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Description: RennTech has been at the forefront of Ecu tuning since electronic engine management started to show up...
Vendor: RennTech
SKU: PKG.205W.C63.R3
Product Type: Performance
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Subtotal: $23,880.00
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RennTech has been at the forefront of Ecu tuning since electronic engine management started to show up in vehicles during the mid 1980s. RennTech experience, countless hours of in-house research, development and exhaustive testing ensure that our proprietary Ecu upgrade offers incredible performance gains and rock solid daily driver reliability. RennTech lightweight forged billet turbo wheels feature a dramatically larger than stock impeller (inlet side) and an increase in the turbine trim (exhaust side).

This combination of high quality, lightweight components compensates for turbo lag despite being a functionally larger turbo. The cartridge supporting shaft is also both larger and stronger designed to handle the larger wheels and additional power. This entire cartridge is then fine balanced as a complete assembly to compensate for these increases. The impeller and turbine housings are then precision CNC machined and flow tested in-house to fit the larger internal cartridge. The end result is nothing short of spectacular with the RennTech R3 package gaining up to 222 hp and 83 lb-ft.

RennTech Sport Mufflers are made out of T-304 stainless steel (SS) and 100% hand crafted in the USA. This exhaust system is rigorously tested to remove any unwanted resonances in the cabin to deliver a deep sound that keeps with the character of a luxury performance vehicle. Our mufflers with 2 3/4 inch diameter tubing offer lighter weight than the stock exhaust and improve performance by reducing exhaust backpressure, increasing exhaust gas flow and cylinder scavenging. The RennTech Sport Muffler System for the W205 - C 63 AMG S Sedan comes with an integrated valve system and utilizes the electronic OEM actuators. The system comes with all the required hardware.

The RennTech BOV | Blow-Off Valve Adapters are designed as a quick bolt-in solution which are intended to release excessive pressure in high boost occasions. While releasing the pressure, the RennTech BOV adapters create the on turbo-charged engines well-known "blow-off" sound. CNC machined out of 6061-T6 aluminum, the RennTech BOV adapters are anodized in black and laser-etched. Due to utilizing the OEM electronic diverter valves, the RennTech BOV adapters will not trigger the Check-Engine light. The full set comes with 2 BOV adapters, 4 o-rings, 6 stainless steel bolts and an allen-wrench. The BOV adapters work perfectly in combination with the RennTech ECU Upgrade, due to the adjustments to the electronic OEM diverter valves.


This Turbo Upgrade requires an additional core charge, which will be credited upon return of OEM turbo core to RennTech 

Power gains are calculated with stock numbers measured by RennTech Our numbers will be dependend on conditions and fuel quality

No cutting or modification needed for BOV Adapter installation. Estimated installation time 30-60 min

Bolt-On Sport Mufflers System, no cutting or welding required. Utilizes electronic OEM actuators. Estimated installation time 30-60 min


  • RennTech Stainless Steel Sport Mufflers w/Electronic Valve System
  • RennTech stage II turbocharger Upgrade
  • RennTech blow-Off valve adapter
  • RennTech fuel system upgrade
  • RennTech Ecu upgrade
  • High-flow air filter
  • Long-lasting and driver reliability
  • Significant gains in horsepower
  • Incredible performance gains
  • Increasing exhaust gas flow 
  • Increases the performance
  • Significant gains torque 
  • Lighter weight exhaust
  • Improve performance
  • Sport Muffler System

Stock Performance:

  • 503 HP @ 5,500-6,250 rpm; 516 LB-FT @ 1,750-4,500 rpm
  • 545 HP @ 6,150 RPM; 550 LB-FT @ 3,700-4,700 RPM

Modified Performance:

  • 767 HP @ 6,600rpm; 633 LB-FT @ 3,350rpm
  • 660 whp @ 6,600rpm; 554wtq @ 3,350rpm

Performance Graph:

Vehicle Fitment:    

  • 2015 Mercedes-Benz W205 C63 AMG S
  • 2016 Mercedes-Benz W205 C63 AMG S
  • 2017 Mercedes-Benz W205 C63 AMG S
  • 2018 Mercedes-Benz W205 C63 AMG S
  • 2019 Mercedes-Benz W205 C63 AMG S


                            Images are for representation purpose only and may differ depending on application.

                              If you have any fitment questions, please feel free to reach out to our team via the contact methods below. If you are contacting us for any order status updates, please give us a call, or email us. We are a lean operation bringing you the best shopping experience possible. We are working on your orders as quickly as we can. We thank you for your patience.

                              Please reach out to us at (310) 231-0292 for sales inquiries if you are in the United States, Canada, Mexico.
                              For more in-depth product questions, fitment questions, product inquiries please email our performance specialists at
                              All other inquiries:
                              Please direct your inquiries to the chat functionality on our website.

                              Returns Policy

                              If a product is ordered and not wanted, the UNUSED item can be returned for a 25% restocking fee unless otherwise specified. In some cases, we may offer the ability to return the item to us for a lesser restocking fee and then keep the balance as a store credit. To return an item, it must be in brand new condition with original packaging.

                              We cannot accept a return on special ordered or custom items.

                              Shipping is non refundable in either direction unless approved by AutoTalent. All items wanting to be return MUST be reported within 30 days of the original invoice date. No items will be returnable after 30 days. All products shipped from the AutoTalent facility are shipped via FedEx, USPS, or USPS. Some packages shipped from the manufacturer may or may not require signatures for package release.

                              Special Order Items

                              Some items may be special order specifically for the customer’s vehicle. These items generally require a deposit or paid in full. Once this deposit amount is notified to the customer and they agree to order the special order item, the deposit becomes non-refundable. These special order items cannot be returned or resold. Cancellations are not allowed on special order parts.

                              AutoTalent DOES NOT REFUND SHIPPING CHARGES. If you modify, install, or alter the item in any form, we cannot accept it as a return. We will not cover any expenses related to the product or installation, and you may be required to purchase a replacement.

                              ** All cancellations that are requested that are NOT due to items not being in stock or delayed by the manufacturer are subject to a 5% processing fee. When you place an order with us we pay credit card fees that are NOT returned back to us. We will absorb these fees if we do not have the item in stock OR if you agree to the original ETA and that ETA is NOT met. If you decide to cancel for any other reason you will not receive this 5% fee back


                              We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

                              When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

                              Please also note that the shipping rates for many items we sell are weight-based.


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