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Holset HE221 Turbo
Genuine Holset HE221
Exhaust flange: T25

Please note that this turbo does not include a back plate and it uses a different compressor outlet flange than the other Holsets. You can choose to add them on to your purchase. Both are seen in the last photos.
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Holset HE221 Turbo | Benz Injection

Holset HE221 7cm2 Turbo, engineered for superior performance and reliability. Boost your engine’s power and efficiency with this top-quality turbocharger.

Comment

14 w

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

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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,

Comment

14 w

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