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Your Vehicle 2026 Mercedes Benz GLC300 Base Sport Utility 254.646 L4 2.0L

Bottom End Engine Upgrade Package

Contains the hardware components necessary to upgrade the EA839 3.0T Turbocharged Engine
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
034Motorsport
Mfg Part #
034-202-D002-DSO
ECS Part #
ES#4877056
Brand
034Motorsport

SALE: 4597.20 (12% OFF)
WAS: $5200.00 on 05-01-2026

This product was last offered at the strikethrough price on
05-01-2026


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Product Details

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

 The 034Motorsport Bottom End Engine Upgrade Package contains hand-selected products from the expansive 034Motorsport catalog, put together by the experienced 034Motorsport Engineering Team to one comprehensive Bottom End Package for the 3.0 TFSI!

To see full details of the products included, please visit the below linked product pages.

034Motorsport Bottom End Engine Upgrade Package Contents:

  • Pauter 4340 Chromoly Cross-Beam Connecting Rod Set, Audi EA839 3.0T Turbocharged Engines
  • Wagner Tuning Pro Series Main Stud Set, Audi EA839 2.9T/3.0T Engines
  • Wagner Tuning Pro Series Head Stud Set, Audi 3.0 TFSI Supercharged & B9/B9.5 Audi 2.9/3.0 TFSI Turbocharged
  • JE Forged Piston Upgrade 10.0:1CR for Audi EA839 3.0T Turbocharged Engines

034Motorsport Bottom End Engine Upgrade Package Features:

Wagner Main & Head Studs:

  • Made of Ultra Clean Tool Steel.
  • Rolled Threads to Achieve Best Possible Strength.
  • Special Cone for Pretensioning and Best Possible Equal Load Distribution to the Entire Thread.
  • Hexagon Drive for Easy Installation.
  • Tensile Strength Beyond 1850 N / mm² (270,000 psi)
  • Unlike OE Bolts, They Can Be Reused Over and Over.

Pauter Rods:

  • Pauter Cross-Beam Design Rod Set for Audi 3.0T Turbocharged Engines.
  • Forged From 4340 CRMO, This Unique Cross Beam Rod Structure has Proven Extremely Strong and Reliable.
  • Tapered Small End to Work with OE Pistons
  • Sold as a Set of Six, Balanced End-to-End, Ready to Install
  • 155mm Long / 20mm Wrist Pin
  • E4340 Vacuum Melt Chromoly Forging
  • CNC Machined to Precise Tolerances
  • Accepts OEM Rod Bearings
  • Heat-Treated to Rockwell C36.
  • Full Coverage Shot Peened.
  • Rated for 200Ft⋅Lb Torque Per Rod at The Engine
  • Rods Supplied with ARP 2000 Bolts Rated at 220,000 PSI Tensile Strength.
  • Rods feature aluminum-bronze wrist pin bushings standard.

JE Forged Piston Upgrade:

  • Lower Compression Ratio
    • Stock 3.0T Compression Ratio: 11.2:1
    • 034Motorsport Ratio: 10.0:1
  • Heavy Duty Wrist Pins for Extra Strength
  • All Piston Rings Included
  • Euro Dish Piston Face
  • High Strength Forged Construction
  • Compatible With Factory Cylinder Wall Coatings
  • Stock Bore Size: 84.5mm (3.327”)
  • Pairs Perfectly with Pauter Connecting Rods
  • Note: JE Forged Pistons are Louder than Factory Pistons During Cold Start

** These are 11mm head studs and will require machining of the block, heads, and head gaskets.

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
Audi B9 S4 Quattro 3.0T Use vehicle selector to confirm fitment
Audi B9 S5 Quattro 3.0T Use vehicle selector to confirm fitment
Audi B9 S5 Quattro 3.0T Sportback Use vehicle selector to confirm fitment
Audi B9 S5 Quattro 3.0T Cabriolet Use vehicle selector to confirm fitment
Audi B9 SQ5 Quattro 3.0T Use vehicle selector to confirm fitment
Audi B9 SQ5 Sportback Quattro 3.0T Use vehicle selector to confirm fitment
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

This product is not eligible for Lifetime Replacement

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Return and Exchanges

Need to set up a return? Click here to begin: Return Process

All you need is your order number and email address.


New/Unused Product Returns

ECS Tuning will accept returns for unused products within 90 days of the ship date for a refund to the original payment method used. The customer is responsible for the return shipping costs and fees. If selecting to use a prepaid shipping label, the shipping cost will be deducted from the total refunded amount. All new/unused products must be new, unused and must be in the original packaging, including labeling, manuals, hardware, etc. Special order parts are non-refundable.

In the event that we find an error on our website or on behalf of an ECS Tuning Representative, we will provide a return shipping label from the original delivery location.

Refused Packages

Any domestic orders that are returned to ECS Tuning as refused by receiver or non-deliverable will be subject to a return handling fee and will be processed as a return in compliance with our standard return policy, including a 15% restocking fee.

Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.

Return Process

Return Process

ECS Tuning now offers an online returns solution! To get started, simply log into your ECS Tuning account, Click the "View Orders" button on the My Account home page and select the order that you wish to make a return on to begin. If you have any questions, feel free to reach out to our Customer Service Team for assistance!

Please note: Refunds will be processed to the original payment method used on the order or to an in store credit, respective to the type of return that is made as well as any pre-existing arrangements with an ECS Tuning Customer Service Representative. In the event that multiple forms of payment were used, we will refund the value to an in store credit. In the event that a return label is provided, these charges may be deducted from the total refund you receive.

Original shipping costs are non-refundable and the buyer is responsible for return shipping charges. ECS Tuning will not accept COD deliveries.


All in store credit balances will expire after one year from the original purchase date.

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Shipping Policy

Free Shipping On Orders $49 & Up

Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.

Free Shipping

Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.


The policies listed above are subject to change at any time without notice.

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Lifetime Replacement

Want to know more about our Lifetime Replacement program?

Click here to learn more.

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Why You Should Shop From ECS Tuning

ECS Tuning stands out as more than an automotive parts supplier-it's a vibrant community fueled by a shared passion for cars. Born from the enthusiasm of car lovers, we offer an unmatched understanding and commitment to the automotive world, providing high-quality parts and accessories sourced from our own experiences. Our selection is meticulously crafted to meet the highest standards of performance, quality, and design, catering to both the latest trends and classic styles.


Our distinct advantage lies in our passionate team and comprehensive support, offering expert advice and seamless service from selection to installation. Shopping with ECS brings exclusive perks, including our Lifetime Replacement Guarantee and free shipping on orders over $49, enhancing the value of every purchase. As a central hub for car enthusiasts, ECS Tuning fosters a rich community where ideas and experiences flourish, transforming us from a mere supplier into a platform where automotive dreams come to life.

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Cancellation Policy

At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.

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