
Chromoly 2541 alloy..
Fits all M104 engines with our double valve springs and 7mm valves!
Also fits with Mercedes OEM straight springs and m104.980 doubled springs.
Suitable for M104, M102-16v, M111, M119, M120
Revlimit with Supertech springs 9,000 rpm
M104.980 springs 7500 rpm.
Strongest retainers on the market!
Chromoly 2541!
Same type that used on rally cars.
Check your valve type! M104/M102-16v/M111/M120/M119