR MODIFICATIONS TO YOUR STOCK CATBACK REQUIRED!
COMPATABLE WITH JHM 2.75" VALVED PERFORMANCE CATBACK!
If you already have our JHM RS5 Headers and our JHM RS5 Downpipe/X-Pipe combo but want to switch to HFC, contact us to purchase the HFC portion only that can replace your current JHM X-Pipe
Why 2.75 Inch piping diameter? After much research, calculations, testing and development we found that based on the 4.2L 32v V8 engine's demands, 2.75 Inch piping diameter is the optimal size. With a 2.5 inch exhaust you end up choking off the RS5's free spinning and high-revving V8. We have also found with a 2.75 inch cat back that torque is not sacrificed for power gains in the top end of the RPM band.
Gasket Matched Flanges: The stock headers on the B8-RS5 are a LARGER diameter than the stock downpipes. This creates a flow restriction and hinders performance. This is because the exhaust gas is forced into smaller diameter piping. Additionally, this transition from larger to smaller diameter piping is not a smooth transition. The smaller diameter of the stock downpipes introduces a wall that the exhaust gasses must first run into before being able to transition creating turbulence. With our JHM Gasket Matched Flanges and the larger diameter of our 2.75" exhaust piping, there is no longer hindrance in exhaust flow allowing optimal exhaust flow for optimal performance gains.
For shipping quotes: Please sign in or join then put the items you want in your shopping cart and proceed to checkout.
|4.2l V8 32v FSI
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.
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
Sale Price $424.96
Sale Price $509.96
Sale Price $14.44
Sale Price $424.96