- New

Reduces the weight by half from the OEM retainers.
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 10,000 rpm
M104.980 springs 8500 rpm.