• Mercedes-Benz AMG M178 Forged Internals
  • Mercedes-Benz AMG M178 Forged Internals
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YPG Motorsport

Mercedes-Benz AMG M178 Forged Internals| Rods & Pistons | YPG Motorsport

Mercedes-Benz AMG M178 Forged Internals| Rods & Pistons | YPG Motorsport

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£6,599.99 GBP
£7,999.99 GBP £6,599.99 GBP
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Mercedes-AMG M178 Forged Internals — Rods & Pistons Kit

The Mercedes-AMG M178 4.0L twin-turbo V8 is the performance-focused sibling of the M177, found exclusively in the AMG GT family. It shares the same 83mm bore and 92mm stroke as the M177 but uses a dry-sump oiling system for improved oil starvation protection under track conditions. Our M178 forged internals kit is specifically designed for the dry-sump architecture and pairs directly with the YPG Stage 4 M178 turbo system — the same combination that has demonstrated 1,200HP+ on pump fuel in our own builds.

What's Included:
Forged 4340 steel connecting rods — dry-sump compatible
Forged pistons — 83mm bore, optimised for forced induction
ARP rod bolts
Polished crankshaft
Compatible with YPG Stage 4 M178 turbo kit
Suitable for pump fuel, E30, E85, and methanol builds
Balanced and matched set — within ±1.5g

Compatible Vehicles:
AMG GT (2015–2023) — Coupe and Roadster
AMG GT S (2015–2023)
AMG GT C (2016–2023) — Coupe and Roadster
AMG GT R (2017–2023) and GT R Pro (2019–2023)
AMG GT Black Series (2020–2023)
AMG GT 63 S 4-Door E Performance (2018–2023)

Dry Sump Note:
The M178's dry-sump oiling system is a significant advantage for track use — it eliminates oil starvation during high-G cornering and braking that affects wet-sump engines. Our forged internals are designed and tested specifically for the M178's dry-sump architecture. All clearances and specifications are matched to the M178 block, not the M177. Do not interchange these kits.

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Frequently Asked Questions

How much does the Mercedes-Benz AMG M178 Forged Internals| Rods & Pi cost?

The Mercedes-Benz AMG M178 Forged Internals| Rods & Pi is $6599.99 through YPG Motorsport with free worldwide shipping.

Are these drop-in replacements?

Yes. Direct drop-in replacement for factory connecting rods and pistons. Designed for builds that exceed factory power levels.

Do you ship forged internals worldwide?

Yes. Free worldwide shipping on all YPG Motorsport forged internals.

FAQ

CAN I FINANCE MY ORDER

Yes. We offer a range of finance products. 

We offer the widely adopted Klarna and ClearPay for split weekly payments. 

We also offer longer term instalments via Klarna and NewPay.

Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions. 

WHAT IS YOUR RETURN POLICY?

Our policy lasts 14 days. If 14 days have gone by since your product arrives with you, unfortunately we can’t offer you a refund or exchange.

You can read our full returns policy here. 

DO YOU SHIP WORLDWIDE?

Yes. We ship worldwide. We have shipped to over 75 countries to date. 

WILL MY PRODUCTS INCLUDE A WARRANTY?

Yes. All products sold on the Reinhart Autohaus store may include any manufacturer warranties. For more information on warranties, check our terms. 

Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions. 

HOW LONG WILL IT TAKE TO ARRIVE?

Delivery times will vary depending on product, time of year, location and courier used.

Generally items in the UK will arrive within 1-3 days for express shipping and 2-5 days for standard or free shipping. 

For shipping outside of the UK, times will vary from 2-5 days for express shipping and 3-10 days for standard shipping.

Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions. 

WILL THESE PRODUCTS EFFECT MY VEHICLE WARRANTY

Some modifications can affect the manufacturer warranty provided with your vehicle. 

Whilst Reinhart Autohaus can advise, we cannot confirm if a product will or will not affect your vehicle warranty. It's always advised to check with your dealer and finance provider prior to purchasing and installing parts. 

Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions. 

WILL THIS FIT MY CAR

Please check the product page of the product in question, we include fitment information on every product. 

If this information is missing, please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions.