One seals the holder to the cylinder head. The other seals the fuel injector inside the holder.
Failed seals lead to air intake leaks, causing your engine to idle too fast and run too lean. If you are removing and replacing your late 450 V8 K-Jetronic fuel injectors, these are the seals you should have on hand. Always replace the rubber seals. I know it is possible to reuse the plastic sleeves, but they are often brittle and can be damaged during removal. These went NLA about three years ago. Now we have them back, custom-made. If you need new holder,s you can order them separately below
1976 to 1980 450SL 450SE 450SEL Fuel Injector Seals Replacement Kit
$29.60
SKU:
GEG-450INJSEALS
Product Details
Kit contents:
- 8 new upper black injector seals
- 8 green high-temp sleeve-to-cylinder head O-rings
So you don't think you need to replace these parts? Think again...

If you are ordering our fuel injector set, then the seals are included so you do not need to order them separately. Check out our full kit below.
