These valve springs are much stiffer than stock and are a direct fit. No modifications need to be done for them to fit.
https://www.benzinjection.com/....product-page/copy-of

 

www.benzinjection.com

Performance Valve Springs OM601, OM602, OM603 | Benz Injection

These valve springs are much stiffer than stock and are a direct fit. No modifications need to be done for them to fit. If you are running more boost and/or high RPM's on your OM60X, it is highly recommended to upgrade your valve springs. Otherwise,

Our valve springs are custom made to be 50% stiffer than stock. They are not just springs from another engine and are a direct fit. No modifications need to be done for them to fit. They are to be used with your stock spring seat washer and spring cap retainer. Simply remove your original springs and install these in their place.
https://www.benzinjection.com/....product-page/perform

 

www.benzinjection.com

Performance Valve Springs OM604, OM606, OM606 | Benz Injection

Upgrade your Mercedes-Benz OM604, OM605, and OM606 engines with high-performance valve springs from Benz Injection.

https://www.benzinjection.com/....product-page/mercede

 

www.benzinjection.com

Mercedes-Benz OM606 Turbo Diesel Engine | Benz Injection

If you would like to purchase other products with your engine, such as an injection pump, turbo, injectors, etc

https://www.benzinjection.com/....product-page/perform

 

www.benzinjection.com

Performance Rods for Naturally Aspirated Engines | Benz Injection

Mercedes-Benz Diesels Engine Performance Rods for Naturally Aspirated Engines

Injectors, Injection Pumps, Turbo Kits and more for Classic Mercedes-Benz Diesels | # injection pumps #turbo kits #diesel engines #benz fuel injection

Automóviles y Vehículos

Injectors, Injection Pumps, Turbo Kits and more for Classic Mercedes-Benz Diesels

High-quality injectors, injection pumps, and turbo kits designed for classic Mercedes-Benz diesel engines at BENZ INJECTION | Benz fuel injection.